add LaneNet

contrib/LaneNet/README.md

+# LaneNet 模型训练教程
+
+* 本教程旨在介绍如何通过使用PaddleSeg进行车道线检测
+
+* 在阅读本教程前，请确保您已经了解过PaddleSeg的[快速入门](../README.md#快速入门)和[基础功能](../README.md#基础功能)等章节，以便对PaddleSeg有一定的了解
+
+
+## 一. 准备待训练数据
+
+我们提前准备好了一份处理好的数据集，通过以下代码进行下载，该数据集由图森车道线检测数据集转换而来，你也可以在这个[页面](https://github.com/TuSimple/tusimple-benchmark/issues/3)下载原始数据集。
+
+```shell
+python dataset/download_tusimple.py
+```
+
+数据目录结构
+LaneNet
+|-- dataset
+    |-- tusimple_lane_detection
+        |-- training
+            |-- gt_binary_image
+            |-- gt_image
+            |-- gt_instance_image
+            |-- train_part.txt
+            |-- val_part.txt
+    
+## 二. 下载预训练模型
+
+下载[vgg预训练模型](https://paddle-imagenet-models-name.bj.bcebos.com/VGG16_pretrained.tar)，放在```pretrained_models```文件夹下。
+
+
+## 三. 准备配置
+
+接着我们需要确定相关配置，从本教程的角度，配置分为三部分：
+
+* 数据集
+  * 训练集主目录
+  * 训练集文件列表
+  * 测试集文件列表
+  * 评估集文件列表
+* 预训练模型
+  * 预训练模型名称
+  * 预训练模型的backbone网络
+  * 预训练模型路径
+* 其他
+  * 学习率
+  * Batch大小
+  * ...
+
+在三者中，预训练模型的配置尤为重要，如果模型或者BACKBONE配置错误，会导致预训练的参数没有加载，进而影响收敛速度。预训练模型相关的配置如第二步所展示。
+
+数据集的配置和数据路径有关，在本教程中，数据存放在`dataset/tusimple_lane_detection`中
+
+其他配置则根据数据集和机器环境的情况进行调节，最终我们保存一个如下内容的yaml配置文件，存放路径为**configs/lanenet.yaml**
+
+```yaml
+# 数据集配置
+DATASET: 
+    DATA_DIR: "./dataset/tusimple_lane_detection"
+    IMAGE_TYPE: "rgb"  # choice rgb or rgba
+    NUM_CLASSES: 2
+    TEST_FILE_LIST: "./dataset/tusimple_lane_detection/training/val_part.txt"
+    TRAIN_FILE_LIST: "./dataset/tusimple_lane_detection/training/train_part.txt"
+    VAL_FILE_LIST: "./dataset/tusimple_lane_detection/training/val_part.txt"
+    SEPARATOR: " "
+
+# 预训练模型配置
+MODEL:
+    MODEL_NAME: "lanenet"
+
+# 其他配置
+EVAL_CROP_SIZE: (512, 256) 
+TRAIN_CROP_SIZE: (512, 256)
+AUG: 
+    AUG_METHOD: u"unpadding" # choice unpadding rangescaling and stepscaling
+    FIX_RESIZE_SIZE: (512, 256) # (width, height), for unpadding
+    MIRROR: False
+    RICH_CROP: 
+        ENABLE: False 
+BATCH_SIZE: 4
+MEAN: [0.5, 0.5, 0.5]
+STD: [0.5, 0.5, 0.5]
+TEST:
+    TEST_MODEL: "./saved_model/lanenet/final/"
+TRAIN:
+    MODEL_SAVE_DIR: "./saved_model/lanenet/"
+    PRETRAINED_MODEL_DIR: "./pretrained_models/VGG16_pretrained"
+    SNAPSHOT_EPOCH: 5
+SOLVER:
+    NUM_EPOCHS: 100
+    LR: 0.0005
+    LR_POLICY: "poly"
+    OPTIMIZER: "sgd"
+    WEIGHT_DECAY: 0.001
+    CROSS_ENTROPY_WEIGHT: 'lanenet'
+```
+
+
+## 五. 开始训练
+
+使用下述命令启动训练
+
+```shell
+CUDA_VISIBLE_DEVICES=0 python -u train.py --cfg configs/lanenet.yaml --use_gpu --use_mpio --do_eval
+```
+
+## 六. 进行评估
+
+模型训练完成，使用下述命令启动评估
+
+```shell
+CUDA_VISIBLE_DEVICES=0 python -u eval.py --use_gpu --cfg configs/lanenet.yaml
+```
+
+## 七. 可视化
+我们提供了一个训练好的模型，点击[链接](https://paddleseg.bj.bcebos.com/models/LaneNet_vgg_tusimple.tar)，下载后放在```./pretrained_model/```下，使用如下命令进行可视化
+```shell
+CUDA_VISIBLE_DEVICES=0 python -u ./vis.py --cfg configs/lanenet.yaml --use_gpu --vis_dir vis_result
+```
+
+可视化结果示例：
+  
+  预测结果：![](imgs/0005_pred_lane.png)
+  分割结果：![](imgs/0005_pred_binary.png)
+  车道线实预测结果：![](imgs/0005_pred_instance.png)
+
+

contrib/LaneNet/configs/lanenet.yaml

+EVAL_CROP_SIZE: (512, 256) # (width, height), for unpadding rangescaling and stepscaling
+TRAIN_CROP_SIZE: (512, 256) # (width, height), for unpadding rangescaling and stepscaling
+AUG: 
+    AUG_METHOD: u"unpadding" # choice unpadding rangescaling and stepscaling
+    FIX_RESIZE_SIZE: (512, 256) # (width, height), for unpadding
+    INF_RESIZE_VALUE: 500  # for rangescaling
+    MAX_RESIZE_VALUE: 600  # for rangescaling
+    MIN_RESIZE_VALUE: 400  # for rangescaling
+    MAX_SCALE_FACTOR: 2.0  # for stepscaling
+    MIN_SCALE_FACTOR: 0.5  # for stepscaling
+    SCALE_STEP_SIZE: 0.25  # for stepscaling
+    MIRROR: False
+    RICH_CROP: 
+        ENABLE: False 
+
+BATCH_SIZE: 4
+MEAN: [0.5, 0.5, 0.5]
+STD: [0.5, 0.5, 0.5]
+
+DATALOADER: 
+    BUF_SIZE: 256
+    NUM_WORKERS: 4
+DATASET: 
+    DATA_DIR: "./dataset/tusimple_lane_detection"
+    IMAGE_TYPE: "rgb"  # choice rgb or rgba
+    NUM_CLASSES: 2
+    TEST_FILE_LIST: "./dataset/tusimple_lane_detection/training/val_part.txt"
+    TEST_TOTAL_IMAGES: 362
+    TRAIN_FILE_LIST: "./dataset/tusimple_lane_detection/training/train_part.txt"
+    TRAIN_TOTAL_IMAGES: 3264
+    VAL_FILE_LIST: "./dataset/tusimple_lane_detection/training/val_part.txt"
+    VAL_TOTAL_IMAGES: 362
+    SEPARATOR: " "
+    IGNORE_INDEX: 255
+
+FREEZE:
+    MODEL_FILENAME: "__model__"
+    PARAMS_FILENAME: "__params__"
+MODEL:
+    MODEL_NAME: "lanenet"
+    DEFAULT_NORM_TYPE: "bn"
+TEST:
+    TEST_MODEL: "./saved_model/lanenet/final/"
+TRAIN:
+    MODEL_SAVE_DIR: "./saved_model/lanenet/"
+    PRETRAINED_MODEL_DIR: "./pretrained_models/VGG16_pretrained"
+    SNAPSHOT_EPOCH: 1
+SOLVER:
+    NUM_EPOCHS: 100
+    LR: 0.0005
+    LR_POLICY: "poly"
+    OPTIMIZER: "sgd"
+    WEIGHT_DECAY: 0.001
+    CROSS_ENTROPY_WEIGHT: 'lanenet'
+

contrib/LaneNet/data_aug.py

+# coding: utf8
+# copyright (c) 2019 PaddlePaddle Authors. All Rights Reserve.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from __future__ import print_function
+import cv2
+import numpy as np
+from utils.config import cfg
+from models.model_builder import ModelPhase
+
+
+def resize(img, grt=None, grt_instance=None, mode=ModelPhase.TRAIN):
+    """
+    改变图像及标签图像尺寸
+    AUG.AUG_METHOD为unpadding，所有模式均直接resize到AUG.FIX_RESIZE_SIZE的尺寸
+    AUG.AUG_METHOD为stepscaling, 按比例resize，训练时比例范围AUG.MIN_SCALE_FACTOR到AUG.MAX_SCALE_FACTOR,间隔为AUG.SCALE_STEP_SIZE，其他模式返回原图
+    AUG.AUG_METHOD为rangescaling，长边对齐，短边按比例变化，训练时长边对齐范围AUG.MIN_RESIZE_VALUE到AUG.MAX_RESIZE_VALUE，其他模式长边对齐AUG.INF_RESIZE_VALUE
+
+    Args：
+        img(numpy.ndarray): 输入图像
+        grt(numpy.ndarray): 标签图像，默认为None
+        mode(string): 模式, 默认训练模式，即ModelPhase.TRAIN
+
+    Returns：
+        resize后的图像和标签图
+
+    """
+
+    if cfg.AUG.AUG_METHOD == 'unpadding':
+        target_size = cfg.AUG.FIX_RESIZE_SIZE
+        img = cv2.resize(img, target_size, interpolation=cv2.INTER_LINEAR)
+        if grt is not None:
+            grt = cv2.resize(grt, target_size, interpolation=cv2.INTER_NEAREST)
+        if grt_instance is not None:
+            grt_instance = cv2.resize(grt_instance, target_size, interpolation=cv2.INTER_NEAREST)
+    elif cfg.AUG.AUG_METHOD == 'stepscaling':
+        if mode == ModelPhase.TRAIN:
+            min_scale_factor = cfg.AUG.MIN_SCALE_FACTOR
+            max_scale_factor = cfg.AUG.MAX_SCALE_FACTOR
+            step_size = cfg.AUG.SCALE_STEP_SIZE
+            scale_factor = get_random_scale(min_scale_factor, max_scale_factor,
+                                            step_size)
+            img, grt = randomly_scale_image_and_label(
+                img, grt, scale=scale_factor)
+    elif cfg.AUG.AUG_METHOD == 'rangescaling':
+        min_resize_value = cfg.AUG.MIN_RESIZE_VALUE
+        max_resize_value = cfg.AUG.MAX_RESIZE_VALUE
+        if mode == ModelPhase.TRAIN:
+            if min_resize_value == max_resize_value:
+                random_size = min_resize_value
+            else:
+                random_size = int(
+                    np.random.uniform(min_resize_value, max_resize_value) + 0.5)
+        else:
+            random_size = cfg.AUG.INF_RESIZE_VALUE
+
+        value = max(img.shape[0], img.shape[1])
+        scale = float(random_size) / float(value)
+        img = cv2.resize(
+            img, (0, 0), fx=scale, fy=scale, interpolation=cv2.INTER_LINEAR)
+        if grt is not None:
+            grt = cv2.resize(
+                grt, (0, 0),
+                fx=scale,
+                fy=scale,
+                interpolation=cv2.INTER_NEAREST)
+    else:
+        raise Exception("Unexpect data augmention method: {}".format(
+            cfg.AUG.AUG_METHOD))
+
+    return img, grt, grt_instance
+
+
+def get_random_scale(min_scale_factor, max_scale_factor, step_size):
+    """
+    在一定范围内得到随机值，范围为min_scale_factor到max_scale_factor，间隔为step_size
+
+    Args：
+        min_scale_factor(float): 随机尺度下限，大于0
+        max_scale_factor(float): 随机尺度上限，不小于下限值
+        step_size(float): 尺度间隔，非负, 等于为0时直接返回min_scale_factor到max_scale_factor范围内任一值
+
+    Returns：
+        随机尺度值
+
+    """
+
+    if min_scale_factor < 0 or min_scale_factor > max_scale_factor:
+        raise ValueError('Unexpected value of min_scale_factor.')
+
+    if min_scale_factor == max_scale_factor:
+        return min_scale_factor
+
+    if step_size == 0:
+        return np.random.uniform(min_scale_factor, max_scale_factor)
+
+    num_steps = int((max_scale_factor - min_scale_factor) / step_size + 1)
+    scale_factors = np.linspace(min_scale_factor, max_scale_factor,
+                                num_steps).tolist()
+    np.random.shuffle(scale_factors)
+    return scale_factors[0]
+
+
+def randomly_scale_image_and_label(image, label=None, scale=1.0):
+    """
+    按比例resize图像和标签图, 如果scale为1，返回原图
+
+    Args：
+        image(numpy.ndarray): 输入图像
+        label(numpy.ndarray): 标签图，默认None
+        sclae(float): 图片resize的比例，非负，默认1.0
+
+    Returns：
+        resize后的图像和标签图
+
+    """
+
+    if scale == 1.0:
+        return image, label
+
+    height = image.shape[0]
+    width = image.shape[1]
+    new_height = int(height * scale + 0.5)
+    new_width = int(width * scale + 0.5)
+
+    new_image = cv2.resize(
+        image, (new_width, new_height), interpolation=cv2.INTER_LINEAR)
+    if label is not None:
+        height = label.shape[0]
+        width = label.shape[1]
+        new_height = int(height * scale + 0.5)
+        new_width = int(width * scale + 0.5)
+        new_label = cv2.resize(
+            label, (new_width, new_height), interpolation=cv2.INTER_NEAREST)
+    return new_image, new_label
+
+
+def random_rotation(crop_img, crop_seg, rich_crop_max_rotation, mean_value):
+    """
+    随机旋转图像和标签图
+
+    Args：
+        crop_img(numpy.ndarray): 输入图像
+        crop_seg(numpy.ndarray): 标签图
+        rich_crop_max_rotation(int)：旋转最大角度，0-90
+        mean_value(list)：均值, 对图片旋转产生的多余区域使用均值填充
+
+    Returns：
+        旋转后的图像和标签图
+
+    """
+    ignore_index = cfg.DATASET.IGNORE_INDEX
+    if rich_crop_max_rotation > 0:
+        (h, w) = crop_img.shape[:2]
+        do_rotation = np.random.uniform(-rich_crop_max_rotation,
+                                        rich_crop_max_rotation)
+        pc = (w // 2, h // 2)
+        r = cv2.getRotationMatrix2D(pc, do_rotation, 1.0)
+        cos = np.abs(r[0, 0])
+        sin = np.abs(r[0, 1])
+
+        nw = int((h * sin) + (w * cos))
+        nh = int((h * cos) + (w * sin))
+
+        (cx, cy) = pc
+        r[0, 2] += (nw / 2) - cx
+        r[1, 2] += (nh / 2) - cy
+        dsize = (nw, nh)
+        crop_img = cv2.warpAffine(
+            crop_img,
+            r,
+            dsize=dsize,
+            flags=cv2.INTER_LINEAR,
+            borderMode=cv2.BORDER_CONSTANT,
+            borderValue=mean_value)
+        crop_seg = cv2.warpAffine(
+            crop_seg,
+            r,
+            dsize=dsize,
+            flags=cv2.INTER_NEAREST,
+            borderMode=cv2.BORDER_CONSTANT,
+            borderValue=(ignore_index, ignore_index, ignore_index))
+    return crop_img, crop_seg
+
+
+def rand_scale_aspect(crop_img,
+                      crop_seg,
+                      rich_crop_min_scale=0,
+                      rich_crop_aspect_ratio=0):
+    """
+    从输入图像和标签图像中裁取随机宽高比的图像，并reszie回原始尺寸
+
+    Args:
+        crop_img(numpy.ndarray): 输入图像
+        crop_seg(numpy.ndarray): 标签图像
+        rich_crop_min_scale(float)：裁取图像占原始图像的面积比，0-1，默认0返回原图
+        rich_crop_aspect_ratio(float): 裁取图像的宽高比范围，非负，默认0返回原图
+
+    Returns:
+        裁剪并resize回原始尺寸的图像和标签图像
+
+    """
+    if rich_crop_min_scale == 0 or rich_crop_aspect_ratio == 0:
+        return crop_img, crop_seg
+    else:
+        img_height = crop_img.shape[0]
+        img_width = crop_img.shape[1]
+        for i in range(0, 10):
+            area = img_height * img_width
+            target_area = area * np.random.uniform(rich_crop_min_scale, 1.0)
+            aspectRatio = np.random.uniform(rich_crop_aspect_ratio,
+                                            1.0 / rich_crop_aspect_ratio)
+
+            dw = int(np.sqrt(target_area * 1.0 * aspectRatio))
+            dh = int(np.sqrt(target_area * 1.0 / aspectRatio))
+            if (np.random.randint(10) < 5):
+                tmp = dw
+                dw = dh
+                dh = tmp
+
+            if (dh < img_height and dw < img_width):
+                h1 = np.random.randint(0, img_height - dh)
+                w1 = np.random.randint(0, img_width - dw)
+
+                crop_img = crop_img[h1:(h1 + dh), w1:(w1 + dw), :]
+                crop_seg = crop_seg[h1:(h1 + dh), w1:(w1 + dw)]
+                crop_img = cv2.resize(
+                    crop_img, (img_width, img_height),
+                    interpolation=cv2.INTER_LINEAR)
+                crop_seg = cv2.resize(
+                    crop_seg, (img_width, img_height),
+                    interpolation=cv2.INTER_NEAREST)
+                break
+
+        return crop_img, crop_seg
+
+
+def saturation_jitter(cv_img, jitter_range):
+    """
+    调节图像饱和度
+
+    Args:
+        cv_img(numpy.ndarray): 输入图像
+        jitter_range(float): 调节程度，0-1
+
+    Returns:
+        饱和度调整后的图像
+
+    """
+
+    greyMat = cv2.cvtColor(cv_img, cv2.COLOR_BGR2GRAY)
+    greyMat = greyMat[:, :, None] * np.ones(3, dtype=int)[None, None, :]
+    cv_img = cv_img.astype(np.float32)
+    cv_img = cv_img * (1 - jitter_range) + jitter_range * greyMat
+    cv_img = np.where(cv_img > 255, 255, cv_img)
+    cv_img = cv_img.astype(np.uint8)
+    return cv_img
+
+
+def brightness_jitter(cv_img, jitter_range):
+    """
+    调节图像亮度
+
+    Args:
+        cv_img(numpy.ndarray): 输入图像
+        jitter_range(float): 调节程度，0-1
+
+    Returns:
+        亮度调整后的图像
+
+    """
+
+    cv_img = cv_img.astype(np.float32)
+    cv_img = cv_img * (1.0 - jitter_range)
+    cv_img = np.where(cv_img > 255, 255, cv_img)
+    cv_img = cv_img.astype(np.uint8)
+    return cv_img
+
+
+def contrast_jitter(cv_img, jitter_range):
+    """
+    调节图像对比度
+
+    Args:
+        cv_img(numpy.ndarray): 输入图像
+        jitter_range(float): 调节程度，0-1
+
+    Returns:
+        对比度调整后的图像
+
+    """
+
+    greyMat = cv2.cvtColor(cv_img, cv2.COLOR_BGR2GRAY)
+    mean = np.mean(greyMat)
+    cv_img = cv_img.astype(np.float32)
+    cv_img = cv_img * (1 - jitter_range) + jitter_range * mean
+    cv_img = np.where(cv_img > 255, 255, cv_img)
+    cv_img = cv_img.astype(np.uint8)
+    return cv_img
+
+
+def random_jitter(cv_img, saturation_range, brightness_range, contrast_range):
+    """
+    图像亮度、饱和度、对比度调节，在调整范围内随机获得调节比例，并随机顺序叠加三种效果
+
+    Args:
+        cv_img(numpy.ndarray): 输入图像
+        saturation_range(float): 饱和对调节范围，0-1
+        brightness_range(float): 亮度调节范围，0-1
+        contrast_range(float): 对比度调节范围，0-1
+
+    Returns:
+        亮度、饱和度、对比度调整后图像
+
+    """
+
+    saturation_ratio = np.random.uniform(-saturation_range, saturation_range)
+    brightness_ratio = np.random.uniform(-brightness_range, brightness_range)
+    contrast_ratio = np.random.uniform(-contrast_range, contrast_range)
+
+    order = [1, 2, 3]
+    np.random.shuffle(order)
+
+    for i in range(3):
+        if order[i] == 0:
+            cv_img = saturation_jitter(cv_img, saturation_ratio)
+        if order[i] == 1:
+            cv_img = brightness_jitter(cv_img, brightness_ratio)
+        if order[i] == 2:
+            cv_img = contrast_jitter(cv_img, contrast_ratio)
+    return cv_img
+
+
+def hsv_color_jitter(crop_img,
+                     brightness_jitter_ratio=0,
+                     saturation_jitter_ratio=0,
+                     contrast_jitter_ratio=0):
+    """
+    图像亮度、饱和度、对比度调节
+
+    Args:
+        crop_img(numpy.ndarray): 输入图像
+        brightness_jitter_ratio(float): 亮度调节度最大值，1-0，默认0
+        saturation_jitter_ratio(float): 饱和度调节度最大值，1-0，默认0
+        contrast_jitter_ratio(float): 对比度调节度最大值，1-0，默认0
+
+    Returns：
+        亮度、饱和度、对比度调节后图像
+
+   """
+
+    if brightness_jitter_ratio > 0 or \
+        saturation_jitter_ratio > 0 or \
+        contrast_jitter_ratio > 0:
+        crop_img = random_jitter(crop_img, saturation_jitter_ratio,
+                      brightness_jitter_ratio, contrast_jitter_ratio)
+    return crop_img
+
+
+def rand_crop(crop_img, crop_seg, mode=ModelPhase.TRAIN):
+    """
+    随机裁剪图片和标签图, 若crop尺寸大于原始尺寸，分别使用均值和ignore值填充再进行crop，
+    crop尺寸与原始尺寸一致，返回原图，crop尺寸小于原始尺寸直接crop
+
+    Args:
+        crop_img(numpy.ndarray): 输入图像
+        crop_seg(numpy.ndarray): 标签图
+        mode(string): 模式, 默认训练模式，验证或预测、可视化模式时crop尺寸需大于原始图片尺寸
+
+    Returns：
+        裁剪后的图片和标签图
+
+    """
+
+    img_height = crop_img.shape[0]
+    img_width = crop_img.shape[1]
+
+    if ModelPhase.is_train(mode):
+        crop_width = cfg.TRAIN_CROP_SIZE[0]
+        crop_height = cfg.TRAIN_CROP_SIZE[1]
+    else:
+        crop_width = cfg.EVAL_CROP_SIZE[0]
+        crop_height = cfg.EVAL_CROP_SIZE[1]
+
+    if not ModelPhase.is_train(mode): 
+        if (crop_height < img_height or crop_width < img_width):
+            raise Exception(
+                "Crop size({},{}) must large than img size({},{}) when in EvalPhase."
+                .format(crop_width, crop_height, img_width, img_height))
+
+    if img_height == crop_height and img_width == crop_width:
+        return crop_img, crop_seg
+    else:
+        pad_height = max(crop_height - img_height, 0)
+        pad_width = max(crop_width - img_width, 0)
+        if (pad_height > 0 or pad_width > 0):
+            crop_img = cv2.copyMakeBorder(
+                crop_img,
+                0,
+                pad_height,
+                0,
+                pad_width,
+                cv2.BORDER_CONSTANT,
+                value=cfg.DATASET.PADDING_VALUE)
+            if crop_seg is not None:
+                crop_seg = cv2.copyMakeBorder(
+                    crop_seg,
+                    0,
+                    pad_height,
+                    0,
+                    pad_width,
+                    cv2.BORDER_CONSTANT,
+                    value=cfg.DATASET.IGNORE_INDEX)
+            img_height = crop_img.shape[0]
+            img_width = crop_img.shape[1]
+
+        if crop_height > 0 and crop_width > 0:
+            h_off = np.random.randint(img_height - crop_height + 1)
+            w_off = np.random.randint(img_width - crop_width + 1)
+
+            crop_img = crop_img[h_off:(crop_height + h_off), w_off:(
+                w_off + crop_width), :]
+            if crop_seg is not None:
+                crop_seg = crop_seg[h_off:(crop_height + h_off), w_off:(
+                    w_off + crop_width)]
+        return crop_img, crop_seg

contrib/LaneNet/dataset/download_tusimple.py

+# Copyright (c) 2019  PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import sys
+import os
+
+LOCAL_PATH = os.path.dirname(os.path.abspath(__file__))
+TEST_PATH = os.path.join(LOCAL_PATH, "../../../", "test")
+sys.path.append(TEST_PATH)
+
+from test_utils import download_file_and_uncompress
+
+
+def download_tusimple_dataset(savepath, extrapath):
+    url = "https://paddleseg.bj.bcebos.com/dataset/tusimple_lane_detection.tar"
+    download_file_and_uncompress(
+        url=url, savepath=savepath, extrapath=extrapath)
+
+
+if __name__ == "__main__":
+    download_tusimple_dataset(LOCAL_PATH, LOCAL_PATH)
+    print("Dataset download finish!")

contrib/LaneNet/eval.py

+# coding: utf8
+# copyright (c) 2019 PaddlePaddle Authors. All Rights Reserve.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import os
+# GPU memory garbage collection optimization flags
+os.environ['FLAGS_eager_delete_tensor_gb'] = "0.0"
+
+import sys
+
+cur_path = os.path.abspath(os.path.dirname(__file__))
+root_path = os.path.split(os.path.split(cur_path)[0])[0]
+sys.path.append(root_path)
+
+import time
+import argparse
+import functools
+import pprint
+import cv2
+import numpy as np
+import paddle
+import paddle.fluid as fluid
+
+from utils.config import cfg
+from utils.timer import Timer, calculate_eta
+from models.model_builder import build_model
+from models.model_builder import ModelPhase
+from reader import LaneNetDataset
+
+
+def parse_args():
+    parser = argparse.ArgumentParser(description='PaddleSeg model evalution')
+    parser.add_argument(
+        '--cfg',
+        dest='cfg_file',
+        help='Config file for training (and optionally testing)',
+        default=None,
+        type=str)
+    parser.add_argument(
+        '--use_gpu',
+        dest='use_gpu',
+        help='Use gpu or cpu',
+        action='store_true',
+        default=False)
+    parser.add_argument(
+        '--use_mpio',
+        dest='use_mpio',
+        help='Use multiprocess IO or not',
+        action='store_true',
+        default=False)
+    parser.add_argument(
+        'opts',
+        help='See utils/config.py for all options',
+        default=None,
+        nargs=argparse.REMAINDER)
+    if len(sys.argv) == 1:
+        parser.print_help()
+        sys.exit(1)
+    return parser.parse_args()
+
+
+def evaluate(cfg, ckpt_dir=None, use_gpu=False, use_mpio=False, **kwargs):
+    np.set_printoptions(precision=5, suppress=True)
+
+    startup_prog = fluid.Program()
+    test_prog = fluid.Program()
+
+    dataset = LaneNetDataset(
+        file_list=cfg.DATASET.VAL_FILE_LIST,
+        mode=ModelPhase.TRAIN,
+        shuffle=True,
+        data_dir=cfg.DATASET.DATA_DIR)
+
+    def data_generator():
+        #TODO: check is batch reader compatitable with Windows
+        if use_mpio:
+            data_gen = dataset.multiprocess_generator(
+                num_processes=cfg.DATALOADER.NUM_WORKERS,
+                max_queue_size=cfg.DATALOADER.BUF_SIZE)
+        else:
+            data_gen = dataset.generator()
+
+        for b in data_gen:
+            yield b
+
+    py_reader, pred, grts, masks, accuracy, fp, fn = build_model(
+        test_prog, startup_prog, phase=ModelPhase.EVAL)
+
+    py_reader.decorate_sample_generator(
+        data_generator, drop_last=False, batch_size=cfg.BATCH_SIZE)
+
+    # Get device environment
+    places = fluid.cuda_places() if use_gpu else fluid.cpu_places()
+    place = places[0]
+    dev_count = len(places)
+    print("#Device count: {}".format(dev_count))
+
+    exe = fluid.Executor(place)
+    exe.run(startup_prog)
+
+    test_prog = test_prog.clone(for_test=True)
+
+    ckpt_dir = cfg.TEST.TEST_MODEL if not ckpt_dir else ckpt_dir
+
+    if ckpt_dir is not None:
+        print('load test model:', ckpt_dir)
+        fluid.io.load_params(exe, ckpt_dir, main_program=test_prog)
+
+    # Use streaming confusion matrix to calculate mean_iou
+    np.set_printoptions(
+        precision=4, suppress=True, linewidth=160, floatmode="fixed")
+    fetch_list = [pred.name, grts.name, masks.name, accuracy.name, fp.name, fn.name]
+    num_images = 0
+    step = 0
+    avg_acc = 0.0
+    avg_fp = 0.0
+    avg_fn = 0.0
+    # cur_images = 0
+    all_step = cfg.DATASET.TEST_TOTAL_IMAGES // cfg.BATCH_SIZE + 1
+    timer = Timer()
+    timer.start()
+    py_reader.start()
+    while True:
+        try:
+            step += 1
+            pred, grts, masks, out_acc, out_fp, out_fn = exe.run(
+                test_prog, fetch_list=fetch_list, return_numpy=True)
+
+            avg_acc += np.mean(out_acc) * pred.shape[0]
+            avg_fp += np.mean(out_fp) * pred.shape[0]
+            avg_fn += np.mean(out_fn) * pred.shape[0]
+            num_images += pred.shape[0]
+
+            speed = 1.0 / timer.elapsed_time()
+
+            print(
+                "[EVAL]step={} accuracy={:.4f} fp={:.4f} fn={:.4f} step/sec={:.2f} | ETA {}"
+                .format(step, avg_acc / num_images, avg_fp / num_images, avg_fn / num_images, speed,
+                        calculate_eta(all_step - step, speed)))
+
+            timer.restart()
+            sys.stdout.flush()
+        except fluid.core.EOFException:
+            break
+
+    print("[EVAL]#image={} accuracy={:.4f} fp={:.4f} fn={:.4f}".format(
+        num_images, avg_acc / num_images, avg_fp / num_images, avg_fn / num_images))
+
+    return avg_acc / num_images, avg_fp / num_images, avg_fn / num_images
+
+
+def main():
+    args = parse_args()
+    if args.cfg_file is not None:
+        cfg.update_from_file(args.cfg_file)
+    if args.opts:
+        cfg.update_from_list(args.opts)
+    cfg.check_and_infer()
+    print(pprint.pformat(cfg))
+    evaluate(cfg, **args.__dict__)
+
+
+if __name__ == '__main__':
+    main()

contrib/LaneNet/loss.py

+# coding: utf8
+# copyright (c) 2019 PaddlePaddle Authors. All Rights Reserve.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import paddle.fluid as fluid
+import numpy as np
+from utils.config import cfg
+
+def softmax_with_loss(logit, label, ignore_mask=None, num_classes=2, weight=None):
+    ignore_mask = fluid.layers.cast(ignore_mask, 'float32')
+    label = fluid.layers.elementwise_min(
+        label, fluid.layers.assign(np.array([num_classes - 1], dtype=np.int32)))
+    logit = fluid.layers.transpose(logit, [0, 2, 3, 1])
+    logit = fluid.layers.reshape(logit, [-1, num_classes])
+    label = fluid.layers.reshape(label, [-1, 1])
+    label = fluid.layers.cast(label, 'int64')
+
+    ignore_mask = fluid.layers.reshape(ignore_mask, [-1, 1])
+
+    if weight is None:
+        loss, probs = fluid.layers.softmax_with_cross_entropy(
+            logit,
+            label,
+            ignore_index=cfg.DATASET.IGNORE_INDEX,
+            return_softmax=True)
+    else:
+        label_one_hot = fluid.layers.one_hot(input=label, depth=num_classes)
+        if isinstance(weight, list):
+            assert len(weight) == num_classes, "weight length must equal num of classes"
+            weight = fluid.layers.assign(np.array([weight], dtype='float32'))
+        elif isinstance(weight, fluid.layers.Variable):
+            pass
+        else:
+            tmp = []
+            total_num = fluid.layers.cast(fluid.layers.shape(label)[0], 'float32')
+            for i in range(num_classes):
+                cls_pixel_num = fluid.layers.reduce_sum(label_one_hot[:, i])
+                ratio = total_num / (cls_pixel_num + 1)
+                tmp.append(ratio)
+            weight = fluid.layers.concat(tmp)
+            weight = weight / fluid.layers.reduce_sum(weight) * num_classes
+        weight = fluid.layers.reshape(weight, [1, num_classes])
+        weighted_label_one_hot = fluid.layers.elementwise_mul(label_one_hot, weight)
+        probs = fluid.layers.softmax(logit)
+        loss = fluid.layers.cross_entropy(
+            probs,
+            weighted_label_one_hot,
+            soft_label=True,
+            ignore_index=cfg.DATASET.IGNORE_INDEX)
+        weighted_label_one_hot.stop_gradient = True
+
+    loss = loss * ignore_mask
+    avg_loss = fluid.layers.mean(loss) / fluid.layers.mean(ignore_mask)
+
+    label.stop_gradient = True
+    ignore_mask.stop_gradient = True
+    return avg_loss
+
+
+def multi_softmax_with_loss(logits, label, ignore_mask=None, num_classes=2, weight=None):
+    if isinstance(logits, tuple):
+        avg_loss = 0
+        for i, logit in enumerate(logits):
+            logit_label = fluid.layers.resize_nearest(label, logit.shape[2:])
+            logit_mask = (logit_label.astype('int32') !=
+                          cfg.DATASET.IGNORE_INDEX).astype('int32')
+            loss = softmax_with_loss(logit, logit_label, logit_mask,
+                                     num_classes)
+            avg_loss += cfg.MODEL.MULTI_LOSS_WEIGHT[i] * loss
+    else:
+        avg_loss = softmax_with_loss(logits, label, ignore_mask, num_classes, weight)
+    return avg_loss
+
+
+def unsorted_segment_sum(data, segment_ids, unique_labels, feature_dims):
+    zeros = fluid.layers.fill_constant_batch_size_like(unique_labels, shape=[1, feature_dims],
+                                                       dtype='float32', value=0)
+    segment_ids = fluid.layers.unsqueeze(segment_ids, axes=[1])
+    segment_ids.stop_gradient = True
+    segment_sum = fluid.layers.scatter_nd_add(zeros, segment_ids, data)
+    zeros.stop_gradient = True
+
+    return segment_sum
+
+
+def norm(x, axis=-1):
+    distance = fluid.layers.reduce_sum(fluid.layers.abs(x), dim=axis, keep_dim=True)
+    return distance
+
+def discriminative_loss_single(
+        prediction,
+        correct_label,
+        feature_dim,
+        label_shape,
+        delta_v,
+        delta_d,
+        param_var,
+        param_dist,
+        param_reg):
+
+    correct_label = fluid.layers.reshape(
+        correct_label, [
+            label_shape[1] * label_shape[0]])
+    prediction = fluid.layers.transpose(prediction, [1, 2, 0])
+    reshaped_pred = fluid.layers.reshape(
+        prediction, [
+            label_shape[1] * label_shape[0], feature_dim])
+
+    unique_labels, unique_id, counts = fluid.layers.unique_with_counts(correct_label)
+    correct_label.stop_gradient = True
+    counts = fluid.layers.cast(counts, 'float32')
+    num_instances = fluid.layers.shape(unique_labels)
+
+    segmented_sum = unsorted_segment_sum(
+        reshaped_pred, unique_id, unique_labels, feature_dims=feature_dim)
+
+    counts_rsp = fluid.layers.reshape(counts, (-1, 1))
+    mu = fluid.layers.elementwise_div(segmented_sum, counts_rsp)
+    counts_rsp.stop_gradient = True
+    mu_expand = fluid.layers.gather(mu, unique_id)
+    tmp = fluid.layers.elementwise_sub(mu_expand, reshaped_pred)
+
+    distance = norm(tmp)
+    distance = distance - delta_v
+
+    distance_pos = fluid.layers.greater_equal(distance, fluid.layers.zeros_like(distance))
+    distance_pos = fluid.layers.cast(distance_pos, 'float32')
+    distance = distance * distance_pos
+
+    distance = fluid.layers.square(distance)
+
+    l_var = unsorted_segment_sum(distance, unique_id, unique_labels, feature_dims=1)
+    l_var = fluid.layers.elementwise_div(l_var, counts_rsp)
+    l_var = fluid.layers.reduce_sum(l_var)
+    l_var = l_var / fluid.layers.cast(num_instances * (num_instances - 1), 'float32')
+
+    mu_interleaved_rep = fluid.layers.expand(mu, [num_instances, 1])
+    mu_band_rep = fluid.layers.expand(mu, [1, num_instances])
+    mu_band_rep = fluid.layers.reshape(mu_band_rep, (num_instances * num_instances, feature_dim))
+
+    mu_diff = fluid.layers.elementwise_sub(mu_band_rep, mu_interleaved_rep)
+
+    intermediate_tensor = fluid.layers.reduce_sum(fluid.layers.abs(mu_diff), dim=1)
+    intermediate_tensor.stop_gradient = True
+    zero_vector = fluid.layers.zeros([1], 'float32')
+    bool_mask = fluid.layers.not_equal(intermediate_tensor, zero_vector)
+    temp = fluid.layers.where(bool_mask)
+    mu_diff_bool = fluid.layers.gather(mu_diff, temp)
+
+    mu_norm = norm(mu_diff_bool)
+    mu_norm = 2. * delta_d - mu_norm
+    mu_norm_pos = fluid.layers.greater_equal(mu_norm, fluid.layers.zeros_like(mu_norm))
+    mu_norm_pos = fluid.layers.cast(mu_norm_pos, 'float32')
+    mu_norm = mu_norm * mu_norm_pos
+    mu_norm_pos.stop_gradient = True
+
+    mu_norm = fluid.layers.square(mu_norm)
+
+    l_dist = fluid.layers.reduce_mean(mu_norm)
+
+    l_reg = fluid.layers.reduce_mean(norm(mu, axis=1))
+
+    l_var = param_var * l_var
+    l_dist = param_dist * l_dist
+    l_reg = param_reg * l_reg
+    loss = l_var + l_dist + l_reg
+    return loss, l_var, l_dist, l_reg
+
+
+def discriminative_loss(prediction, correct_label, feature_dim, image_shape,
+                        delta_v, delta_d, param_var, param_dist, param_reg):
+    batch_size = int(cfg.BATCH_SIZE_PER_DEV)
+    output_ta_loss = 0.
+    output_ta_var = 0.
+    output_ta_dist = 0.
+    output_ta_reg = 0.
+    for i in range(batch_size):
+        disc_loss_single, l_var_single, l_dist_single, l_reg_single = discriminative_loss_single(
+            prediction[i], correct_label[i], feature_dim, image_shape, delta_v, delta_d, param_var, param_dist,
+            param_reg)
+        output_ta_loss += disc_loss_single
+        output_ta_var += l_var_single
+        output_ta_dist += l_dist_single
+        output_ta_reg += l_reg_single
+
+    disc_loss = output_ta_loss / batch_size
+    l_var = output_ta_var / batch_size
+    l_dist = output_ta_dist / batch_size
+    l_reg = output_ta_reg / batch_size
+    return disc_loss, l_var, l_dist, l_reg
+
+

contrib/LaneNet/models/__init__.py

+# coding: utf8
+# copyright (c) 2019 PaddlePaddle Authors. All Rights Reserve.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import models.modeling
+import models.libs
+import models.backbone

contrib/LaneNet/models/backbone/vgg.py

+#copyright (c) 2019 PaddlePaddle Authors. All Rights Reserve.
+#
+#Licensed under the Apache License, Version 2.0 (the "License");
+#you may not use this file except in compliance with the License.
+#You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+#Unless required by applicable law or agreed to in writing, software
+#distributed under the License is distributed on an "AS IS" BASIS,
+#WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#See the License for the specific language governing permissions and
+#limitations under the License.
+
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import paddle
+import paddle.fluid as fluid
+from paddle.fluid import ParamAttr
+
+__all__ = ["VGGNet", "VGG11", "VGG13", "VGG16", "VGG19"]
+
+
+class VGGNet():
+    def __init__(self, layers=16):
+        self.layers = layers
+
+    def net(self, input, class_dim=1000):
+        layers = self.layers
+        vgg_spec = {
+            11: ([1, 1, 2, 2, 2]),
+            13: ([2, 2, 2, 2, 2]),
+            16: ([2, 2, 3, 3, 3]),
+            19: ([2, 2, 4, 4, 4])
+        }
+        assert layers in vgg_spec.keys(), \
+            "supported layers are {} but input layer is {}".format(vgg_spec.keys(), layers)
+
+        fetures_dict = {}
+        nums = vgg_spec[layers]
+        conv1 = self.conv_block(input, 64, nums[0], name="conv1_")
+        conv2 = self.conv_block(conv1, 128, nums[1], name="conv2_")
+        conv3 = self.conv_block(conv2, 256, nums[2], name="conv3_")
+        conv4 = self.conv_block(conv3, 512, nums[3], name="conv4_")
+        conv5 = self.conv_block(conv4, 512, nums[4], name="conv5_")
+        fetures_dict['pool3'] = conv3
+        fetures_dict['pool4'] = conv4
+        fetures_dict['pool5'] = conv5
+        return fetures_dict
+        fc_dim = 4096
+        fc_name = ["fc6", "fc7", "fc8"]
+        fc1 = fluid.layers.fc(
+            input=conv5,
+            size=fc_dim,
+            act='relu',
+            param_attr=fluid.param_attr.ParamAttr(name=fc_name[0] + "_weights"),
+            bias_attr=fluid.param_attr.ParamAttr(name=fc_name[0] + "_offset"))
+        fc1 = fluid.layers.dropout(x=fc1, dropout_prob=0.5)
+        fc2 = fluid.layers.fc(
+            input=fc1,
+            size=fc_dim,
+            act='relu',
+            param_attr=fluid.param_attr.ParamAttr(name=fc_name[1] + "_weights"),
+            bias_attr=fluid.param_attr.ParamAttr(name=fc_name[1] + "_offset"))
+        fc2 = fluid.layers.dropout(x=fc2, dropout_prob=0.5)
+        out = fluid.layers.fc(
+            input=fc2,
+            size=class_dim,
+            param_attr=fluid.param_attr.ParamAttr(name=fc_name[2] + "_weights"),
+            bias_attr=fluid.param_attr.ParamAttr(name=fc_name[2] + "_offset"))
+
+        return out
+
+    def conv_block(self, input, num_filter, groups, name=None):
+        conv = input
+        for i in range(groups):
+            conv = fluid.layers.conv2d(
+                input=conv,
+                num_filters=num_filter,
+                filter_size=3,
+                stride=1,
+                padding=1,
+                act='relu',
+                param_attr=fluid.param_attr.ParamAttr(
+                    name=name + str(i + 1) + "_weights"),
+                bias_attr=False)
+        return fluid.layers.pool2d(
+            input=conv, pool_size=2, pool_type='max', pool_stride=2)
+
+
+def VGG11():
+    model = VGGNet(layers=11)
+    return model
+
+
+def VGG13():
+    model = VGGNet(layers=13)
+    return model
+
+
+def VGG16():
+    model = VGGNet(layers=16)
+    return model
+
+
+def VGG19():
+    model = VGGNet(layers=19)
+    return model

contrib/LaneNet/models/libs/model_libs.py

+# coding: utf8
+# copyright (c) 2019 PaddlePaddle Authors. All Rights Reserve.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+import paddle
+import paddle.fluid as fluid
+from utils.config import cfg
+import contextlib
+
+bn_regularizer = fluid.regularizer.L2DecayRegularizer(regularization_coeff=0.0)
+name_scope = ""
+
+
+@contextlib.contextmanager
+def scope(name):
+    global name_scope
+    bk = name_scope
+    name_scope = name_scope + name + '/'
+    yield
+    name_scope = bk
+
+
+def max_pool(input, kernel, stride, padding):
+    data = fluid.layers.pool2d(
+        input,
+        pool_size=kernel,
+        pool_type='max',
+        pool_stride=stride,
+        pool_padding=padding)
+    return data
+
+
+def avg_pool(input, kernel, stride, padding=0):
+    data = fluid.layers.pool2d(
+        input,
+        pool_size=kernel,
+        pool_type='avg',
+        pool_stride=stride,
+        pool_padding=padding)
+    return data
+
+
+def group_norm(input, G, eps=1e-5, param_attr=None, bias_attr=None):
+    N, C, H, W = input.shape
+    if C % G != 0:
+        # print "group can not divide channle:", C, G
+        for d in range(10):
+            for t in [d, -d]:
+                if G + t <= 0: continue
+                if C % (G + t) == 0:
+                    G = G + t
+                    break
+            if C % G == 0:
+                # print "use group size:", G
+                break
+    assert C % G == 0
+    x = fluid.layers.group_norm(
+        input,
+        groups=G,
+        param_attr=param_attr,
+        bias_attr=bias_attr,
+        name=name_scope + 'group_norm')
+    return x
+
+
+def bn(*args, **kargs):
+    if cfg.MODEL.DEFAULT_NORM_TYPE == 'bn':
+        with scope('BatchNorm'):
+            return fluid.layers.batch_norm(
+                *args,
+                epsilon=cfg.MODEL.DEFAULT_EPSILON,
+                momentum=cfg.MODEL.BN_MOMENTUM,
+                param_attr=fluid.ParamAttr(
+                    name=name_scope + 'gamma', regularizer=bn_regularizer),
+                bias_attr=fluid.ParamAttr(
+                    name=name_scope + 'beta', regularizer=bn_regularizer),
+                moving_mean_name=name_scope + 'moving_mean',
+                moving_variance_name=name_scope + 'moving_variance',
+                **kargs)
+    elif cfg.MODEL.DEFAULT_NORM_TYPE == 'gn':
+        with scope('GroupNorm'):
+            return group_norm(
+                args[0],
+                cfg.MODEL.DEFAULT_GROUP_NUMBER,
+                eps=cfg.MODEL.DEFAULT_EPSILON,
+                param_attr=fluid.ParamAttr(
+                    name=name_scope + 'gamma', regularizer=bn_regularizer),
+                bias_attr=fluid.ParamAttr(
+                    name=name_scope + 'beta', regularizer=bn_regularizer))
+    else:
+        raise Exception("Unsupport norm type:" + cfg.MODEL.DEFAULT_NORM_TYPE)
+
+
+def bn_relu(data):
+    return fluid.layers.relu(bn(data))
+
+
+def relu(data):
+    return fluid.layers.relu(data)
+
+
+def conv(*args, **kargs):
+    kargs['param_attr'] = name_scope + 'weights'
+    if 'bias_attr' in kargs and kargs['bias_attr']:
+        kargs['bias_attr'] = fluid.ParamAttr(
+            name=name_scope + 'biases',
+            regularizer=None,
+            initializer=fluid.initializer.ConstantInitializer(value=0.0))
+    else:
+        kargs['bias_attr'] = False
+    return fluid.layers.conv2d(*args, **kargs)
+
+
+def deconv(*args, **kargs):
+    kargs['param_attr'] = name_scope + 'weights'
+    if 'bias_attr' in kargs and kargs['bias_attr']:
+        kargs['bias_attr'] = name_scope + 'biases'
+    else:
+        kargs['bias_attr'] = False
+    return fluid.layers.conv2d_transpose(*args, **kargs)
+
+
+def separate_conv(input, channel, stride, filter, dilation=1, act=None):
+    param_attr = fluid.ParamAttr(
+        name=name_scope + 'weights',
+        regularizer=fluid.regularizer.L2DecayRegularizer(
+            regularization_coeff=0.0),
+        initializer=fluid.initializer.TruncatedNormal(loc=0.0, scale=0.33))
+    with scope('depthwise'):
+        input = conv(
+            input,
+            input.shape[1],
+            filter,
+            stride,
+            groups=input.shape[1],
+            padding=(filter // 2) * dilation,
+            dilation=dilation,
+            use_cudnn=False,
+            param_attr=param_attr)
+        input = bn(input)
+        if act: input = act(input)
+
+    param_attr = fluid.ParamAttr(
+        name=name_scope + 'weights',
+        regularizer=None,
+        initializer=fluid.initializer.TruncatedNormal(loc=0.0, scale=0.06))
+    with scope('pointwise'):
+        input = conv(
+            input, channel, 1, 1, groups=1, padding=0, param_attr=param_attr)
+        input = bn(input)
+        if act: input = act(input)
+    return input

contrib/LaneNet/models/model_builder.py

+# coding: utf8
+# copyright (c) 2019 PaddlePaddle Authors. All Rights Reserve.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+import sys
+sys.path.append("..")
+import struct
+import importlib
+
+import paddle.fluid as fluid
+from paddle.fluid.proto.framework_pb2 import VarType
+
+import solver
+from utils.config import cfg
+from loss import multi_softmax_with_loss
+from loss import discriminative_loss
+
+class ModelPhase(object):
+    """
+    Standard name for model phase in PaddleSeg
+
+    The following standard keys are defined:
+    * `TRAIN`: training mode.
+    * `EVAL`: testing/evaluation mode.
+    * `PREDICT`: prediction/inference mode.
+    * `VISUAL` : visualization mode
+    """
+
+    TRAIN = 'train'
+    EVAL = 'eval'
+    PREDICT = 'predict'
+    VISUAL = 'visual'
+
+    @staticmethod
+    def is_train(phase):
+        return phase == ModelPhase.TRAIN
+
+    @staticmethod
+    def is_predict(phase):
+        return phase == ModelPhase.PREDICT
+
+    @staticmethod
+    def is_eval(phase):
+        return phase == ModelPhase.EVAL
+
+    @staticmethod
+    def is_visual(phase):
+        return phase == ModelPhase.VISUAL
+
+    @staticmethod
+    def is_valid_phase(phase):
+        """ Check valid phase """
+        if ModelPhase.is_train(phase) or ModelPhase.is_predict(phase) \
+                or ModelPhase.is_eval(phase) or ModelPhase.is_visual(phase):
+            return True
+
+        return False
+
+
+def map_model_name(model_name):
+    name_dict = {
+        "lanenet": "lanenet.lanenet"
+    }
+    if model_name in name_dict.keys():
+        return name_dict[model_name]
+    else:
+        raise Exception(
+            "unknow model name, only support unet, deeplabv3p, icnet")
+
+
+def get_func(func_name):
+    """Helper to return a function object by name. func_name must identify a
+    function in this module or the path to a function relative to the base
+    'modeling' module.
+    """
+    if func_name == '':
+        return None
+    try:
+        parts = func_name.split('.')
+        # Refers to a function in this module
+        if len(parts) == 1:
+            return globals()[parts[0]]
+        # Otherwise, assume we're referencing a module under modeling
+        module_name = 'models.' + '.'.join(parts[:-1])
+        module = importlib.import_module(module_name)
+        return getattr(module, parts[-1])
+    except Exception:
+        print('Failed to find function: {}'.format(func_name))
+    return module
+
+
+def softmax(logit):
+    logit = fluid.layers.transpose(logit, [0, 2, 3, 1])
+    logit = fluid.layers.softmax(logit)
+    logit = fluid.layers.transpose(logit, [0, 3, 1, 2])
+    return logit
+
+def sigmoid_to_softmax(logit):
+    """
+    one channel to two channel
+    """
+    logit = fluid.layers.transpose(logit, [0, 2, 3, 1])
+    logit = fluid.layers.sigmoid(logit)
+    logit_back = 1 - logit
+    logit = fluid.layers.concat([logit_back, logit], axis=-1)
+    logit = fluid.layers.transpose(logit, [0, 3, 1, 2])
+    return logit
+
+
+def build_model(main_prog, start_prog, phase=ModelPhase.TRAIN):
+    if not ModelPhase.is_valid_phase(phase):
+        raise ValueError("ModelPhase {} is not valid!".format(phase))
+    if ModelPhase.is_train(phase):
+        width = cfg.TRAIN_CROP_SIZE[0]
+        height = cfg.TRAIN_CROP_SIZE[1]
+    else:
+        width = cfg.EVAL_CROP_SIZE[0]
+        height = cfg.EVAL_CROP_SIZE[1]
+
+    image_shape = [cfg.DATASET.DATA_DIM, height, width]
+    grt_shape = [1, height, width]
+    class_num = cfg.DATASET.NUM_CLASSES
+
+    with fluid.program_guard(main_prog, start_prog):
+        with fluid.unique_name.guard():
+            image = fluid.layers.data(
+                name='image', shape=image_shape, dtype='float32')
+            label = fluid.layers.data(
+                name='label', shape=grt_shape, dtype='int32')
+            if cfg.MODEL.MODEL_NAME == 'lanenet':
+                label_instance = fluid.layers.data(
+                    name='label_instance', shape=grt_shape, dtype='int32')
+            mask = fluid.layers.data(
+                name='mask', shape=grt_shape, dtype='int32')
+
+            # use PyReader when doing traning and evaluation
+            if ModelPhase.is_train(phase) or ModelPhase.is_eval(phase):
+                py_reader = fluid.io.PyReader(
+                    feed_list=[image, label, label_instance, mask],
+                    capacity=cfg.DATALOADER.BUF_SIZE,
+                    iterable=False,
+                    use_double_buffer=True)
+
+            model_name = map_model_name(cfg.MODEL.MODEL_NAME)
+            model_func = get_func("modeling." + model_name)
+
+            loss_type = cfg.SOLVER.LOSS
+            if not isinstance(loss_type, list):
+                loss_type = list(loss_type)
+            
+            logits = model_func(image, class_num)
+
+            if ModelPhase.is_train(phase):
+                loss_valid = False
+                valid_loss = []
+                if cfg.MODEL.MODEL_NAME == 'lanenet':
+                    embeding_logit = logits[1]
+                    logits = logits[0]
+                    disc_loss, _, _, l_reg = discriminative_loss(embeding_logit, label_instance, 4,
+                                                             image_shape[1:], 0.5, 3.0, 1.0, 1.0, 0.001)
+
+                if "softmax_loss" in loss_type:
+                    if isinstance(cfg.SOLVER.CROSS_ENTROPY_WEIGHT, str) and \
+                            cfg.SOLVER.CROSS_ENTROPY_WEIGHT == 'lanenet':
+                        weight = get_dynamic_weight(label)
+                    else:
+                        weight = cfg.SOLVER.CROSS_ENTROPY_WEIGHT
+                    seg_loss = multi_softmax_with_loss(logits, label, mask, class_num, weight)
+                    loss_valid = True
+                    valid_loss.append("softmax_loss")
+
+                if not loss_valid:
+                    raise Exception("SOLVER.LOSS: {} is set wrong. it should "
+                            "include one of (softmax_loss, bce_loss, dice_loss) at least"
+                            " example: ['softmax_loss']".format(cfg.SOLVER.LOSS))
+
+                invalid_loss = [x for x in loss_type if x not in valid_loss]
+                if len(invalid_loss) > 0:
+                    print("Warning: the loss {} you set is invalid. it will not be included in loss computed.".format(invalid_loss))
+
+                avg_loss = disc_loss + 0.00001 * l_reg + seg_loss
+
+            #get pred result in original size
+            if isinstance(logits, tuple):
+                logit = logits[0]
+            else:
+                logit = logits
+
+            if logit.shape[2:] != label.shape[2:]:
+                logit = fluid.layers.resize_bilinear(logit, label.shape[2:])
+
+            # return image input and logit output for inference graph prune
+            if ModelPhase.is_predict(phase):
+                if class_num == 1:
+                    logit = sigmoid_to_softmax(logit)
+                else:
+                    logit = softmax(logit)
+                return image, logit
+
+            if class_num == 1:
+                out = sigmoid_to_softmax(logit)
+                out = fluid.layers.transpose(out, [0, 2, 3, 1])
+            else:
+                out = fluid.layers.transpose(logit, [0, 2, 3, 1])
+
+            pred = fluid.layers.argmax(out, axis=3)
+            pred = fluid.layers.unsqueeze(pred, axes=[3])
+            if ModelPhase.is_visual(phase):
+                if cfg.MODEL.MODEL_NAME == 'lanenet':
+                    return pred, logits[1]
+                if class_num == 1:
+                    logit = sigmoid_to_softmax(logit)
+                else:
+                    logit = softmax(logit)
+                return pred, logit
+
+            accuracy, fp, fn = compute_metric(pred, label)
+            if ModelPhase.is_eval(phase):
+                return py_reader, pred, label, mask, accuracy, fp, fn
+
+            if ModelPhase.is_train(phase):
+                optimizer = solver.Solver(main_prog, start_prog)
+                decayed_lr = optimizer.optimise(avg_loss)
+                return py_reader, avg_loss, decayed_lr, pred, label, mask, disc_loss, seg_loss, accuracy, fp, fn
+
+
+def compute_metric(pred, label):
+    label = fluid.layers.transpose(label, [0, 2, 3, 1])
+
+    idx = fluid.layers.where(pred == 1)
+    pix_cls_ret = fluid.layers.gather_nd(label, idx)
+
+    correct_num = fluid.layers.reduce_sum(fluid.layers.cast(pix_cls_ret, 'float32'))
+
+    gt_num = fluid.layers.cast(fluid.layers.shape(fluid.layers.gather_nd(label,
+                                                                         fluid.layers.where(label == 1)))[0], 'int64')
+    pred_num = fluid.layers.cast(fluid.layers.shape(fluid.layers.gather_nd(pred, idx))[0], 'int64')
+    accuracy = correct_num / gt_num
+
+    false_pred = pred_num - correct_num
+    fp = fluid.layers.cast(false_pred, 'float32') / fluid.layers.cast(fluid.layers.shape(pix_cls_ret)[0], 'int64')
+
+    label_cls_ret = fluid.layers.gather_nd(label, fluid.layers.where(label == 1))
+    mis_pred = fluid.layers.cast(fluid.layers.shape(label_cls_ret)[0], 'int64') - correct_num
+    fn = fluid.layers.cast(mis_pred, 'float32') / fluid.layers.cast(fluid.layers.shape(label_cls_ret)[0], 'int64')
+    accuracy.stop_gradient = True
+    fp.stop_gradient = True
+    fn.stop_gradient = True
+    return accuracy, fp, fn
+
+
+def get_dynamic_weight(label):
+    label = fluid.layers.reshape(label, [-1])
+    unique_labels, unique_id, counts = fluid.layers.unique_with_counts(label)
+    counts = fluid.layers.cast(counts, 'float32')
+    weight = 1.0 / fluid.layers.log((counts / fluid.layers.reduce_sum(counts) + 1.02))
+    return weight
+
+
+def to_int(string, dest="I"):
+    return struct.unpack(dest, string)[0]
+
+
+def parse_shape_from_file(filename):
+    with open(filename, "rb") as file:
+        version = file.read(4)
+        lod_level = to_int(file.read(8), dest="Q")
+        for i in range(lod_level):
+            _size = to_int(file.read(8), dest="Q")
+            _ = file.read(_size)
+        version = file.read(4)
+        tensor_desc_size = to_int(file.read(4))
+        tensor_desc = VarType.TensorDesc()
+        tensor_desc.ParseFromString(file.read(tensor_desc_size))
+    return tuple(tensor_desc.dims)

contrib/LaneNet/models/modeling/lanenet.py

+# coding: utf8
+# copyright (c) 2019 PaddlePaddle Authors. All Rights Reserve.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from __future__ import division
+from __future__ import print_function
+
+import paddle.fluid as fluid
+
+
+from utils.config import cfg
+from models.libs.model_libs import scope, name_scope
+from models.libs.model_libs import bn, bn_relu, relu
+from models.libs.model_libs import conv, max_pool, deconv
+from models.backbone.vgg import VGGNet as vgg_backbone
+
+# Bottleneck type
+REGULAR = 1
+DOWNSAMPLING = 2
+UPSAMPLING = 3
+DILATED = 4
+ASYMMETRIC = 5
+
+
+def prelu(x, decoder=False):
+    # If decoder, then perform relu else perform prelu
+    if decoder:
+        return fluid.layers.relu(x)
+    return fluid.layers.prelu(x, 'channel')
+
+
+def iniatial_block(inputs, name_scope='iniatial_block'):
+    '''
+    The initial block for Enet has 2 branches: The convolution branch and Maxpool branch.
+    The conv branch has 13 filters, while the maxpool branch gives 3 channels corresponding to the RGB channels.
+    Both output layers are then concatenated to give an output of 16 channels.
+
+    :param inputs(Tensor): A 4D tensor of shape [batch_size, height, width, channels]
+    :return net_concatenated(Tensor): a 4D Tensor of new shape [batch_size, height, width, channels]
+    '''
+    # Convolutional branch
+    with scope(name_scope):
+        net_conv = conv(inputs, 13, 3, stride=2, padding=1)
+        net_conv = bn(net_conv)
+        net_conv = fluid.layers.prelu(net_conv, 'channel')
+
+        # Max pool branch
+        net_pool = max_pool(inputs, [2, 2], stride=2, padding='SAME')
+
+        # Concatenated output - does it matter max pool comes first or conv comes first? probably not.
+        net_concatenated = fluid.layers.concat([net_conv, net_pool], axis=1)
+    return net_concatenated
+
+
+def bottleneck(inputs,
+               output_depth,
+               filter_size,
+               regularizer_prob,
+               projection_ratio=4,
+               type=REGULAR,
+               seed=0,
+               output_shape=None,
+               dilation_rate=None,
+               decoder=False,
+               name_scope='bottleneck'):
+
+    # Calculate the depth reduction based on the projection ratio used in 1x1 convolution.
+    reduced_depth = int(inputs.shape[1] / projection_ratio)
+
+    # DOWNSAMPLING BOTTLENECK
+    if type == DOWNSAMPLING:
+        #=============MAIN BRANCH=============
+        #Just perform a max pooling
+        with scope('down_sample'):
+            inputs_shape = inputs.shape
+            with scope('main_max_pool'):
+                net_main = fluid.layers.conv2d(inputs, inputs_shape[1], filter_size=3, stride=2, padding='SAME')
+
+            #First get the difference in depth to pad, then pad with zeros only on the last dimension.
+            depth_to_pad = abs(inputs_shape[1] - output_depth)
+            paddings = [0, 0, 0, depth_to_pad, 0, 0, 0, 0]
+            with scope('main_padding'):
+                net_main = fluid.layers.pad(net_main, paddings=paddings)
+
+            with scope('block1'):
+                net = conv(inputs, reduced_depth, [2, 2], stride=2, padding='same')
+                net = bn(net)
+                net = prelu(net, decoder=decoder)
+
+            with scope('block2'):
+                net = conv(net, reduced_depth, [filter_size, filter_size], padding='same')
+                net = bn(net)
+                net = prelu(net, decoder=decoder)
+
+            with scope('block3'):
+                net = conv(net, output_depth, [1, 1], padding='same')
+                net = bn(net)
+                net = prelu(net, decoder=decoder)
+
+            # Regularizer
+            net = fluid.layers.dropout(net, regularizer_prob, seed=seed)
+
+            # Finally, combine the two branches together via an element-wise addition
+            net = fluid.layers.elementwise_add(net, net_main)
+            net = prelu(net, decoder=decoder)
+
+        return net, inputs_shape
+
+    # DILATION CONVOLUTION BOTTLENECK
+    # Everything is the same as a regular bottleneck except for the dilation rate argument
+    elif type == DILATED:
+        #Check if dilation rate is given
+        if not dilation_rate:
+            raise ValueError('Dilation rate is not given.')
+
+        with scope('dilated'):
+            # Save the main branch for addition later
+            net_main = inputs
+
+            # First projection with 1x1 kernel (dimensionality reduction)
+            with scope('block1'):
+                net = conv(inputs, reduced_depth, [1, 1])
+                net = bn(net)
+                net = prelu(net, decoder=decoder)
+
+            # Second conv block --- apply dilated convolution here
+            with scope('block2'):
+                net = conv(net, reduced_depth, filter_size, padding='SAME', dilation=dilation_rate)
+                net = bn(net)
+                net = prelu(net, decoder=decoder)
+
+            # Final projection with 1x1 kernel (Expansion)
+            with scope('block3'):
+                net = conv(net, output_depth, [1,1])
+                net = bn(net)
+                net = prelu(net, decoder=decoder)
+
+            # Regularizer
+            net = fluid.layers.dropout(net, regularizer_prob, seed=seed)
+            net = prelu(net, decoder=decoder)
+
+            # Add the main branch
+            net = fluid.layers.elementwise_add(net_main, net)
+            net = prelu(net, decoder=decoder)
+
+        return net
+
+    # ASYMMETRIC CONVOLUTION BOTTLENECK
+    # Everything is the same as a regular bottleneck except for a [5,5] kernel decomposed into two [5,1] then [1,5]
+    elif type == ASYMMETRIC:
+        # Save the main branch for addition later
+        with scope('asymmetric'):
+            net_main = inputs
+            # First projection with 1x1 kernel (dimensionality reduction)
+            with scope('block1'):
+                net = conv(inputs, reduced_depth, [1, 1])
+                net = bn(net)
+                net = prelu(net, decoder=decoder)
+
+            # Second conv block --- apply asymmetric conv here
+            with scope('block2'):
+                with scope('asymmetric_conv2a'):
+                    net = conv(net, reduced_depth, [filter_size, 1], padding='same')
+                with scope('asymmetric_conv2b'):
+                    net = conv(net, reduced_depth, [1, filter_size], padding='same')
+                net = bn(net)
+                net = prelu(net, decoder=decoder)
+
+            # Final projection with 1x1 kernel
+            with scope('block3'):
+                net = conv(net, output_depth, [1, 1])
+                net = bn(net)
+                net = prelu(net, decoder=decoder)
+
+            # Regularizer
+            net = fluid.layers.dropout(net, regularizer_prob, seed=seed)
+            net = prelu(net, decoder=decoder)
+
+            # Add the main branch
+            net = fluid.layers.elementwise_add(net_main, net)
+            net = prelu(net, decoder=decoder)
+
+        return net
+
+    # UPSAMPLING BOTTLENECK
+    # Everything is the same as a regular one, except convolution becomes transposed.
+    elif type == UPSAMPLING:
+        #Check if pooling indices is given
+
+        #Check output_shape given or not
+        if output_shape is None:
+            raise ValueError('Output depth is not given')
+
+        #=======MAIN BRANCH=======
+        #Main branch to upsample. output shape must match with the shape of the layer that was pooled initially, in order
+        #for the pooling indices to work correctly. However, the initial pooled layer was padded, so need to reduce dimension
+        #before unpooling. In the paper, padding is replaced with convolution for this purpose of reducing the depth!
+        with scope('upsampling'):
+            with scope('unpool'):
+                net_unpool = conv(inputs, output_depth, [1, 1])
+                net_unpool = bn(net_unpool)
+                net_unpool = fluid.layers.resize_bilinear(net_unpool, out_shape=output_shape[2:])
+
+            # First 1x1 projection to reduce depth
+            with scope('block1'):
+                net = conv(inputs, reduced_depth, [1, 1])
+                net = bn(net)
+                net = prelu(net, decoder=decoder)
+
+            with scope('block2'):
+                net = deconv(net, reduced_depth, filter_size=filter_size, stride=2, padding='same')
+                net = bn(net)
+                net = prelu(net, decoder=decoder)
+
+            # Final projection with 1x1 kernel
+            with scope('block3'):
+                net = conv(net, output_depth, [1, 1])
+                net = bn(net)
+                net = prelu(net, decoder=decoder)
+
+            # Regularizer
+            net = fluid.layers.dropout(net, regularizer_prob, seed=seed)
+            net = prelu(net, decoder=decoder)
+
+            # Finally, add the unpooling layer and the sub branch together
+            net = fluid.layers.elementwise_add(net, net_unpool)
+            net = prelu(net, decoder=decoder)
+
+        return net
+
+    # REGULAR BOTTLENECK
+    else:
+        with scope('regular'):
+            net_main = inputs
+
+            # First projection with 1x1 kernel
+            with scope('block1'):
+                net = conv(inputs, reduced_depth, [1, 1])
+                net = bn(net)
+                net = prelu(net, decoder=decoder)
+
+            # Second conv block
+            with scope('block2'):
+                net = conv(net, reduced_depth, [filter_size, filter_size], padding='same')
+                net = bn(net)
+                net = prelu(net, decoder=decoder)
+
+            # Final projection with 1x1 kernel
+            with scope('block3'):
+                net = conv(net, output_depth, [1, 1])
+                net = bn(net)
+                net = prelu(net, decoder=decoder)
+
+            # Regularizer
+            net = fluid.layers.dropout(net, regularizer_prob, seed=seed)
+            net = prelu(net, decoder=decoder)
+
+            # Add the main branch
+            net = fluid.layers.elementwise_add(net_main, net)
+            net = prelu(net, decoder=decoder)
+
+        return net
+
+
+def ENet_stage1(inputs, name_scope='stage1_block'):
+    with scope(name_scope):
+        with scope('bottleneck1_0'):
+            net, inputs_shape_1 \
+              = bottleneck(inputs, output_depth=64, filter_size=3, regularizer_prob=0.01, type=DOWNSAMPLING,
+                           name_scope='bottleneck1_0')
+        with scope('bottleneck1_1'):
+            net = bottleneck(net, output_depth=64, filter_size=3, regularizer_prob=0.01,
+                             name_scope='bottleneck1_1')
+        with scope('bottleneck1_2'):
+            net = bottleneck(net, output_depth=64, filter_size=3, regularizer_prob=0.01,
+                             name_scope='bottleneck1_2')
+        with scope('bottleneck1_3'):
+            net = bottleneck(net, output_depth=64, filter_size=3, regularizer_prob=0.01,
+                             name_scope='bottleneck1_3')
+        with scope('bottleneck1_4'):
+            net = bottleneck(net, output_depth=64, filter_size=3, regularizer_prob=0.01,
+                             name_scope='bottleneck1_4')
+    return net, inputs_shape_1
+
+
+def ENet_stage2(inputs, name_scope='stage2_block'):
+    with scope(name_scope):
+        net, inputs_shape_2 \
+          = bottleneck(inputs, output_depth=128, filter_size=3, regularizer_prob=0.1, type=DOWNSAMPLING,
+                       name_scope='bottleneck2_0')
+        for i in range(2):
+            with scope('bottleneck2_{}'.format(str(4 * i + 1))):
+                net = bottleneck(net, output_depth=128, filter_size=3, regularizer_prob=0.1,
+                                 name_scope='bottleneck2_{}'.format(str(4 * i + 1)))
+            with scope('bottleneck2_{}'.format(str(4 * i + 2))):
+                net = bottleneck(net, output_depth=128, filter_size=3, regularizer_prob=0.1, type=DILATED, dilation_rate=(2 ** (2*i+1)),
+                                 name_scope='bottleneck2_{}'.format(str(4 * i + 2)))
+            with scope('bottleneck2_{}'.format(str(4 * i + 3))):
+                net = bottleneck(net, output_depth=128, filter_size=5, regularizer_prob=0.1, type=ASYMMETRIC,
+                                 name_scope='bottleneck2_{}'.format(str(4 * i + 3)))
+            with scope('bottleneck2_{}'.format(str(4 * i + 4))):
+                net = bottleneck(net, output_depth=128, filter_size=3, regularizer_prob=0.1, type=DILATED, dilation_rate=(2 ** (2*i+2)),
+                                 name_scope='bottleneck2_{}'.format(str(4 * i + 4)))
+    return net, inputs_shape_2
+
+
+def ENet_stage3(inputs, name_scope='stage3_block'):
+    with scope(name_scope):
+        for i in range(2):
+            with scope('bottleneck3_{}'.format(str(4 * i + 0))):
+                net = bottleneck(inputs, output_depth=128, filter_size=3, regularizer_prob=0.1,
+                                 name_scope='bottleneck3_{}'.format(str(4 * i + 0)))
+            with scope('bottleneck3_{}'.format(str(4 * i + 1))):
+                net = bottleneck(net, output_depth=128, filter_size=3, regularizer_prob=0.1, type=DILATED, dilation_rate=(2 ** (2*i+1)),
+                                 name_scope='bottleneck3_{}'.format(str(4 * i + 1)))
+            with scope('bottleneck3_{}'.format(str(4 * i + 2))):
+                net = bottleneck(net, output_depth=128, filter_size=5, regularizer_prob=0.1, type=ASYMMETRIC,
+                                 name_scope='bottleneck3_{}'.format(str(4 * i + 2)))
+            with scope('bottleneck3_{}'.format(str(4 * i + 3))):
+                net = bottleneck(net, output_depth=128, filter_size=3, regularizer_prob=0.1, type=DILATED, dilation_rate=(2 ** (2*i+2)),
+                                 name_scope='bottleneck3_{}'.format(str(4 * i + 3)))
+    return net
+
+
+def ENet_stage4(inputs, inputs_shape, connect_tensor,
+                skip_connections=True, name_scope='stage4_block'):
+    with scope(name_scope):
+        with scope('bottleneck4_0'):
+            net = bottleneck(inputs, output_depth=64, filter_size=3, regularizer_prob=0.1,
+                             type=UPSAMPLING, decoder=True, output_shape=inputs_shape,
+                             name_scope='bottleneck4_0')
+
+        if skip_connections:
+            net = fluid.layers.elementwise_add(net, connect_tensor)
+        with scope('bottleneck4_1'):
+            net = bottleneck(net, output_depth=64, filter_size=3, regularizer_prob=0.1, decoder=True,
+                             name_scope='bottleneck4_1')
+        with scope('bottleneck4_2'):
+            net = bottleneck(net, output_depth=64, filter_size=3, regularizer_prob=0.1, decoder=True,
+                             name_scope='bottleneck4_2')
+
+    return net
+
+
+def ENet_stage5(inputs, inputs_shape, connect_tensor, skip_connections=True,
+                name_scope='stage5_block'):
+    with scope(name_scope):
+        net = bottleneck(inputs, output_depth=16, filter_size=3, regularizer_prob=0.1, type=UPSAMPLING,
+                         decoder=True, output_shape=inputs_shape,
+                         name_scope='bottleneck5_0')
+
+        if skip_connections:
+            net = fluid.layers.elementwise_add(net, connect_tensor)
+        with scope('bottleneck5_1'):
+            net = bottleneck(net, output_depth=16, filter_size=3, regularizer_prob=0.1, decoder=True,
+                             name_scope='bottleneck5_1')
+    return net
+
+
+def decoder(input, num_classes):
+
+    if 'enet' in cfg.MODEL.LANENET.BACKBONE:
+        # Segmentation branch
+        with scope('LaneNetSeg'):
+            initial, stage1, stage2, inputs_shape_1, inputs_shape_2 = input
+            segStage3 = ENet_stage3(stage2)
+            segStage4 = ENet_stage4(segStage3, inputs_shape_2, stage1)
+            segStage5 = ENet_stage5(segStage4, inputs_shape_1, initial)
+            segLogits = deconv(segStage5, num_classes, filter_size=2, stride=2, padding='SAME')
+
+        # Embedding branch
+        with scope('LaneNetEm'):
+            emStage3 = ENet_stage3(stage2)
+            emStage4 = ENet_stage4(emStage3, inputs_shape_2, stage1)
+            emStage5 = ENet_stage5(emStage4, inputs_shape_1, initial)
+            emLogits = deconv(emStage5, 4, filter_size=2, stride=2, padding='SAME')
+
+    elif 'vgg' in cfg.MODEL.LANENET.BACKBONE:
+        encoder_list = ['pool5', 'pool4', 'pool3']
+        # score stage
+        input_tensor = input[encoder_list[0]]
+        with scope('score_origin'):
+            score = conv(input_tensor, 64, 1)
+        encoder_list = encoder_list[1:]
+        for i in range(len(encoder_list)):
+            with scope('deconv_{:d}'.format(i + 1)):
+                deconv_out = deconv(score, 64, filter_size=4, stride=2, padding='SAME')
+            input_tensor = input[encoder_list[i]]
+            with scope('score_{:d}'.format(i + 1)):
+                score = conv(input_tensor, 64, 1)
+            score = fluid.layers.elementwise_add(deconv_out, score)
+
+        with scope('deconv_final'):
+            emLogits = deconv(score, 64, filter_size=16, stride=8, padding='SAME')
+        with scope('score_final'):
+            segLogits = conv(emLogits, num_classes, 1)
+        emLogits = relu(conv(emLogits, 4, 1))
+    return segLogits, emLogits
+
+
+def encoder(input):
+    if 'vgg' in cfg.MODEL.LANENET.BACKBONE:
+        model = vgg_backbone(layers=16)
+        output = model.net(input)
+    elif 'enet' in cfg.MODEL.LANET.BACKBONE:
+        with scope('LaneNetBase'):
+            initial = iniatial_block(input)
+            stage1, inputs_shape_1 = ENet_stage1(initial)
+            stage2, inputs_shape_2 = ENet_stage2(stage1)
+            output = (initial, stage1, stage2, inputs_shape_1, inputs_shape_2)
+    else:
+        raise Exception("LaneNet expect enet and vgg backbone, but received {}".
+                        format(cfg.MODEL.LANENET.BACKBONE))
+    return output
+
+
+def lanenet(img, num_classes):
+
+    output = encoder(img)
+    segLogits, emLogits = decoder(output, num_classes)
+
+    return segLogits, emLogits

contrib/LaneNet/reader.py

+# coding: utf8
+# copyright (c) 2019 PaddlePaddle Authors. All Rights Reserve.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from __future__ import print_function
+import sys
+import os
+import time
+import codecs
+
+import numpy as np
+import cv2
+
+import data_aug as aug
+from utils.config import cfg
+from pdseg.data_utils import GeneratorEnqueuer
+from models.model_builder import ModelPhase
+import copy
+
+def cv2_imread(file_path, flag=cv2.IMREAD_COLOR):
+    # resolve cv2.imread open Chinese file path issues on Windows Platform.
+    return cv2.imdecode(np.fromfile(file_path, dtype=np.uint8), flag)
+
+
+class SegDataset(object):
+    def __init__(self,
+                 file_list,
+                 data_dir,
+                 shuffle=False,
+                 mode=ModelPhase.TRAIN):
+        self.mode = mode
+        self.shuffle = shuffle
+        self.data_dir = data_dir
+
+        self.shuffle_seed = 0
+        # NOTE: Please ensure file list was save in UTF-8 coding format
+        with codecs.open(file_list, 'r', 'utf-8') as flist:
+            self.lines = [line.strip() for line in flist]
+            self.all_lines = copy.deepcopy(self.lines)
+            if shuffle and cfg.NUM_TRAINERS > 1:
+                np.random.RandomState(self.shuffle_seed).shuffle(self.all_lines)
+            elif shuffle:
+                np.random.shuffle(self.lines)
+
+    def generator(self):
+        if self.shuffle and cfg.NUM_TRAINERS > 1:
+            np.random.RandomState(self.shuffle_seed).shuffle(self.all_lines)
+            num_lines = len(self.all_lines) // cfg.NUM_TRAINERS
+            self.lines = self.all_lines[num_lines * cfg.TRAINER_ID: num_lines * (cfg.TRAINER_ID + 1)]
+            self.shuffle_seed += 1
+        elif self.shuffle:
+            np.random.shuffle(self.lines)
+
+        for line in self.lines:
+            yield self.process_image(line, self.data_dir, self.mode)
+
+    def sharding_generator(self, pid=0, num_processes=1):
+        """
+        Use line id as shard key for multiprocess io
+        It's a normal generator if pid=0, num_processes=1
+        """
+        for index, line in enumerate(self.lines):
+            # Use index and pid to shard file list
+            if index % num_processes == pid:
+                yield self.process_image(line, self.data_dir, self.mode)
+
+    def batch_reader(self, batch_size):
+        br = self.batch(self.reader, batch_size)
+        for batch in br:
+            yield batch[0], batch[1], batch[2]
+
+    def multiprocess_generator(self, max_queue_size=32, num_processes=8):
+        # Re-shuffle file list
+        if self.shuffle and cfg.NUM_TRAINERS > 1:
+            np.random.RandomState(self.shuffle_seed).shuffle(self.all_lines)
+            num_lines = len(self.all_lines) // self.num_trainers
+            self.lines = self.all_lines[num_lines * self.trainer_id: num_lines * (self.trainer_id + 1)]
+            self.shuffle_seed += 1
+        elif self.shuffle:
+            np.random.shuffle(self.lines)
+
+        # Create multiple sharding generators according to num_processes for multiple processes
+        generators = []
+        for pid in range(num_processes):
+            generators.append(self.sharding_generator(pid, num_processes))
+
+        try:
+            enqueuer = GeneratorEnqueuer(generators)
+            enqueuer.start(max_queue_size=max_queue_size, workers=num_processes)
+            while True:
+                generator_out = None
+                while enqueuer.is_running():
+                    if not enqueuer.queue.empty():
+                        generator_out = enqueuer.queue.get(timeout=5)
+                        break
+                    else:
+                        time.sleep(0.01)
+                if generator_out is None:
+                    break
+                yield generator_out
+        finally:
+            if enqueuer is not None:
+                enqueuer.stop()
+
+    def batch(self, reader, batch_size, is_test=False, drop_last=False):
+        def batch_reader(is_test=False, drop_last=drop_last):
+            if is_test:
+                imgs, grts, img_names, valid_shapes, org_shapes = [], [], [], [], []
+                for img, grt, img_name, valid_shape, org_shape in reader():
+                    imgs.append(img)
+                    grts.append(grt)
+                    img_names.append(img_name)
+                    valid_shapes.append(valid_shape)
+                    org_shapes.append(org_shape)
+                    if len(imgs) == batch_size:
+                        yield np.array(imgs), np.array(
+                            grts), img_names, np.array(valid_shapes), np.array(
+                                org_shapes)
+                        imgs, grts, img_names, valid_shapes, org_shapes = [], [], [], [], []
+
+                if not drop_last and len(imgs) > 0:
+                    yield np.array(imgs), np.array(grts), img_names, np.array(
+                        valid_shapes), np.array(org_shapes)
+            else:
+                imgs, labs, ignore = [], [], []
+                bs = 0
+                for img, lab, ig in reader():
+                    imgs.append(img)
+                    labs.append(lab)
+                    ignore.append(ig)
+                    bs += 1
+                    if bs == batch_size:
+                        yield np.array(imgs), np.array(labs), np.array(ignore)
+                        bs = 0
+                        imgs, labs, ignore = [], [], []
+
+                if not drop_last and bs > 0:
+                    yield np.array(imgs), np.array(labs), np.array(ignore)
+
+        return batch_reader(is_test, drop_last)
+
+    def load_image(self, line, src_dir, mode=ModelPhase.TRAIN):
+        # original image cv2.imread flag setting
+        cv2_imread_flag = cv2.IMREAD_COLOR
+        if cfg.DATASET.IMAGE_TYPE == "rgba":
+            # If use RBGA 4 channel ImageType, use IMREAD_UNCHANGED flags to
+            # reserver alpha channel
+            cv2_imread_flag = cv2.IMREAD_UNCHANGED
+
+        parts = line.strip().split(cfg.DATASET.SEPARATOR)
+        if len(parts) != 2:
+            if mode == ModelPhase.TRAIN or mode == ModelPhase.EVAL:
+                raise Exception("File list format incorrect! It should be"
+                                " image_name{}label_name\\n".format(
+                                    cfg.DATASET.SEPARATOR))
+            img_name, grt_name = parts[0], None
+        else:
+            img_name, grt_name = parts[0], parts[1]
+
+        img_path = os.path.join(src_dir, img_name)
+        img = cv2_imread(img_path, cv2_imread_flag)
+
+        if grt_name is not None:
+            grt_path = os.path.join(src_dir, grt_name)
+            grt = cv2_imread(grt_path, cv2.IMREAD_GRAYSCALE)
+        else:
+            grt = None
+
+        if img is None:
+            raise Exception(
+                "Empty image, src_dir: {}, img: {} & lab: {}".format(
+                    src_dir, img_path, grt_path))
+
+        img_height = img.shape[0]
+        img_width = img.shape[1]
+
+        if grt is not None:
+            grt_height = grt.shape[0]
+            grt_width = grt.shape[1]
+
+            if img_height != grt_height or img_width != grt_width:
+                raise Exception(
+                    "source img and label img must has the same size")
+        else:
+            if mode == ModelPhase.TRAIN or mode == ModelPhase.EVAL:
+                raise Exception(
+                    "Empty image, src_dir: {}, img: {} & lab: {}".format(
+                        src_dir, img_path, grt_path))
+
+        if len(img.shape) < 3:
+            img = cv2.cvtColor(img, cv2.COLOR_GRAY2BGR)
+
+        img_channels = img.shape[2]
+        if img_channels < 3:
+            raise Exception("PaddleSeg only supports gray, rgb or rgba image")
+        if img_channels != cfg.DATASET.DATA_DIM:
+            raise Exception(
+                "Input image channel({}) is not match cfg.DATASET.DATA_DIM({}), img_name={}"
+                .format(img_channels, cfg.DATASET.DATADIM, img_name))
+        if img_channels != len(cfg.MEAN):
+            raise Exception(
+                "img name {}, img chns {} mean size {}, size unequal".format(
+                    img_name, img_channels, len(cfg.MEAN)))
+        if img_channels != len(cfg.STD):
+            raise Exception(
+                "img name {}, img chns {} std size {}, size unequal".format(
+                    img_name, img_channels, len(cfg.STD)))
+
+        return img, grt, img_name, grt_name
+
+    def normalize_image(self, img):
+        """ 像素归一化后减均值除方差 """
+        img = img.transpose((2, 0, 1)).astype('float32') / 255.0
+        img_mean = np.array(cfg.MEAN).reshape((len(cfg.MEAN), 1, 1))
+        img_std = np.array(cfg.STD).reshape((len(cfg.STD), 1, 1))
+        img -= img_mean
+        img /= img_std
+
+        return img
+
+    def process_image(self, line, data_dir, mode):
+        """ process_image """
+        img, grt, grt_instance, img_name, grt_name = self.load_image(
+            line, data_dir, mode=mode)
+        if mode == ModelPhase.TRAIN:
+            img, grt = aug.resize(img, grt, mode)
+            if cfg.AUG.RICH_CROP.ENABLE:
+                if cfg.AUG.RICH_CROP.BLUR:
+                    if cfg.AUG.RICH_CROP.BLUR_RATIO <= 0:
+                        n = 0
+                    elif cfg.AUG.RICH_CROP.BLUR_RATIO >= 1:
+                        n = 1
+                    else:
+                        n = int(1.0 / cfg.AUG.RICH_CROP.BLUR_RATIO)
+                    if n > 0:
+                        if np.random.randint(0, n) == 0:
+                            radius = np.random.randint(3, 10)
+                            if radius % 2 != 1:
+                                radius = radius + 1
+                            if radius > 9:
+                                radius = 9
+                            img = cv2.GaussianBlur(img, (radius, radius), 0, 0)
+
+                img, grt = aug.random_rotation(
+                    img,
+                    grt,
+                    rich_crop_max_rotation=cfg.AUG.RICH_CROP.MAX_ROTATION,
+                    mean_value=cfg.DATASET.PADDING_VALUE)
+
+                img, grt = aug.rand_scale_aspect(
+                    img,
+                    grt,
+                    rich_crop_min_scale=cfg.AUG.RICH_CROP.MIN_AREA_RATIO,
+                    rich_crop_aspect_ratio=cfg.AUG.RICH_CROP.ASPECT_RATIO)
+                img = aug.hsv_color_jitter(
+                    img,
+                    brightness_jitter_ratio=cfg.AUG.RICH_CROP.
+                    BRIGHTNESS_JITTER_RATIO,
+                    saturation_jitter_ratio=cfg.AUG.RICH_CROP.
+                    SATURATION_JITTER_RATIO,
+                    contrast_jitter_ratio=cfg.AUG.RICH_CROP.
+                    CONTRAST_JITTER_RATIO)
+
+            if cfg.AUG.FLIP:
+                if cfg.AUG.FLIP_RATIO <= 0:
+                    n = 0
+                elif cfg.AUG.FLIP_RATIO >= 1:
+                    n = 1
+                else:
+                    n = int(1.0 / cfg.AUG.FLIP_RATIO)
+                if n > 0:
+                    if np.random.randint(0, n) == 0:
+                        img = img[::-1, :, :]
+                        grt = grt[::-1, :]
+
+            if cfg.AUG.MIRROR:
+                if np.random.randint(0, 2) == 1:
+                    img = img[:, ::-1, :]
+                    grt = grt[:, ::-1]
+
+            img, grt = aug.rand_crop(img, grt, mode=mode)
+        elif ModelPhase.is_eval(mode):
+            img, grt = aug.resize(img, grt, mode=mode)
+            img, grt = aug.rand_crop(img, grt, mode=mode)
+        elif ModelPhase.is_visual(mode):
+            org_shape = [img.shape[0], img.shape[1]]
+            img, grt = aug.resize(img, grt, mode=mode)
+            valid_shape = [img.shape[0], img.shape[1]]
+            img, grt = aug.rand_crop(img, grt, mode=mode)
+        else:
+            raise ValueError("Dataset mode={} Error!".format(mode))
+
+        # Normalize image
+        img = self.normalize_image(img)
+
+        if ModelPhase.is_train(mode) or ModelPhase.is_eval(mode):
+            grt = np.expand_dims(np.array(grt).astype('int32'), axis=0)
+            ignore = (grt != cfg.DATASET.IGNORE_INDEX).astype('int32')
+
+        if ModelPhase.is_train(mode):
+            return (img, grt, ignore)
+        elif ModelPhase.is_eval(mode):
+            return (img, grt, ignore)
+        elif ModelPhase.is_visual(mode):
+            return (img, grt, img_name, valid_shape, org_shape)
+
+
+class LaneNetDataset(SegDataset):
+    def __init__(self,
+                 file_list,
+                 data_dir,
+                 shuffle=False,
+                 mode=ModelPhase.TRAIN):
+        self.mode = mode
+        self.shuffle = shuffle
+        self.data_dir = data_dir
+
+        self.shuffle_seed = 0
+        # NOTE: Please ensure file list was save in UTF-8 coding format
+        with codecs.open(file_list, 'r', 'utf-8') as flist:
+            self.lines = [line.strip() for line in flist]
+            self.all_lines = copy.deepcopy(self.lines)
+            if shuffle and cfg.NUM_TRAINERS > 1:
+                np.random.RandomState(self.shuffle_seed).shuffle(self.all_lines)
+            elif shuffle:
+                np.random.shuffle(self.lines)
+
+    def generator(self):
+        if self.shuffle and cfg.NUM_TRAINERS > 1:
+            np.random.RandomState(self.shuffle_seed).shuffle(self.all_lines)
+            num_lines = len(self.all_lines) // cfg.NUM_TRAINERS
+            self.lines = self.all_lines[num_lines * cfg.TRAINER_ID: num_lines * (cfg.TRAINER_ID + 1)]
+            self.shuffle_seed += 1
+        elif self.shuffle:
+            np.random.shuffle(self.lines)
+
+        for line in self.lines:
+            yield self.process_image(line, self.data_dir, self.mode)
+
+    def sharding_generator(self, pid=0, num_processes=1):
+        """
+        Use line id as shard key for multiprocess io
+        It's a normal generator if pid=0, num_processes=1
+        """
+        for index, line in enumerate(self.lines):
+            # Use index and pid to shard file list
+            if index % num_processes == pid:
+                yield self.process_image(line, self.data_dir, self.mode)
+
+    def batch_reader(self, batch_size):
+        br = self.batch(self.reader, batch_size)
+        for batch in br:
+            yield batch[0], batch[1], batch[2]
+
+    def multiprocess_generator(self, max_queue_size=32, num_processes=8):
+        # Re-shuffle file list
+        if self.shuffle and cfg.NUM_TRAINERS > 1:
+            np.random.RandomState(self.shuffle_seed).shuffle(self.all_lines)
+            num_lines = len(self.all_lines) // self.num_trainers
+            self.lines = self.all_lines[num_lines * self.trainer_id: num_lines * (self.trainer_id + 1)]
+            self.shuffle_seed += 1
+        elif self.shuffle:
+            np.random.shuffle(self.lines)
+
+        # Create multiple sharding generators according to num_processes for multiple processes
+        generators = []
+        for pid in range(num_processes):
+            generators.append(self.sharding_generator(pid, num_processes))
+
+        try:
+            enqueuer = GeneratorEnqueuer(generators)
+            enqueuer.start(max_queue_size=max_queue_size, workers=num_processes)
+            while True:
+                generator_out = None
+                while enqueuer.is_running():
+                    if not enqueuer.queue.empty():
+                        generator_out = enqueuer.queue.get(timeout=5)
+                        break
+                    else:
+                        time.sleep(0.01)
+                if generator_out is None:
+                    break
+                yield generator_out
+        finally:
+            if enqueuer is not None:
+                enqueuer.stop()
+
+    def batch(self, reader, batch_size, is_test=False, drop_last=False):
+        def batch_reader(is_test=False, drop_last=drop_last):
+            if is_test:
+                imgs, grts, grts_instance, img_names, valid_shapes, org_shapes = [], [], [], [], [], []
+                for img, grt, grt_instance, img_name, valid_shape, org_shape in reader():
+                    imgs.append(img)
+                    grts.append(grt)
+                    grts_instance.append(grt_instance)
+                    img_names.append(img_name)
+                    valid_shapes.append(valid_shape)
+                    org_shapes.append(org_shape)
+                    if len(imgs) == batch_size:
+                        yield np.array(imgs), np.array(
+                            grts), np.array(grts_instance), img_names, np.array(valid_shapes), np.array(
+                                org_shapes)
+                        imgs, grts, grts_instance, img_names, valid_shapes, org_shapes = [], [], [], [], [], []
+
+                if not drop_last and len(imgs) > 0:
+                    yield np.array(imgs), np.array(grts), np.array(grts_instance), img_names, np.array(
+                        valid_shapes), np.array(org_shapes)
+            else:
+                imgs, labs, labs_instance, ignore = [], [], [], []
+                bs = 0
+                for img, lab, lab_instance, ig in reader():
+                    imgs.append(img)
+                    labs.append(lab)
+                    labs_instance.append(lab_instance)
+                    ignore.append(ig)
+                    bs += 1
+                    if bs == batch_size:
+                        yield np.array(imgs), np.array(labs), np.array(labs_instance), np.array(ignore)
+                        bs = 0
+                        imgs, labs, labs_instance, ignore = [], [], [], []
+
+                if not drop_last and bs > 0:
+                    yield np.array(imgs), np.array(labs), np.array(labs_instance), np.array(ignore)
+
+        return batch_reader(is_test, drop_last)
+
+    def load_image(self, line, src_dir, mode=ModelPhase.TRAIN):
+        # original image cv2.imread flag setting
+        cv2_imread_flag = cv2.IMREAD_COLOR
+        if cfg.DATASET.IMAGE_TYPE == "rgba":
+            # If use RBGA 4 channel ImageType, use IMREAD_UNCHANGED flags to
+            # reserver alpha channel
+            cv2_imread_flag = cv2.IMREAD_UNCHANGED
+
+        parts = line.strip().split(cfg.DATASET.SEPARATOR)
+        if len(parts) != 3:
+            if mode == ModelPhase.TRAIN or mode == ModelPhase.EVAL:
+                raise Exception("File list format incorrect! It should be"
+                                " image_name{}label_name\\n".format(
+                                    cfg.DATASET.SEPARATOR))
+            img_name, grt_name, grt_instance_name = parts[0], None, None
+        else:
+            img_name, grt_name, grt_instance_name = parts[0], parts[1], parts[2]
+
+        img_path = os.path.join(src_dir, img_name)
+        img = cv2_imread(img_path, cv2_imread_flag)
+
+        if grt_name is not None:
+            grt_path = os.path.join(src_dir, grt_name)
+            grt_instance_path = os.path.join(src_dir, grt_instance_name)
+            grt = cv2_imread(grt_path, cv2.IMREAD_GRAYSCALE)
+            grt[grt == 255] = 1
+            grt[grt != 1] = 0
+            grt_instance = cv2_imread(grt_instance_path, cv2.IMREAD_GRAYSCALE)
+        else:
+            grt = None
+            grt_instance = None
+
+        if img is None:
+            raise Exception(
+                "Empty image, src_dir: {}, img: {} & lab: {}".format(
+                    src_dir, img_path, grt_path))
+
+        img_height = img.shape[0]
+        img_width = img.shape[1]
+
+        if grt is not None:
+            grt_height = grt.shape[0]
+            grt_width = grt.shape[1]
+
+            if img_height != grt_height or img_width != grt_width:
+                raise Exception(
+                    "source img and label img must has the same size")
+        else:
+            if mode == ModelPhase.TRAIN or mode == ModelPhase.EVAL:
+                raise Exception(
+                    "Empty image, src_dir: {}, img: {} & lab: {}".format(
+                        src_dir, img_path, grt_path))
+
+        if len(img.shape) < 3:
+            img = cv2.cvtColor(img, cv2.COLOR_GRAY2BGR)
+
+        img_channels = img.shape[2]
+        if img_channels < 3:
+            raise Exception("PaddleSeg only supports gray, rgb or rgba image")
+        if img_channels != cfg.DATASET.DATA_DIM:
+            raise Exception(
+                "Input image channel({}) is not match cfg.DATASET.DATA_DIM({}), img_name={}"
+                .format(img_channels, cfg.DATASET.DATADIM, img_name))
+        if img_channels != len(cfg.MEAN):
+            raise Exception(
+                "img name {}, img chns {} mean size {}, size unequal".format(
+                    img_name, img_channels, len(cfg.MEAN)))
+        if img_channels != len(cfg.STD):
+            raise Exception(
+                "img name {}, img chns {} std size {}, size unequal".format(
+                    img_name, img_channels, len(cfg.STD)))
+
+        return img, grt, grt_instance, img_name, grt_name
+
+    def normalize_image(self, img):
+        """ 像素归一化后减均值除方差 """
+        img = img.transpose((2, 0, 1)).astype('float32') / 255.0
+        img_mean = np.array(cfg.MEAN).reshape((len(cfg.MEAN), 1, 1))
+        img_std = np.array(cfg.STD).reshape((len(cfg.STD), 1, 1))
+        img -= img_mean
+        img /= img_std
+
+        return img
+
+    def process_image(self, line, data_dir, mode):
+        """ process_image """
+        img, grt, grt_instance, img_name, grt_name = self.load_image(
+            line, data_dir, mode=mode)
+        if mode == ModelPhase.TRAIN:
+            img, grt, grt_instance = aug.resize(img, grt, grt_instance, mode)
+            if cfg.AUG.RICH_CROP.ENABLE:
+                if cfg.AUG.RICH_CROP.BLUR:
+                    if cfg.AUG.RICH_CROP.BLUR_RATIO <= 0:
+                        n = 0
+                    elif cfg.AUG.RICH_CROP.BLUR_RATIO >= 1:
+                        n = 1
+                    else:
+                        n = int(1.0 / cfg.AUG.RICH_CROP.BLUR_RATIO)
+                    if n > 0:
+                        if np.random.randint(0, n) == 0:
+                            radius = np.random.randint(3, 10)
+                            if radius % 2 != 1:
+                                radius = radius + 1
+                            if radius > 9:
+                                radius = 9
+                            img = cv2.GaussianBlur(img, (radius, radius), 0, 0)
+
+                img, grt = aug.random_rotation(
+                    img,
+                    grt,
+                    rich_crop_max_rotation=cfg.AUG.RICH_CROP.MAX_ROTATION,
+                    mean_value=cfg.DATASET.PADDING_VALUE)
+
+                img, grt = aug.rand_scale_aspect(
+                    img,
+                    grt,
+                    rich_crop_min_scale=cfg.AUG.RICH_CROP.MIN_AREA_RATIO,
+                    rich_crop_aspect_ratio=cfg.AUG.RICH_CROP.ASPECT_RATIO)
+                img = aug.hsv_color_jitter(
+                    img,
+                    brightness_jitter_ratio=cfg.AUG.RICH_CROP.
+                    BRIGHTNESS_JITTER_RATIO,
+                    saturation_jitter_ratio=cfg.AUG.RICH_CROP.
+                    SATURATION_JITTER_RATIO,
+                    contrast_jitter_ratio=cfg.AUG.RICH_CROP.
+                    CONTRAST_JITTER_RATIO)
+
+            if cfg.AUG.FLIP:
+                if cfg.AUG.FLIP_RATIO <= 0:
+                    n = 0
+                elif cfg.AUG.FLIP_RATIO >= 1:
+                    n = 1
+                else:
+                    n = int(1.0 / cfg.AUG.FLIP_RATIO)
+                if n > 0:
+                    if np.random.randint(0, n) == 0:
+                        img = img[::-1, :, :]
+                        grt = grt[::-1, :]
+
+            if cfg.AUG.MIRROR:
+                if np.random.randint(0, 2) == 1:
+                    img = img[:, ::-1, :]
+                    grt = grt[:, ::-1]
+
+            img, grt = aug.rand_crop(img, grt, mode=mode)
+        elif ModelPhase.is_eval(mode):
+            img, grt, grt_instance = aug.resize(img, grt, grt_instance, mode=mode)
+        elif ModelPhase.is_visual(mode):
+            ori_img = img.copy()
+            img, grt, grt_instance = aug.resize(img, grt, grt_instance, mode=mode)
+            valid_shape = [img.shape[0], img.shape[1]]
+        else:
+            raise ValueError("Dataset mode={} Error!".format(mode))
+
+        # Normalize image
+        img = self.normalize_image(img)
+
+        if ModelPhase.is_train(mode) or ModelPhase.is_eval(mode):
+            grt = np.expand_dims(np.array(grt).astype('int32'), axis=0)
+            ignore = (grt != cfg.DATASET.IGNORE_INDEX).astype('int32')
+        if ModelPhase.is_train(mode):
+            return (img, grt, grt_instance, ignore)
+        elif ModelPhase.is_eval(mode):
+            return (img, grt, grt_instance, ignore)
+        elif ModelPhase.is_visual(mode):
+            return (img, grt, grt_instance, img_name, valid_shape, ori_img)

contrib/LaneNet/solver.py

+# coding: utf8
+# copyright (c) 2019 PaddlePaddle Authors. All Rights Reserve.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import sys
+import paddle.fluid as fluid
+import numpy as np
+import importlib
+from utils.config import cfg
+
+
+class Solver(object):
+    def __init__(self, main_prog, start_prog):
+        total_images = cfg.DATASET.TRAIN_TOTAL_IMAGES
+        self.weight_decay = cfg.SOLVER.WEIGHT_DECAY
+        self.momentum = cfg.SOLVER.MOMENTUM
+        self.momentum2 = cfg.SOLVER.MOMENTUM2
+        self.step_per_epoch = total_images // cfg.BATCH_SIZE
+        if total_images % cfg.BATCH_SIZE != 0:
+            self.step_per_epoch += 1
+        self.total_step = cfg.SOLVER.NUM_EPOCHS * self.step_per_epoch
+        self.main_prog = main_prog
+        self.start_prog = start_prog
+
+    def lr_warmup(self, learning_rate, warmup_steps, start_lr, end_lr):
+        linear_step = end_lr - start_lr
+        lr = fluid.layers.tensor.create_global_var(
+            shape=[1],
+            value=0.0,
+            dtype='float32',
+            persistable=True,
+            name="learning_rate_warmup")
+
+        global_step = fluid.layers.learning_rate_scheduler._decay_step_counter()
+
+        with fluid.layers.control_flow.Switch() as switch:
+            with switch.case(global_step < warmup_steps):
+                decayed_lr = start_lr + linear_step * (global_step / warmup_steps)
+                fluid.layers.tensor.assign(decayed_lr, lr)
+            with switch.default():
+                fluid.layers.tensor.assign(learning_rate, lr)
+        return lr
+
+    def piecewise_decay(self):
+        gamma = cfg.SOLVER.GAMMA
+        bd = [self.step_per_epoch * e for e in cfg.SOLVER.DECAY_EPOCH]
+        lr = [cfg.SOLVER.LR * (gamma**i) for i in range(len(bd) + 1)]
+        decayed_lr = fluid.layers.piecewise_decay(boundaries=bd, values=lr)
+        return decayed_lr
+
+    def poly_decay(self):
+        power = cfg.SOLVER.POWER
+        decayed_lr = fluid.layers.polynomial_decay(
+            cfg.SOLVER.LR, self.total_step, end_learning_rate=0, power=power)
+        return decayed_lr
+
+    def cosine_decay(self):
+        decayed_lr = fluid.layers.cosine_decay(
+            cfg.SOLVER.LR, self.step_per_epoch, cfg.SOLVER.NUM_EPOCHS)
+        return decayed_lr
+
+    def get_lr(self, lr_policy):
+        if lr_policy.lower() == 'poly':
+            decayed_lr = self.poly_decay()
+        elif lr_policy.lower() == 'piecewise':
+            decayed_lr = self.piecewise_decay()
+        elif lr_policy.lower() == 'cosine':
+            decayed_lr = self.cosine_decay()
+        else:
+            raise Exception(
+                "unsupport learning decay policy! only support poly,piecewise,cosine"
+            )
+
+        if cfg.SOLVER.LR_WARMUP:
+            start_lr = 0 
+            end_lr = cfg.SOLVER.LR
+            warmup_steps = cfg.SOLVER.LR_WARMUP_STEPS 
+            decayed_lr = self.lr_warmup(decayed_lr, warmup_steps, start_lr, end_lr)
+        return decayed_lr
+
+    def sgd_optimizer(self, lr_policy, loss):
+        decayed_lr = self.get_lr(lr_policy)
+        optimizer = fluid.optimizer.Momentum(
+            learning_rate=decayed_lr,
+            momentum=self.momentum,
+            regularization=fluid.regularizer.L2Decay(
+                regularization_coeff=self.weight_decay),
+        )
+
+        optimizer.minimize(loss)
+        return decayed_lr
+
+    def adam_optimizer(self, lr_policy, loss):
+        decayed_lr = self.get_lr(lr_policy)
+        optimizer = fluid.optimizer.Adam(
+            learning_rate=decayed_lr,
+            beta1=self.momentum,
+            beta2=self.momentum2,
+            regularization=fluid.regularizer.L2Decay(
+                regularization_coeff=self.weight_decay),
+        )
+        optimizer.minimize(loss)
+        return decayed_lr
+
+    def optimise(self, loss):
+        lr_policy = cfg.SOLVER.LR_POLICY
+        opt = cfg.SOLVER.OPTIMIZER
+
+        if opt.lower() == 'adam':
+            return self.adam_optimizer(lr_policy, loss)
+        elif opt.lower() == 'sgd':
+            return self.sgd_optimizer(lr_policy, loss)
+        else:
+            raise Exception(
+                "unsupport optimizer solver, only support adam and sgd")

contrib/LaneNet/train.py

+# coding: utf8
+# copyright (c) 2019 PaddlePaddle Authors. All Rights Reserve.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import os
+# GPU memory garbage collection optimization flags
+os.environ['FLAGS_eager_delete_tensor_gb'] = "0.0"
+
+import sys
+
+cur_path = os.path.abspath(os.path.dirname(__file__))
+root_path = os.path.split(os.path.split(cur_path)[0])[0]
+sys.path.append(root_path)
+
+import argparse
+import pprint
+
+import numpy as np
+import paddle.fluid as fluid
+
+from utils.config import cfg
+from utils.timer import Timer, calculate_eta
+from reader import LaneNetDataset
+from models.model_builder import build_model
+from models.model_builder import ModelPhase
+from models.model_builder import parse_shape_from_file
+from eval import evaluate
+from vis import visualize
+from utils import dist_utils
+
+
+def parse_args():
+    parser = argparse.ArgumentParser(description='PaddleSeg training')
+    parser.add_argument(
+        '--cfg',
+        dest='cfg_file',
+        help='Config file for training (and optionally testing)',
+        default=None,
+        type=str)
+    parser.add_argument(
+        '--use_gpu',
+        dest='use_gpu',
+        help='Use gpu or cpu',
+        action='store_true',
+        default=False)
+    parser.add_argument(
+        '--use_mpio',
+        dest='use_mpio',
+        help='Use multiprocess I/O or not',
+        action='store_true',
+        default=False)
+    parser.add_argument(
+        '--log_steps',
+        dest='log_steps',
+        help='Display logging information at every log_steps',
+        default=10,
+        type=int)
+    parser.add_argument(
+        '--debug',
+        dest='debug',
+        help='debug mode, display detail information of training',
+        action='store_true')
+    parser.add_argument(
+        '--use_tb',
+        dest='use_tb',
+        help='whether to record the data during training to Tensorboard',
+        action='store_true')
+    parser.add_argument(
+        '--tb_log_dir',
+        dest='tb_log_dir',
+        help='Tensorboard logging directory',
+        default=None,
+        type=str)
+    parser.add_argument(
+        '--do_eval',
+        dest='do_eval',
+        help='Evaluation models result on every new checkpoint',
+        action='store_true')
+    parser.add_argument(
+        'opts',
+        help='See utils/config.py for all options',
+        default=None,
+        nargs=argparse.REMAINDER)
+    return parser.parse_args()
+
+
+def save_vars(executor, dirname, program=None, vars=None):
+    """
+    Temporary resolution for Win save variables compatability.
+    Will fix in PaddlePaddle v1.5.2
+    """
+
+    save_program = fluid.Program()
+    save_block = save_program.global_block()
+
+    for each_var in vars:
+        # NOTE: don't save the variable which type is RAW
+        if each_var.type == fluid.core.VarDesc.VarType.RAW:
+            continue
+        new_var = save_block.create_var(
+            name=each_var.name,
+            shape=each_var.shape,
+            dtype=each_var.dtype,
+            type=each_var.type,
+            lod_level=each_var.lod_level,
+            persistable=True)
+        file_path = os.path.join(dirname, new_var.name)
+        file_path = os.path.normpath(file_path)
+        save_block.append_op(
+            type='save',
+            inputs={'X': [new_var]},
+            outputs={},
+            attrs={'file_path': file_path})
+
+    executor.run(save_program)
+
+
+def save_checkpoint(exe, program, ckpt_name):
+    """
+    Save checkpoint for evaluation or resume training
+    """
+    ckpt_dir = os.path.join(cfg.TRAIN.MODEL_SAVE_DIR, str(ckpt_name))
+    print("Save model checkpoint to {}".format(ckpt_dir))
+    if not os.path.isdir(ckpt_dir):
+        os.makedirs(ckpt_dir)
+
+    save_vars(
+        exe,
+        ckpt_dir,
+        program,
+        vars=list(filter(fluid.io.is_persistable, program.list_vars())))
+
+    return ckpt_dir
+
+
+def load_checkpoint(exe, program):
+    """
+    Load checkpoiont from pretrained model directory for resume training
+    """
+
+    print('Resume model training from:', cfg.TRAIN.RESUME_MODEL_DIR)
+    if not os.path.exists(cfg.TRAIN.RESUME_MODEL_DIR):
+        raise ValueError("TRAIN.PRETRAIN_MODEL {} not exist!".format(
+            cfg.TRAIN.RESUME_MODEL_DIR))
+
+    fluid.io.load_persistables(
+        exe, cfg.TRAIN.RESUME_MODEL_DIR, main_program=program)
+
+    model_path = cfg.TRAIN.RESUME_MODEL_DIR
+    # Check is path ended by path spearator
+    if model_path[-1] == os.sep:
+        model_path = model_path[0:-1]
+    epoch_name = os.path.basename(model_path)
+    # If resume model is final model
+    if epoch_name == 'final':
+        begin_epoch = cfg.SOLVER.NUM_EPOCHS
+    # If resume model path is end of digit, restore epoch status
+    elif epoch_name.isdigit():
+        epoch = int(epoch_name)
+        begin_epoch = epoch + 1
+    else:
+        raise ValueError("Resume model path is not valid!")
+    print("Model checkpoint loaded successfully!")
+
+    return begin_epoch
+
+
+def print_info(*msg):
+    if cfg.TRAINER_ID == 0:
+        print(*msg)
+
+
+def train(cfg):
+    startup_prog = fluid.Program()
+    train_prog = fluid.Program()
+    drop_last = True
+
+    dataset = LaneNetDataset(
+        file_list=cfg.DATASET.TRAIN_FILE_LIST,
+        mode=ModelPhase.TRAIN,
+        shuffle=True,
+        data_dir=cfg.DATASET.DATA_DIR)
+
+    def data_generator():
+        if args.use_mpio:
+            data_gen = dataset.multiprocess_generator(
+                num_processes=cfg.DATALOADER.NUM_WORKERS,
+                max_queue_size=cfg.DATALOADER.BUF_SIZE)
+        else:
+            data_gen = dataset.generator()
+
+        batch_data = []
+        for b in data_gen:
+            batch_data.append(b)
+            if len(batch_data) == (cfg.BATCH_SIZE // cfg.NUM_TRAINERS):
+                for item in batch_data:
+                    yield item
+                batch_data = []
+
+    # Get device environment
+    gpu_id = int(os.environ.get('FLAGS_selected_gpus', 0))
+    place = fluid.CUDAPlace(gpu_id) if args.use_gpu else fluid.CPUPlace()
+    places = fluid.cuda_places() if args.use_gpu else fluid.cpu_places()
+
+    # Get number of GPU
+    dev_count = cfg.NUM_TRAINERS if cfg.NUM_TRAINERS > 1 else len(places)
+    print_info("#Device count: {}".format(dev_count))
+
+    # Make sure BATCH_SIZE can divided by GPU cards
+    assert cfg.BATCH_SIZE % dev_count == 0, (
+        'BATCH_SIZE:{} not divisble by number of GPUs:{}'.format(
+            cfg.BATCH_SIZE, dev_count))
+    # If use multi-gpu training mode, batch data will allocated to each GPU evenly
+    batch_size_per_dev = cfg.BATCH_SIZE // dev_count
+    cfg.BATCH_SIZE_PER_DEV = batch_size_per_dev
+    print_info("batch_size_per_dev: {}".format(batch_size_per_dev))
+
+    py_reader, avg_loss, lr, pred, grts, masks, emb_loss, seg_loss, accuracy, fp, fn = build_model(
+        train_prog, startup_prog, phase=ModelPhase.TRAIN)
+    py_reader.decorate_sample_generator(
+        data_generator, batch_size=batch_size_per_dev, drop_last=drop_last)
+
+    exe = fluid.Executor(place)
+    exe.run(startup_prog)
+
+    exec_strategy = fluid.ExecutionStrategy()
+    # Clear temporary variables every 100 iteration
+    if args.use_gpu:
+        exec_strategy.num_threads = fluid.core.get_cuda_device_count()
+    exec_strategy.num_iteration_per_drop_scope = 100
+    build_strategy = fluid.BuildStrategy()
+
+    if cfg.NUM_TRAINERS > 1 and args.use_gpu:
+        dist_utils.prepare_for_multi_process(exe, build_strategy, train_prog)
+        exec_strategy.num_threads = 1
+
+    if cfg.TRAIN.SYNC_BATCH_NORM and args.use_gpu:
+        if dev_count > 1:
+            # Apply sync batch norm strategy
+            print_info("Sync BatchNorm strategy is effective.")
+            build_strategy.sync_batch_norm = True
+        else:
+            print_info(
+                "Sync BatchNorm strategy will not be effective if GPU device"
+                " count <= 1")
+    compiled_train_prog = fluid.CompiledProgram(train_prog).with_data_parallel(
+        loss_name=avg_loss.name,
+        exec_strategy=exec_strategy,
+        build_strategy=build_strategy)
+
+    # Resume training
+    begin_epoch = cfg.SOLVER.BEGIN_EPOCH
+    if cfg.TRAIN.RESUME_MODEL_DIR:
+        begin_epoch = load_checkpoint(exe, train_prog)
+    # Load pretrained model
+    elif os.path.exists(cfg.TRAIN.PRETRAINED_MODEL_DIR):
+        print_info('Pretrained model dir: ', cfg.TRAIN.PRETRAINED_MODEL_DIR)
+        load_vars = []
+        load_fail_vars = []
+
+        def var_shape_matched(var, shape):
+            """
+            Check whehter persitable variable shape is match with current network
+            """
+            var_exist = os.path.exists(
+                os.path.join(cfg.TRAIN.PRETRAINED_MODEL_DIR, var.name))
+            if var_exist:
+                var_shape = parse_shape_from_file(
+                    os.path.join(cfg.TRAIN.PRETRAINED_MODEL_DIR, var.name))
+                if var_shape != shape:
+                    print(var.name, var_shape, shape)
+                return var_shape == shape
+            return False
+
+        for x in train_prog.list_vars():
+            if isinstance(x, fluid.framework.Parameter):
+                shape = tuple(fluid.global_scope().find_var(
+                    x.name).get_tensor().shape())
+                if var_shape_matched(x, shape):
+                    load_vars.append(x)
+                else:
+                    load_fail_vars.append(x)
+
+        fluid.io.load_vars(
+            exe, dirname=cfg.TRAIN.PRETRAINED_MODEL_DIR, vars=load_vars)
+        for var in load_vars:
+            print_info("Parameter[{}] loaded sucessfully!".format(var.name))
+        for var in load_fail_vars:
+            print_info(
+                "Parameter[{}] don't exist or shape does not match current network, skip"
+                " to load it.".format(var.name))
+        print_info("{}/{} pretrained parameters loaded successfully!".format(
+            len(load_vars),
+            len(load_vars) + len(load_fail_vars)))
+    else:
+        print_info(
+            'Pretrained model dir {} not exists, training from scratch...'.
+            format(cfg.TRAIN.PRETRAINED_MODEL_DIR))
+
+    # fetch_list = [avg_loss.name, lr.name, accuracy.name, precision.name, recall.name]
+    fetch_list = [avg_loss.name, lr.name, seg_loss.name, emb_loss.name, accuracy.name, fp.name, fn.name]
+    if args.debug:
+        # Fetch more variable info and use streaming confusion matrix to
+        # calculate IoU results if in debug mode
+        np.set_printoptions(
+            precision=4, suppress=True, linewidth=160, floatmode="fixed")
+        fetch_list.extend([pred.name, grts.name, masks.name])
+        # cm = ConfusionMatrix(cfg.DATASET.NUM_CLASSES, streaming=True)
+
+    if args.use_tb:
+        if not args.tb_log_dir:
+            print_info("Please specify the log directory by --tb_log_dir.")
+            exit(1)
+
+        from tb_paddle import SummaryWriter
+        log_writer = SummaryWriter(args.tb_log_dir)
+
+    # trainer_id = int(os.getenv("PADDLE_TRAINER_ID", 0))
+    # num_trainers = int(os.environ.get('PADDLE_TRAINERS_NUM', 1))
+    global_step = 0
+    all_step = cfg.DATASET.TRAIN_TOTAL_IMAGES // cfg.BATCH_SIZE
+    if cfg.DATASET.TRAIN_TOTAL_IMAGES % cfg.BATCH_SIZE and drop_last != True:
+        all_step += 1
+    all_step *= (cfg.SOLVER.NUM_EPOCHS - begin_epoch + 1)
+
+    avg_loss = 0.0
+    avg_seg_loss = 0.0
+    avg_emb_loss = 0.0
+    avg_acc = 0.0
+    avg_fp = 0.0
+    avg_fn = 0.0
+    timer = Timer()
+    timer.start()
+    if begin_epoch > cfg.SOLVER.NUM_EPOCHS:
+        raise ValueError(
+            ("begin epoch[{}] is larger than cfg.SOLVER.NUM_EPOCHS[{}]").format(
+                begin_epoch, cfg.SOLVER.NUM_EPOCHS))
+
+    if args.use_mpio:
+        print_info("Use multiprocess reader")
+    else:
+        print_info("Use multi-thread reader")
+
+    for epoch in range(begin_epoch, cfg.SOLVER.NUM_EPOCHS + 1):
+        py_reader.start()
+        while True:
+            try:
+                # If not in debug mode, avoid unnessary log and calculate
+                loss, lr, out_seg_loss, out_emb_loss, out_acc, out_fp, out_fn = exe.run(
+                    program=compiled_train_prog,
+                    fetch_list=fetch_list,
+                    return_numpy=True)
+
+                avg_loss += np.mean(np.array(loss))
+                avg_seg_loss += np.mean(np.array(out_seg_loss))
+                avg_emb_loss += np.mean(np.array(out_emb_loss))
+                avg_acc += np.mean(out_acc)
+                avg_fp += np.mean(out_fp)
+                avg_fn += np.mean(out_fn)
+                global_step += 1
+
+                if global_step % args.log_steps == 0 and cfg.TRAINER_ID == 0:
+                    avg_loss /= args.log_steps
+                    avg_seg_loss /= args.log_steps
+                    avg_emb_loss /= args.log_steps
+                    avg_acc /= args.log_steps
+                    avg_fp /= args.log_steps
+                    avg_fn /= args.log_steps
+                    speed = args.log_steps / timer.elapsed_time()
+                    print((
+                              "epoch={} step={} lr={:.5f} loss={:.4f} seg_loss={:.4f} emb_loss={:.4f} accuracy={:.4} fp={:.4} fn={:.4} step/sec={:.3f} | ETA {}"
+                          ).format(epoch, global_step, lr[0], avg_loss, avg_seg_loss, avg_emb_loss, avg_acc, avg_fp, avg_fn, speed,
+                                   calculate_eta(all_step - global_step, speed)))
+                    if args.use_tb:
+                        log_writer.add_scalar('Train/loss', avg_loss,
+                                              global_step)
+                        log_writer.add_scalar('Train/lr', lr[0],
+                                              global_step)
+                        log_writer.add_scalar('Train/speed', speed,
+                                              global_step)
+                    sys.stdout.flush()
+                    avg_loss = 0.0
+                    avg_seg_loss = 0.0
+                    avg_emb_loss = 0.0
+                    avg_acc = 0.0
+                    avg_fp = 0.0
+                    avg_fn = 0.0
+                    timer.restart()
+
+            except fluid.core.EOFException:
+                py_reader.reset()
+                break
+            except Exception as e:
+                print(e)
+
+        if epoch % cfg.TRAIN.SNAPSHOT_EPOCH == 0 and cfg.TRAINER_ID == 0:
+            ckpt_dir = save_checkpoint(exe, train_prog, epoch)
+
+            if args.do_eval:
+                print("Evaluation start")
+                accuracy, fp, fn = evaluate(
+                    cfg=cfg,
+                    ckpt_dir=ckpt_dir,
+                    use_gpu=args.use_gpu,
+                    use_mpio=args.use_mpio)
+                if args.use_tb:
+                    log_writer.add_scalar('Evaluate/accuracy', accuracy,
+                                          global_step)
+                    log_writer.add_scalar('Evaluate/fp', fp,
+                                          global_step)
+                    log_writer.add_scalar('Evaluate/fn', fn,
+                                          global_step)
+
+            # Use Tensorboard to visualize results
+            if args.use_tb and cfg.DATASET.VIS_FILE_LIST is not None:
+                visualize(
+                    cfg=cfg,
+                    use_gpu=args.use_gpu,
+                    vis_file_list=cfg.DATASET.VIS_FILE_LIST,
+                    vis_dir="visual",
+                    ckpt_dir=ckpt_dir,
+                    log_writer=log_writer)
+
+    # save final model
+    if cfg.TRAINER_ID == 0:
+        save_checkpoint(exe, train_prog, 'final')
+
+
+def main(args):
+    if args.cfg_file is not None:
+        cfg.update_from_file(args.cfg_file)
+    if args.opts:
+        cfg.update_from_list(args.opts)
+
+    cfg.TRAINER_ID = int(os.getenv("PADDLE_TRAINER_ID", 0))
+    cfg.NUM_TRAINERS = int(os.environ.get('PADDLE_TRAINERS_NUM', 1))
+
+    cfg.check_and_infer()
+    print_info(pprint.pformat(cfg))
+    train(cfg)
+
+
+if __name__ == '__main__':
+    args = parse_args()
+    if fluid.core.is_compiled_with_cuda() != True and args.use_gpu == True:
+        print(
+            "You can not set use_gpu = True in the model because you are using paddlepaddle-cpu."
+        )
+        print(
+            "Please: 1. Install paddlepaddle-gpu to run your models on GPU or 2. Set use_gpu=False to run models on CPU."
+        )
+        sys.exit(1)
+    main(args)

contrib/LaneNet/utils/collect.py

+#   Copyright (c) 2019  PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""A simple attribute dictionary used for representing configuration options."""
+
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+from __future__ import unicode_literals
+
+import copy
+import codecs
+from ast import literal_eval
+
+import yaml
+import six
+
+
+class SegConfig(dict):
+    def __init__(self, *args, **kwargs):
+        super(SegConfig, self).__init__(*args, **kwargs)
+        self.immutable = False
+
+    def __setattr__(self, key, value, create_if_not_exist=True):
+        if key in ["immutable"]:
+            self.__dict__[key] = value
+            return
+
+        t = self
+        keylist = key.split(".")
+        for k in keylist[:-1]:
+            t = t.__getattr__(k, create_if_not_exist)
+
+        t.__getattr__(keylist[-1], create_if_not_exist)
+        t[keylist[-1]] = value
+
+    def __getattr__(self, key, create_if_not_exist=True):
+        if key in ["immutable"]:
+            return self.__dict__[key]
+
+        if not key in self:
+            if not create_if_not_exist:
+                raise KeyError
+            self[key] = SegConfig()
+        return self[key]
+
+    def __setitem__(self, key, value):
+        #
+        if self.immutable:
+            raise AttributeError(
+                'Attempted to set "{}" to "{}", but SegConfig is immutable'.
+                format(key, value))
+        #
+        if isinstance(value, six.string_types):
+            try:
+                value = literal_eval(value)
+            except ValueError:
+                pass
+            except SyntaxError:
+                pass
+        super(SegConfig, self).__setitem__(key, value)
+
+    def update_from_segconfig(self, other):
+        if isinstance(other, dict):
+            other = SegConfig(other)
+        assert isinstance(other, SegConfig)
+        diclist = [("", other)]
+        while len(diclist):
+            prefix, tdic = diclist[0]
+            diclist = diclist[1:]
+            for key, value in tdic.items():
+                key = "{}.{}".format(prefix, key) if prefix else key
+                if isinstance(value, dict):
+                    diclist.append((key, value))
+                    continue
+                try:
+                    self.__setattr__(key, value, create_if_not_exist=False)
+                except KeyError:
+                    raise KeyError('Non-existent config key: {}'.format(key))
+
+    def check_and_infer(self):
+        if self.DATASET.IMAGE_TYPE in ['rgb', 'gray']:
+            self.DATASET.DATA_DIM = 3
+        elif self.DATASET.IMAGE_TYPE in ['rgba']:
+            self.DATASET.DATA_DIM = 4
+        else:
+            raise KeyError(
+                'DATASET.IMAGE_TYPE config error, only support `rgb`, `gray` and `rgba`'
+            )
+        if self.MEAN is not None:
+            self.DATASET.PADDING_VALUE = [x*255.0 for x in self.MEAN]
+
+        if not self.TRAIN_CROP_SIZE:
+            raise ValueError(
+                'TRAIN_CROP_SIZE is empty! Please set a pair of values in format (width, height)'
+            )
+
+        if not self.EVAL_CROP_SIZE:
+            raise ValueError(
+                'EVAL_CROP_SIZE is empty! Please set a pair of values in format (width, height)'
+            )
+
+        # Ensure file list is use UTF-8 encoding
+        train_sets = codecs.open(self.DATASET.TRAIN_FILE_LIST, 'r', 'utf-8').readlines()
+        val_sets = codecs.open(self.DATASET.VAL_FILE_LIST, 'r', 'utf-8').readlines()
+        test_sets = codecs.open(self.DATASET.TEST_FILE_LIST, 'r', 'utf-8').readlines()
+        self.DATASET.TRAIN_TOTAL_IMAGES = len(train_sets)
+        self.DATASET.VAL_TOTAL_IMAGES = len(val_sets)
+        self.DATASET.TEST_TOTAL_IMAGES = len(test_sets)
+
+        if self.MODEL.MODEL_NAME == 'icnet' and \
+                len(self.MODEL.MULTI_LOSS_WEIGHT) != 3:
+            self.MODEL.MULTI_LOSS_WEIGHT = [1.0, 0.4, 0.16]
+
+    def update_from_list(self, config_list):
+        if len(config_list) % 2 != 0:
+            raise ValueError(
+                "Command line options config format error! Please check it: {}".
+                format(config_list))
+        for key, value in zip(config_list[0::2], config_list[1::2]):
+            try:
+                self.__setattr__(key, value, create_if_not_exist=False)
+            except KeyError:
+                raise KeyError('Non-existent config key: {}'.format(key))
+
+    def update_from_file(self, config_file):
+        with codecs.open(config_file, 'r', 'utf-8') as file:
+            dic = yaml.load(file, Loader=yaml.FullLoader)
+        self.update_from_segconfig(dic)
+
+    def set_immutable(self, immutable):
+        self.immutable = immutable
+        for value in self.values():
+            if isinstance(value, SegConfig):
+                value.set_immutable(immutable)
+
+    def is_immutable(self):
+        return self.immutable

contrib/LaneNet/utils/config.py

+# -*- coding: utf-8 -*-
+#   Copyright (c) 2019  PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from __future__ import print_function
+from __future__ import unicode_literals
+from utils.collect import SegConfig
+import numpy as np
+
+cfg = SegConfig()
+
+########################## 基本配置 ###########################################
+# 均值，图像预处理减去的均值
+cfg.MEAN = [0.5, 0.5, 0.5]
+# 标准差，图像预处理除以标准差·
+cfg.STD = [0.5, 0.5, 0.5]
+# 批处理大小
+cfg.BATCH_SIZE = 1
+# 验证时图像裁剪尺寸（宽，高）
+cfg.EVAL_CROP_SIZE = tuple()
+# 训练时图像裁剪尺寸（宽，高）
+cfg.TRAIN_CROP_SIZE = tuple()
+# 多进程训练总进程数
+cfg.NUM_TRAINERS = 1
+# 多进程训练进程ID
+cfg.TRAINER_ID = 0
+# 每张gpu上的批大小，无需设置，程序会自动根据batch调整
+cfg.BATCH_SIZE_PER_DEV = 1
+########################## 数据载入配置 #######################################
+# 数据载入时的并发数, 建议值8
+cfg.DATALOADER.NUM_WORKERS = 8
+# 数据载入时缓存队列大小, 建议值256
+cfg.DATALOADER.BUF_SIZE = 256
+
+########################## 数据集配置 #########################################
+# 数据主目录目录
+cfg.DATASET.DATA_DIR = './dataset/cityscapes/'
+# 训练集列表
+cfg.DATASET.TRAIN_FILE_LIST = './dataset/cityscapes/train.list'
+# 训练集数量
+cfg.DATASET.TRAIN_TOTAL_IMAGES = 2975
+# 验证集列表
+cfg.DATASET.VAL_FILE_LIST = './dataset/cityscapes/val.list'
+# 验证数据数量
+cfg.DATASET.VAL_TOTAL_IMAGES = 500
+# 测试数据列表
+cfg.DATASET.TEST_FILE_LIST = './dataset/cityscapes/test.list'
+# 测试数据数量
+cfg.DATASET.TEST_TOTAL_IMAGES = 500
+# Tensorboard 可视化的数据集
+cfg.DATASET.VIS_FILE_LIST = None
+# 类别数(需包括背景类)
+cfg.DATASET.NUM_CLASSES = 19
+# 输入图像类型, 支持三通道'rgb',四通道'rgba',单通道灰度图'gray'
+cfg.DATASET.IMAGE_TYPE = 'rgb'
+# 输入图片的通道数
+cfg.DATASET.DATA_DIM = 3
+# 数据列表分割符, 默认为空格
+cfg.DATASET.SEPARATOR = ' '
+# 忽略的像素标签值, 默认为255，一般无需改动
+cfg.DATASET.IGNORE_INDEX = 255
+# 数据增强是图像的padding值 
+cfg.DATASET.PADDING_VALUE = [127.5,127.5,127.5]
+
+########################### 数据增强配置 ######################################
+# 图像镜像左右翻转
+cfg.AUG.MIRROR = True
+# 图像上下翻转开关，True/False
+cfg.AUG.FLIP = False
+# 图像启动上下翻转的概率，0-1
+cfg.AUG.FLIP_RATIO = 0.5
+# 图像resize的固定尺寸（宽，高），非负
+cfg.AUG.FIX_RESIZE_SIZE = tuple()
+# 图像resize的方式有三种：
+# unpadding（固定尺寸），stepscaling（按比例resize），rangescaling（长边对齐）
+cfg.AUG.AUG_METHOD = 'rangescaling'
+# 图像resize方式为stepscaling，resize最小尺度，非负
+cfg.AUG.MIN_SCALE_FACTOR = 0.5
+# 图像resize方式为stepscaling，resize最大尺度，不小于MIN_SCALE_FACTOR
+cfg.AUG.MAX_SCALE_FACTOR = 2.0
+# 图像resize方式为stepscaling，resize尺度范围间隔，非负
+cfg.AUG.SCALE_STEP_SIZE = 0.25
+# 图像resize方式为rangescaling，训练时长边resize的范围最小值，非负
+cfg.AUG.MIN_RESIZE_VALUE = 400
+# 图像resize方式为rangescaling，训练时长边resize的范围最大值，
+# 不小于MIN_RESIZE_VALUE
+cfg.AUG.MAX_RESIZE_VALUE = 600
+# 图像resize方式为rangescaling, 测试验证可视化模式下长边resize的长度，
+# 在MIN_RESIZE_VALUE到MAX_RESIZE_VALUE范围内
+cfg.AUG.INF_RESIZE_VALUE = 500
+
+# RichCrop数据增广开关，用于提升模型鲁棒性
+cfg.AUG.RICH_CROP.ENABLE = False
+# 图像旋转最大角度，0-90
+cfg.AUG.RICH_CROP.MAX_ROTATION = 15
+# 裁取图像与原始图像面积比，0-1
+cfg.AUG.RICH_CROP.MIN_AREA_RATIO = 0.5
+# 裁取图像宽高比范围，非负
+cfg.AUG.RICH_CROP.ASPECT_RATIO = 0.33
+# 亮度调节范围，0-1
+cfg.AUG.RICH_CROP.BRIGHTNESS_JITTER_RATIO = 0.5
+# 饱和度调节范围，0-1
+cfg.AUG.RICH_CROP.SATURATION_JITTER_RATIO = 0.5
+# 对比度调节范围，0-1
+cfg.AUG.RICH_CROP.CONTRAST_JITTER_RATIO = 0.5
+# 图像模糊开关，True/False
+cfg.AUG.RICH_CROP.BLUR = False
+# 图像启动模糊百分比，0-1
+cfg.AUG.RICH_CROP.BLUR_RATIO = 0.1
+
+########################### 训练配置 ##########################################
+# 模型保存路径
+cfg.TRAIN.MODEL_SAVE_DIR = ''
+# 预训练模型路径
+cfg.TRAIN.PRETRAINED_MODEL_DIR = ''
+# 是否resume，继续训练
+cfg.TRAIN.RESUME_MODEL_DIR = ''
+# 是否使用多卡间同步BatchNorm均值和方差
+cfg.TRAIN.SYNC_BATCH_NORM = False
+# 模型参数保存的epoch间隔数，可用来继续训练中断的模型
+cfg.TRAIN.SNAPSHOT_EPOCH = 10
+
+########################### 模型优化相关配置 ##################################
+# 初始学习率
+cfg.SOLVER.LR = 0.1
+# 学习率下降方法, 支持poly piecewise cosine 三种
+cfg.SOLVER.LR_POLICY = "poly"
+# 优化算法, 支持SGD和Adam两种算法
+cfg.SOLVER.OPTIMIZER = "sgd"
+# 动量参数
+cfg.SOLVER.MOMENTUM = 0.9
+# 二阶矩估计的指数衰减率
+cfg.SOLVER.MOMENTUM2 = 0.999
+# 学习率Poly下降指数
+cfg.SOLVER.POWER = 0.9
+# step下降指数
+cfg.SOLVER.GAMMA = 0.1
+# step下降间隔
+cfg.SOLVER.DECAY_EPOCH = [10, 20]
+# 学习率权重衰减，0-1
+cfg.SOLVER.WEIGHT_DECAY = 0.00004
+# 训练开始epoch数，默认为1
+cfg.SOLVER.BEGIN_EPOCH = 1
+# 训练epoch数，正整数
+cfg.SOLVER.NUM_EPOCHS = 30
+# loss的选择，支持softmax_loss, bce_loss, dice_loss
+cfg.SOLVER.LOSS = ["softmax_loss"]
+# cross entropy weight, 如果不为None，会根据每个batch中各个类别的数目，动态调整类别权重。
+# 也可以设置一个静态权重，比如有3类，每个类别权重可以设置为[0.1, 2.0, 0.9]
+cfg.SOLVER.CROSS_ENTROPY_WEIGHT = None
+########################## 测试配置 ###########################################
+# 测试模型路径
+cfg.TEST.TEST_MODEL = ''
+
+########################## 模型通用配置 #######################################
+# 模型名称, 支持deeplab, unet, icnet三种
+cfg.MODEL.MODEL_NAME = ''
+# BatchNorm类型: bn、gn(group_norm)
+cfg.MODEL.DEFAULT_NORM_TYPE = 'bn'
+# 多路损失加权值
+cfg.MODEL.MULTI_LOSS_WEIGHT = [1.0]
+# DEFAULT_NORM_TYPE为gn时group数
+cfg.MODEL.DEFAULT_GROUP_NUMBER = 32
+# 极小值, 防止分母除0溢出，一般无需改动
+cfg.MODEL.DEFAULT_EPSILON = 1e-5
+# BatchNorm动量, 一般无需改动
+cfg.MODEL.BN_MOMENTUM = 0.99
+# 是否使用FP16训练
+cfg.MODEL.FP16 = False
+# 混合精度训练需对LOSS进行scale, 默认为动态scale，静态scale可以设置为512.0
+cfg.MODEL.SCALE_LOSS = "DYNAMIC"
+
+########################## DeepLab模型配置 ####################################
+# DeepLab backbone 配置, 可选项xception_65, mobilenetv2
+cfg.MODEL.DEEPLAB.BACKBONE = "xception_65"
+# DeepLab output stride
+cfg.MODEL.DEEPLAB.OUTPUT_STRIDE = 16
+# MobileNet backbone scale 设置
+cfg.MODEL.DEEPLAB.DEPTH_MULTIPLIER = 1.0
+# MobileNet backbone scale 设置
+cfg.MODEL.DEEPLAB.ENCODER_WITH_ASPP = True
+# MobileNet backbone scale 设置
+cfg.MODEL.DEEPLAB.ENABLE_DECODER = True
+# ASPP是否使用可分离卷积
+cfg.MODEL.DEEPLAB.ASPP_WITH_SEP_CONV = True
+# 解码器是否使用可分离卷积
+cfg.MODEL.DEEPLAB.DECODER_USE_SEP_CONV = True
+
+########################## UNET模型配置 #######################################
+# 上采样方式, 默认为双线性插值
+cfg.MODEL.UNET.UPSAMPLE_MODE = 'bilinear'
+
+########################## ICNET模型配置 ######################################
+# RESNET backbone scale 设置
+cfg.MODEL.ICNET.DEPTH_MULTIPLIER = 0.5
+# RESNET 层数 设置
+cfg.MODEL.ICNET.LAYERS = 50
+
+########################## PSPNET模型配置 ######################################
+# Lannet backbone name
+cfg.MODEL.LANENET.BACKBONE = "vgg"
+
+########################## LaneNet模型配置 ######################################
+
+########################## 预测部署模型配置 ###################################
+# 预测保存的模型名称
+cfg.FREEZE.MODEL_FILENAME = '__model__'
+# 预测保存的参数名称
+cfg.FREEZE.PARAMS_FILENAME = '__params__'
+# 预测模型参数保存的路径
+cfg.FREEZE.SAVE_DIR = 'freeze_model'

contrib/LaneNet/utils/dist_utils.py

+#copyright (c) 2019 PaddlePaddle Authors. All Rights Reserve.
+#
+#Licensed under the Apache License, Version 2.0 (the "License");
+#you may not use this file except in compliance with the License.
+#You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+#Unless required by applicable law or agreed to in writing, software
+#distributed under the License is distributed on an "AS IS" BASIS,
+#WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#See the License for the specific language governing permissions and
+#limitations under the License.
+
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+import os
+import paddle.fluid as fluid
+
+
+def nccl2_prepare(args, startup_prog, main_prog):
+    config = fluid.DistributeTranspilerConfig()
+    config.mode = "nccl2"
+    t = fluid.DistributeTranspiler(config=config)
+
+    envs = args.dist_env
+
+    t.transpile(
+        envs["trainer_id"],
+        trainers=','.join(envs["trainer_endpoints"]),
+        current_endpoint=envs["current_endpoint"],
+        startup_program=startup_prog,
+        program=main_prog)
+
+
+def pserver_prepare(args, train_prog, startup_prog):
+    config = fluid.DistributeTranspilerConfig()
+    config.slice_var_up = args.split_var
+    t = fluid.DistributeTranspiler(config=config)
+    envs = args.dist_env
+    training_role = envs["training_role"]
+
+    t.transpile(
+        envs["trainer_id"],
+        program=train_prog,
+        pservers=envs["pserver_endpoints"],
+        trainers=envs["num_trainers"],
+        sync_mode=not args.async_mode,
+        startup_program=startup_prog)
+    if training_role == "PSERVER":
+        pserver_program = t.get_pserver_program(envs["current_endpoint"])
+        pserver_startup_program = t.get_startup_program(
+            envs["current_endpoint"],
+            pserver_program,
+            startup_program=startup_prog)
+        return pserver_program, pserver_startup_program
+    elif training_role == "TRAINER":
+        train_program = t.get_trainer_program()
+        return train_program, startup_prog
+    else:
+        raise ValueError(
+            'PADDLE_TRAINING_ROLE environment variable must be either TRAINER or PSERVER'
+        )
+
+
+def nccl2_prepare_paddle(trainer_id, startup_prog, main_prog):
+    config = fluid.DistributeTranspilerConfig()
+    config.mode = "nccl2"
+    t = fluid.DistributeTranspiler(config=config)
+    t.transpile(
+        trainer_id,
+        trainers=os.environ.get('PADDLE_TRAINER_ENDPOINTS'),
+        current_endpoint=os.environ.get('PADDLE_CURRENT_ENDPOINT'),
+        startup_program=startup_prog,
+        program=main_prog)
+
+
+def prepare_for_multi_process(exe, build_strategy, train_prog):
+    # prepare for multi-process
+    trainer_id = int(os.environ.get('PADDLE_TRAINER_ID', 0))
+    num_trainers = int(os.environ.get('PADDLE_TRAINERS_NUM', 1))
+    if num_trainers < 2: return
+
+    build_strategy.num_trainers = num_trainers
+    build_strategy.trainer_id = trainer_id
+    # NOTE(zcd): use multi processes to train the model,
+    # and each process use one GPU card.
+    startup_prog = fluid.Program()
+    nccl2_prepare_paddle(trainer_id, startup_prog, train_prog)
+    # the startup_prog are run two times, but it doesn't matter.
+    exe.run(startup_prog)

contrib/LaneNet/utils/fp16_utils.py

+import os
+from paddle import fluid
+
+def load_fp16_vars(executor, dirname, program):
+    load_dirname = os.path.normpath(dirname)
+
+    def _if_exist(var):
+        name = var.name[:-7] if var.name.endswith('.master') else var.name
+        b = os.path.exists(os.path.join(load_dirname, name))
+        if not b and isinstance(var, fluid.framework.Parameter):
+            print("===== {} not found ====".format(var.name))
+        return b
+
+    load_prog = fluid.Program()
+    load_block = load_prog.global_block()
+    vars = list(filter(_if_exist, program.list_vars()))
+
+    for var in vars:
+        new_var = fluid.io._clone_var_in_block_(load_block, var)
+        name = var.name[:-7] if var.name.endswith('.master') else var.name
+        file_path = os.path.join(load_dirname, name)
+        load_block.append_op(
+            type='load',
+            inputs={},
+            outputs={'Out': [new_var]},
+            attrs={
+                'file_path': file_path,
+                'load_as_fp16': var.dtype == fluid.core.VarDesc.VarType.FP16
+            })
+
+    executor.run(load_prog)
\ No newline at end of file

contrib/LaneNet/utils/generate_tusimple_dataset.py

+"""
+generate tusimple training dataset
+"""
+import argparse
+import glob
+import json
+import os
+import os.path as ops
+import shutil
+
+import cv2
+import numpy as np
+
+
+def init_args():
+    parser = argparse.ArgumentParser()
+    parser.add_argument('--src_dir', type=str, help='The origin path of unzipped tusimple dataset')
+
+    return parser.parse_args()
+
+
+def process_json_file(json_file_path, src_dir, ori_dst_dir, binary_dst_dir, instance_dst_dir):
+
+    assert ops.exists(json_file_path), '{:s} not exist'.format(json_file_path)
+
+    image_nums = len(os.listdir(os.path.join(src_dir, ori_dst_dir)))
+
+    with open(json_file_path, 'r') as file:
+        for line_index, line in enumerate(file):
+            info_dict = json.loads(line)
+
+            image_dir = ops.split(info_dict['raw_file'])[0]
+            image_dir_split = image_dir.split('/')[1:]
+            image_dir_split.append(ops.split(info_dict['raw_file'])[1])
+            image_name = '_'.join(image_dir_split)
+            image_path = ops.join(src_dir, info_dict['raw_file'])
+            assert ops.exists(image_path), '{:s} not exist'.format(image_path)
+
+            h_samples = info_dict['h_samples']
+            lanes = info_dict['lanes']
+
+            image_name_new = '{:s}.png'.format('{:d}'.format(line_index + image_nums).zfill(4))
+
+            src_image = cv2.imread(image_path, cv2.IMREAD_COLOR)
+            dst_binary_image = np.zeros([src_image.shape[0], src_image.shape[1]], np.uint8)
+            dst_instance_image = np.zeros([src_image.shape[0], src_image.shape[1]], np.uint8)
+
+            for lane_index, lane in enumerate(lanes):
+                assert len(h_samples) == len(lane)
+                lane_x = []
+                lane_y = []
+                for index in range(len(lane)):
+                    if lane[index] == -2:
+                        continue
+                    else:
+                        ptx = lane[index]
+                        pty = h_samples[index]
+                        lane_x.append(ptx)
+                        lane_y.append(pty)
+                if not lane_x:
+                    continue
+                lane_pts = np.vstack((lane_x, lane_y)).transpose()
+                lane_pts = np.array([lane_pts], np.int64)
+
+                cv2.polylines(dst_binary_image, lane_pts, isClosed=False,
+                              color=255, thickness=5)
+                cv2.polylines(dst_instance_image, lane_pts, isClosed=False,
+                              color=lane_index * 50 + 20, thickness=5)
+
+            dst_binary_image_path = ops.join(src_dir, binary_dst_dir, image_name_new)
+            dst_instance_image_path = ops.join(src_dir, instance_dst_dir, image_name_new)
+            dst_rgb_image_path = ops.join(src_dir, ori_dst_dir, image_name_new)
+
+            cv2.imwrite(dst_binary_image_path, dst_binary_image)
+            cv2.imwrite(dst_instance_image_path, dst_instance_image)
+            cv2.imwrite(dst_rgb_image_path, src_image)
+
+            print('Process {:s} success'.format(image_name))
+
+
+def gen_sample(src_dir, b_gt_image_dir, i_gt_image_dir, image_dir, phase='train', split=False):
+
+    label_list = []
+    with open('{:s}/{}ing/{}.txt'.format(src_dir, phase, phase), 'w') as file:
+
+        for image_name in os.listdir(b_gt_image_dir):
+            if not image_name.endswith('.png'):
+                continue
+
+            binary_gt_image_path = ops.join(b_gt_image_dir, image_name)
+            instance_gt_image_path = ops.join(i_gt_image_dir, image_name)
+            image_path = ops.join(image_dir, image_name)
+
+            assert ops.exists(image_path), '{:s} not exist'.format(image_path)
+            assert ops.exists(instance_gt_image_path), '{:s} not exist'.format(instance_gt_image_path)
+
+            b_gt_image = cv2.imread(binary_gt_image_path, cv2.IMREAD_COLOR)
+            i_gt_image = cv2.imread(instance_gt_image_path, cv2.IMREAD_COLOR)
+            image = cv2.imread(image_path, cv2.IMREAD_COLOR)
+
+            if b_gt_image is None or image is None or i_gt_image is None:
+                print('image: {:s} corrupt'.format(image_name))
+                continue
+            else:
+                info = '{:s} {:s} {:s}'.format(image_path, binary_gt_image_path, instance_gt_image_path)
+                file.write(info + '\n')
+                label_list.append(info)
+    if phase == 'train' and split:
+        np.random.RandomState(0).shuffle(label_list)
+        val_list_len = len(label_list) // 10
+        val_label_list = label_list[:val_list_len]
+        train_label_list = label_list[val_list_len:]
+        with open('{:s}/{}ing/train_part.txt'.format(src_dir, phase, phase), 'w') as file:
+            for info in train_label_list:
+                file.write(info + '\n')
+        with open('{:s}/{}ing/val_part.txt'.format(src_dir, phase, phase), 'w') as file:
+            for info in val_label_list:
+                file.write(info + '\n')
+    return
+
+
+def process_tusimple_dataset(src_dir):
+
+    traing_folder_path = ops.join(src_dir, 'training')
+    testing_folder_path = ops.join(src_dir, 'testing')
+
+    os.makedirs(traing_folder_path, exist_ok=True)
+    os.makedirs(testing_folder_path, exist_ok=True)
+
+    for json_label_path in glob.glob('{:s}/label*.json'.format(src_dir)):
+        json_label_name = ops.split(json_label_path)[1]
+
+        shutil.copyfile(json_label_path, ops.join(traing_folder_path, json_label_name))
+
+    for json_label_path in glob.glob('{:s}/test_label.json'.format(src_dir)):
+        json_label_name = ops.split(json_label_path)[1]
+
+        shutil.copyfile(json_label_path, ops.join(testing_folder_path, json_label_name))
+
+    # train_gt_image_dir = ops.join(traing_folder_path, 'gt_image')
+    # train_gt_binary_dir = ops.join(traing_folder_path, 'gt_binary_image')
+    # train_gt_instance_dir = ops.join(traing_folder_path, 'gt_instance_image')
+    #
+    # test_gt_image_dir = ops.join(testing_folder_path, 'gt_image')
+    # test_gt_binary_dir = ops.join(testing_folder_path, 'gt_binary_image')
+    # test_gt_instance_dir = ops.join(testing_folder_path, 'gt_instance_image')
+
+    train_gt_image_dir = ops.join('training', 'gt_image')
+    train_gt_binary_dir = ops.join('training', 'gt_binary_image')
+    train_gt_instance_dir = ops.join('training', 'gt_instance_image')
+
+    test_gt_image_dir = ops.join('testing', 'gt_image')
+    test_gt_binary_dir = ops.join('testing', 'gt_binary_image')
+    test_gt_instance_dir = ops.join('testing', 'gt_instance_image')
+
+    os.makedirs(os.path.join(src_dir, train_gt_image_dir), exist_ok=True)
+    os.makedirs(os.path.join(src_dir, train_gt_binary_dir), exist_ok=True)
+    os.makedirs(os.path.join(src_dir, train_gt_instance_dir), exist_ok=True)
+
+    os.makedirs(os.path.join(src_dir, test_gt_image_dir), exist_ok=True)
+    os.makedirs(os.path.join(src_dir, test_gt_binary_dir), exist_ok=True)
+    os.makedirs(os.path.join(src_dir, test_gt_instance_dir), exist_ok=True)
+
+    for json_label_path in glob.glob('{:s}/*.json'.format(traing_folder_path)):
+        process_json_file(json_label_path, src_dir, train_gt_image_dir, train_gt_binary_dir, train_gt_instance_dir)
+
+    gen_sample(src_dir, train_gt_binary_dir, train_gt_instance_dir, train_gt_image_dir, 'train', True)
+
+    for json_label_path in glob.glob('{:s}/*.json'.format(testing_folder_path)):
+        process_json_file(json_label_path, src_dir, test_gt_image_dir, test_gt_binary_dir, test_gt_instance_dir)
+
+    gen_sample(src_dir, test_gt_binary_dir, test_gt_instance_dir, test_gt_image_dir, 'test')
+
+    return
+
+
+if __name__ == '__main__':
+    args = init_args()
+
+    process_tusimple_dataset(args.src_dir)

contrib/LaneNet/utils/lanenet_postprocess.py

+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+# this code heavily base on https://github.com/MaybeShewill-CV/lanenet-lane-detection/blob/master/lanenet_model/lanenet_postprocess.py
+"""
+LaneNet model post process
+"""
+import os.path as ops
+import math
+
+import cv2
+import time
+import numpy as np
+from sklearn.cluster import DBSCAN
+from sklearn.preprocessing import StandardScaler
+
+
+def _morphological_process(image, kernel_size=5):
+    """
+    morphological process to fill the hole in the binary segmentation result
+    :param image:
+    :param kernel_size:
+    :return:
+    """
+    if len(image.shape) == 3:
+        raise ValueError('Binary segmentation result image should be a single channel image')
+
+    if image.dtype is not np.uint8:
+        image = np.array(image, np.uint8)
+
+    kernel = cv2.getStructuringElement(shape=cv2.MORPH_ELLIPSE, ksize=(kernel_size, kernel_size))
+
+    # close operation fille hole
+    closing = cv2.morphologyEx(image, cv2.MORPH_CLOSE, kernel, iterations=1)
+
+    return closing
+
+
+def _connect_components_analysis(image):
+    """
+    connect components analysis to remove the small components
+    :param image:
+    :return:
+    """
+    if len(image.shape) == 3:
+        gray_image = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
+    else:
+        gray_image = image
+
+    return cv2.connectedComponentsWithStats(gray_image, connectivity=8, ltype=cv2.CV_32S)
+
+
+class _LaneFeat(object):
+    """
+
+    """
+    def __init__(self, feat, coord, class_id=-1):
+        """
+        lane feat object
+        :param feat: lane embeddng feats [feature_1, feature_2, ...]
+        :param coord: lane coordinates [x, y]
+        :param class_id: lane class id
+        """
+        self._feat = feat
+        self._coord = coord
+        self._class_id = class_id
+
+    @property
+    def feat(self):
+        return self._feat
+
+    @feat.setter
+    def feat(self, value):
+        if not isinstance(value, np.ndarray):
+            value = np.array(value, dtype=np.float64)
+
+        if value.dtype != np.float32:
+            value = np.array(value, dtype=np.float64)
+
+        self._feat = value
+
+    @property
+    def coord(self):
+        return self._coord
+
+    @coord.setter
+    def coord(self, value):
+        if not isinstance(value, np.ndarray):
+            value = np.array(value)
+
+        if value.dtype != np.int32:
+            value = np.array(value, dtype=np.int32)
+
+        self._coord = value
+
+    @property
+    def class_id(self):
+        return self._class_id
+
+    @class_id.setter
+    def class_id(self, value):
+        if not isinstance(value, np.int64):
+            raise ValueError('Class id must be integer')
+
+        self._class_id = value
+
+
+class _LaneNetCluster(object):
+    """
+     Instance segmentation result cluster
+    """
+    def __init__(self):
+        """
+
+        """
+        self._color_map = [np.array([255, 0, 0]),
+                           np.array([0, 255, 0]),
+                           np.array([0, 0, 255]),
+                           np.array([125, 125, 0]),
+                           np.array([0, 125, 125]),
+                           np.array([125, 0, 125]),
+                           np.array([50, 100, 50]),
+                           np.array([100, 50, 100])]
+
+    @staticmethod
+    def _embedding_feats_dbscan_cluster(embedding_image_feats):
+        """
+        dbscan cluster
+        """
+        db = DBSCAN(eps=0.4, min_samples=500)
+
+        try:
+            features = StandardScaler().fit_transform(embedding_image_feats)
+            db.fit(features)
+        except Exception as err:
+            print(err)
+            ret = {
+                'origin_features': None,
+                'cluster_nums': 0,
+                'db_labels': None,
+                'unique_labels': None,
+                'cluster_center': None
+            }
+            return ret
+        db_labels = db.labels_
+        unique_labels = np.unique(db_labels)
+        num_clusters = len(unique_labels)
+        cluster_centers = db.components_
+
+        ret = {
+            'origin_features': features,
+            'cluster_nums': num_clusters,
+            'db_labels': db_labels,
+            'unique_labels': unique_labels,
+            'cluster_center': cluster_centers
+        }
+
+        return ret
+
+    @staticmethod
+    def _get_lane_embedding_feats(binary_seg_ret, instance_seg_ret):
+        """
+        get lane embedding features according the binary seg result
+        """
+
+        idx = np.where(binary_seg_ret == 255)
+        lane_embedding_feats = instance_seg_ret[idx]
+
+        lane_coordinate = np.vstack((idx[1], idx[0])).transpose()
+
+        assert lane_embedding_feats.shape[0] == lane_coordinate.shape[0]
+
+        ret = {
+            'lane_embedding_feats': lane_embedding_feats,
+            'lane_coordinates': lane_coordinate
+        }
+
+        return ret
+
+    def apply_lane_feats_cluster(self, binary_seg_result, instance_seg_result):
+        """
+
+        :param binary_seg_result:
+        :param instance_seg_result:
+        :return:
+        """
+        # get embedding feats and coords
+        get_lane_embedding_feats_result = self._get_lane_embedding_feats(
+            binary_seg_ret=binary_seg_result,
+            instance_seg_ret=instance_seg_result
+        )
+
+        # dbscan cluster
+        dbscan_cluster_result = self._embedding_feats_dbscan_cluster(
+            embedding_image_feats=get_lane_embedding_feats_result['lane_embedding_feats']
+        )
+
+        mask = np.zeros(shape=[binary_seg_result.shape[0], binary_seg_result.shape[1], 3], dtype=np.uint8)
+        db_labels = dbscan_cluster_result['db_labels']
+        unique_labels = dbscan_cluster_result['unique_labels']
+        coord = get_lane_embedding_feats_result['lane_coordinates']
+
+        if db_labels is None:
+            return None, None
+
+        lane_coords = []
+
+        for index, label in enumerate(unique_labels.tolist()):
+            if label == -1:
+                continue
+            idx = np.where(db_labels == label)
+            pix_coord_idx = tuple((coord[idx][:, 1], coord[idx][:, 0]))
+            mask[pix_coord_idx] = self._color_map[index]
+            lane_coords.append(coord[idx])
+
+        return mask, lane_coords
+
+
+class LaneNetPostProcessor(object):
+    """
+    lanenet post process for lane generation
+    """
+    def __init__(self, ipm_remap_file_path='./utils/tusimple_ipm_remap.yml'):
+        """
+        convert front car view to bird view
+        """
+        assert ops.exists(ipm_remap_file_path), '{:s} not exist'.format(ipm_remap_file_path)
+
+        self._cluster = _LaneNetCluster()
+        self._ipm_remap_file_path = ipm_remap_file_path
+
+        remap_file_load_ret = self._load_remap_matrix()
+        self._remap_to_ipm_x = remap_file_load_ret['remap_to_ipm_x']
+        self._remap_to_ipm_y = remap_file_load_ret['remap_to_ipm_y']
+
+        self._color_map = [np.array([255, 0, 0]),
+                           np.array([0, 255, 0]),
+                           np.array([0, 0, 255]),
+                           np.array([125, 125, 0]),
+                           np.array([0, 125, 125]),
+                           np.array([125, 0, 125]),
+                           np.array([50, 100, 50]),
+                           np.array([100, 50, 100])]
+
+    def _load_remap_matrix(self):
+        fs = cv2.FileStorage(self._ipm_remap_file_path, cv2.FILE_STORAGE_READ)
+
+        remap_to_ipm_x = fs.getNode('remap_ipm_x').mat()
+        remap_to_ipm_y = fs.getNode('remap_ipm_y').mat()
+
+        ret = {
+            'remap_to_ipm_x': remap_to_ipm_x,
+            'remap_to_ipm_y': remap_to_ipm_y,
+        }
+
+        fs.release()
+
+        return ret
+
+    def postprocess(self, binary_seg_result, instance_seg_result=None,
+                    min_area_threshold=100, source_image=None,
+                    data_source='tusimple'):
+
+        # convert binary_seg_result
+        binary_seg_result = np.array(binary_seg_result * 255, dtype=np.uint8)
+        # apply image morphology operation to fill in the hold and reduce the small area
+        morphological_ret = _morphological_process(binary_seg_result, kernel_size=5)
+        connect_components_analysis_ret = _connect_components_analysis(image=morphological_ret)
+
+        labels = connect_components_analysis_ret[1]
+        stats = connect_components_analysis_ret[2]
+        for index, stat in enumerate(stats):
+            if stat[4] <= min_area_threshold:
+                idx = np.where(labels == index)
+                morphological_ret[idx] = 0
+
+        # apply embedding features cluster
+        mask_image, lane_coords = self._cluster.apply_lane_feats_cluster(
+            binary_seg_result=morphological_ret,
+            instance_seg_result=instance_seg_result
+        )
+
+        if mask_image is None:
+            return {
+                'mask_image': None,
+                'fit_params': None,
+                'source_image': None,
+            }
+
+        # lane line fit
+        fit_params = []
+        src_lane_pts = []
+        for lane_index, coords in enumerate(lane_coords):
+            if data_source == 'tusimple':
+                tmp_mask = np.zeros(shape=(720, 1280), dtype=np.uint8)
+                tmp_mask[tuple((np.int_(coords[:, 1] * 720 / 256), np.int_(coords[:, 0] * 1280 / 512)))] = 255
+            else:
+                raise ValueError('Wrong data source now only support tusimple')
+            tmp_ipm_mask = cv2.remap(
+                tmp_mask,
+                self._remap_to_ipm_x,
+                self._remap_to_ipm_y,
+                interpolation=cv2.INTER_NEAREST
+            )
+            nonzero_y = np.array(tmp_ipm_mask.nonzero()[0])
+            nonzero_x = np.array(tmp_ipm_mask.nonzero()[1])
+
+            fit_param = np.polyfit(nonzero_y, nonzero_x, 2)
+            fit_params.append(fit_param)
+
+            [ipm_image_height, ipm_image_width] = tmp_ipm_mask.shape
+            plot_y = np.linspace(10, ipm_image_height, ipm_image_height - 10)
+            fit_x = fit_param[0] * plot_y ** 2 + fit_param[1] * plot_y + fit_param[2]
+
+            lane_pts = []
+            for index in range(0, plot_y.shape[0], 5):
+                src_x = self._remap_to_ipm_x[
+                    int(plot_y[index]), int(np.clip(fit_x[index], 0, ipm_image_width - 1))]
+                if src_x <= 0:
+                    continue
+                src_y = self._remap_to_ipm_y[
+                    int(plot_y[index]), int(np.clip(fit_x[index], 0, ipm_image_width - 1))]
+                src_y = src_y if src_y > 0 else 0
+
+                lane_pts.append([src_x, src_y])
+
+            src_lane_pts.append(lane_pts)
+
+        # tusimple test data sample point along y axis every 10 pixels
+        source_image_width = source_image.shape[1]
+        for index, single_lane_pts in enumerate(src_lane_pts):
+            single_lane_pt_x = np.array(single_lane_pts, dtype=np.float32)[:, 0]
+            single_lane_pt_y = np.array(single_lane_pts, dtype=np.float32)[:, 1]
+            if data_source == 'tusimple':
+                start_plot_y = 240
+                end_plot_y = 720
+            else:
+                raise ValueError('Wrong data source now only support tusimple')
+            step = int(math.floor((end_plot_y - start_plot_y) / 10))
+            for plot_y in np.linspace(start_plot_y, end_plot_y, step):
+                diff = single_lane_pt_y - plot_y
+                fake_diff_bigger_than_zero = diff.copy()
+                fake_diff_smaller_than_zero = diff.copy()
+                fake_diff_bigger_than_zero[np.where(diff <= 0)] = float('inf')
+                fake_diff_smaller_than_zero[np.where(diff > 0)] = float('-inf')
+                idx_low = np.argmax(fake_diff_smaller_than_zero)
+                idx_high = np.argmin(fake_diff_bigger_than_zero)
+
+                previous_src_pt_x = single_lane_pt_x[idx_low]
+                previous_src_pt_y = single_lane_pt_y[idx_low]
+                last_src_pt_x = single_lane_pt_x[idx_high]
+                last_src_pt_y = single_lane_pt_y[idx_high]
+
+                if previous_src_pt_y < start_plot_y or last_src_pt_y < start_plot_y or \
+                        fake_diff_smaller_than_zero[idx_low] == float('-inf') or \
+                        fake_diff_bigger_than_zero[idx_high] == float('inf'):
+                    continue
+
+                interpolation_src_pt_x = (abs(previous_src_pt_y - plot_y) * previous_src_pt_x +
+                                          abs(last_src_pt_y - plot_y) * last_src_pt_x) / \
+                                         (abs(previous_src_pt_y - plot_y) + abs(last_src_pt_y - plot_y))
+                interpolation_src_pt_y = (abs(previous_src_pt_y - plot_y) * previous_src_pt_y +
+                                          abs(last_src_pt_y - plot_y) * last_src_pt_y) / \
+                                         (abs(previous_src_pt_y - plot_y) + abs(last_src_pt_y - plot_y))
+
+                if interpolation_src_pt_x > source_image_width or interpolation_src_pt_x < 10:
+                    continue
+
+                lane_color = self._color_map[index].tolist()
+                cv2.circle(source_image, (int(interpolation_src_pt_x),
+                                          int(interpolation_src_pt_y)), 5, lane_color, -1)
+        ret = {
+            'mask_image': mask_image,
+            'fit_params': fit_params,
+            'source_image': source_image,
+        }
+        return ret

contrib/LaneNet/utils/timer.py

+#   Copyright (c) 2019  PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import time
+
+
+def calculate_eta(remaining_step, speed):
+    if remaining_step < 0:
+        remaining_step = 0
+    remaining_time = int(remaining_step / speed)
+    result = "{:0>2}:{:0>2}:{:0>2}"
+    arr = []
+    for i in range(2, -1, -1):
+        arr.append(int(remaining_time / 60**i))
+        remaining_time %= 60**i
+    return result.format(*arr)
+
+
+class Timer(object):
+    """ Simple timer class for measuring time consuming """
+
+    def __init__(self):
+        self._start_time = 0.0
+        self._end_time = 0.0
+        self._elapsed_time = 0.0
+        self._is_running = False
+
+    def start(self):
+        self._is_running = True
+        self._start_time = time.time()
+
+    def restart(self):
+        self.start()
+
+    def stop(self):
+        self._is_running = False
+        self._end_time = time.time()
+
+    def elapsed_time(self):
+        self._end_time = time.time()
+        self._elapsed_time = self._end_time - self._start_time
+        if not self.is_running:
+            return 0.0
+
+        return self._elapsed_time
+
+    @property
+    def is_running(self):
+        return self._is_running

contrib/LaneNet/vis.py

+# coding: utf8
+# copyright (c) 2019 PaddlePaddle Authors. All Rights Reserve.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import os
+# GPU memory garbage collection optimization flags
+os.environ['FLAGS_eager_delete_tensor_gb'] = "0.0"
+
+import sys
+
+cur_path = os.path.abspath(os.path.dirname(__file__))
+root_path = os.path.split(os.path.split(cur_path)[0])[0]
+sys.path.append(root_path)
+import matplotlib
+matplotlib.use('Agg')
+import time
+import argparse
+import pprint
+import cv2
+import numpy as np
+import paddle.fluid as fluid
+
+from utils.config import cfg
+from reader import LaneNetDataset
+from models.model_builder import build_model
+from models.model_builder import ModelPhase
+from utils import lanenet_postprocess
+import matplotlib.pyplot as plt
+
+def parse_args():
+    parser = argparse.ArgumentParser(description='PaddeSeg visualization tools')
+    parser.add_argument(
+        '--cfg',
+        dest='cfg_file',
+        help='Config file for training (and optionally testing)',
+        default=None,
+        type=str)
+    parser.add_argument(
+        '--use_gpu', dest='use_gpu', help='Use gpu or cpu', action='store_true')
+    parser.add_argument(
+        '--vis_dir',
+        dest='vis_dir',
+        help='visual save dir',
+        type=str,
+        default='visual')
+    parser.add_argument(
+        '--also_save_raw_results',
+        dest='also_save_raw_results',
+        help='whether to save raw result',
+        action='store_true')
+    parser.add_argument(
+        '--local_test',
+        dest='local_test',
+        help='if in local test mode, only visualize 5 images for testing',
+        action='store_true')
+    parser.add_argument(
+        'opts',
+        help='See config.py for all options',
+        default=None,
+        nargs=argparse.REMAINDER)
+    if len(sys.argv) == 1:
+        parser.print_help()
+        sys.exit(1)
+    return parser.parse_args()
+
+
+def makedirs(directory):
+    if not os.path.exists(directory):
+        os.makedirs(directory)
+
+
+def get_color_map(num_classes):
+    """ Returns the color map for visualizing the segmentation mask,
+        which can support arbitrary number of classes.
+    Args:
+        num_classes: Number of classes
+    Returns:
+        The color map
+    """
+    #color_map = num_classes * 3 *  [0]
+    color_map = num_classes * [[0, 0, 0]]
+    for i in range(0, num_classes):
+        j = 0
+        color_map[i] = [0, 0, 0]
+        lab = i
+        while lab:
+            color_map[i][0] |= (((lab >> 0) & 1) << (7 - j))
+            color_map[i][1] |= (((lab >> 1) & 1) << (7 - j))
+            color_map[i][2] |= (((lab >> 2) & 1) << (7 - j))
+            j += 1
+            lab >>= 3
+
+    return color_map
+
+
+def colorize(image, shape, color_map):
+    """
+    Convert segment result to color image.
+    """
+    color_map = np.array(color_map).astype("uint8")
+    # Use OpenCV LUT for color mapping
+    c1 = cv2.LUT(image, color_map[:, 0])
+    c2 = cv2.LUT(image, color_map[:, 1])
+    c3 = cv2.LUT(image, color_map[:, 2])
+    color_res = np.dstack((c1, c2, c3))
+
+    return color_res
+
+
+def to_png_fn(fn, name=""):
+    """
+    Append png as filename postfix
+    """
+    directory, filename = os.path.split(fn)
+    basename, ext = os.path.splitext(filename)
+
+    return basename + name + ".png"
+
+
+def minmax_scale(input_arr):
+    min_val = np.min(input_arr)
+    max_val = np.max(input_arr)
+
+    output_arr = (input_arr - min_val) * 255.0 / (max_val - min_val)
+
+    return output_arr
+
+
+
+def visualize(cfg,
+              vis_file_list=None,
+              use_gpu=False,
+              vis_dir="visual",
+              also_save_raw_results=False,
+              ckpt_dir=None,
+              log_writer=None,
+              local_test=False,
+              **kwargs):
+    if vis_file_list is None:
+        vis_file_list = cfg.DATASET.TEST_FILE_LIST
+
+
+    dataset = LaneNetDataset(
+        file_list=vis_file_list,
+        mode=ModelPhase.VISUAL,
+        shuffle=True,
+        data_dir=cfg.DATASET.DATA_DIR)
+
+    startup_prog = fluid.Program()
+    test_prog = fluid.Program()
+    pred, logit = build_model(test_prog, startup_prog, phase=ModelPhase.VISUAL)
+    # Clone forward graph
+    test_prog = test_prog.clone(for_test=True)
+
+    # Get device environment
+    place = fluid.CUDAPlace(0) if use_gpu else fluid.CPUPlace()
+    exe = fluid.Executor(place)
+    exe.run(startup_prog)
+
+    ckpt_dir = cfg.TEST.TEST_MODEL if not ckpt_dir else ckpt_dir
+
+    fluid.io.load_params(exe, ckpt_dir, main_program=test_prog)
+
+    save_dir = os.path.join(vis_dir, 'visual_results')
+    makedirs(save_dir)
+    if also_save_raw_results:
+        raw_save_dir = os.path.join(vis_dir, 'raw_results')
+        makedirs(raw_save_dir)
+
+    fetch_list = [pred.name, logit.name]
+    test_reader = dataset.batch(dataset.generator, batch_size=1, is_test=True)
+
+    postprocessor = lanenet_postprocess.LaneNetPostProcessor()
+    for imgs, grts, grts_instance, img_names, valid_shapes, org_imgs in test_reader:
+        segLogits, emLogits = exe.run(
+            program=test_prog,
+            feed={'image': imgs},
+            fetch_list=fetch_list,
+            return_numpy=True)
+        num_imgs = segLogits.shape[0]
+
+        for i in range(num_imgs):
+            gt_image = org_imgs[i]
+            binary_seg_image, instance_seg_image = segLogits[i].squeeze(-1), emLogits[i].transpose((1,2,0))
+
+            postprocess_result = postprocessor.postprocess(
+                binary_seg_result=binary_seg_image,
+                instance_seg_result=instance_seg_image,
+                source_image=gt_image
+            )
+            pred_binary_fn = os.path.join(save_dir, to_png_fn(img_names[i], name='_pred_binary'))
+            pred_lane_fn = os.path.join(save_dir, to_png_fn(img_names[i], name='_pred_lane'))
+            pred_instance_fn = os.path.join(save_dir, to_png_fn(img_names[i], name='_pred_instance'))
+            dirname = os.path.dirname(pred_binary_fn)
+
+            makedirs(dirname)
+            mask_image = postprocess_result['mask_image']
+            for i in range(4):
+                instance_seg_image[:, :, i] = minmax_scale(instance_seg_image[:, :, i])
+            embedding_image = np.array(instance_seg_image).astype(np.uint8)
+
+            plt.figure('mask_image')
+            plt.imshow(mask_image[:, :, (2, 1, 0)])
+            plt.figure('src_image')
+            plt.imshow(gt_image[:, :, (2, 1, 0)])
+            plt.figure('instance_image')
+            plt.imshow(embedding_image[:, :, (2, 1, 0)])
+            plt.figure('binary_image')
+            plt.imshow(binary_seg_image * 255, cmap='gray')
+            plt.show()
+
+            # from collections import
+            cv2.imwrite(pred_binary_fn, np.array(binary_seg_image * 255).astype(np.uint8))
+            cv2.imwrite(pred_lane_fn, postprocess_result['source_image'])
+            cv2.imwrite(pred_instance_fn, mask_image)
+            print(pred_lane_fn, 'saved!')
+
+
+
+if __name__ == '__main__':
+    args = parse_args()
+    if args.cfg_file is not None:
+        cfg.update_from_file(args.cfg_file)
+    if args.opts:
+        cfg.update_from_list(args.opts)
+    cfg.check_and_infer()
+    print(pprint.pformat(cfg))
+    visualize(cfg, **args.__dict__)

pdseg/loss.py

@@ -20,7 +20,7 @@ import importlib
 from utils.config import cfg
 
 
-def softmax_with_loss(logit, label, ignore_mask=None, num_classes=2):
+def softmax_with_loss(logit, label, ignore_mask=None, num_classes=2, weight=None):
     ignore_mask = fluid.layers.cast(ignore_mask, 'float32')
     label = fluid.layers.elementwise_min(
         label, fluid.layers.assign(np.array([num_classes - 1], dtype=np.int32)))
@@ -29,12 +29,37 @@ def softmax_with_loss(logit, label, ignore_mask=None, num_classes=2):
     label = fluid.layers.reshape(label, [-1, 1])
     label = fluid.layers.cast(label, 'int64')
     ignore_mask = fluid.layers.reshape(ignore_mask, [-1, 1])
-
+    if weight is None:
         loss, probs = fluid.layers.softmax_with_cross_entropy(
             logit,
             label,
             ignore_index=cfg.DATASET.IGNORE_INDEX,
             return_softmax=True)
+    else:
+        label_one_hot = fluid.layers.one_hot(input=label, depth=num_classes)
+        if isinstance(weight, list):
+            assert len(weight) == num_classes, "weight length must equal num of classes"
+            weight = fluid.layers.assign(np.array([weight], dtype='float32'))
+        elif isinstance(weight, fluid.layers.Variable):
+            pass
+        else:
+            tmp = []
+            total_num = fluid.layers.cast(fluid.layers.shape(label)[0], 'float32')
+            for i in range(num_classes):
+                cls_pixel_num = fluid.layers.reduce_sum(label_one_hot[:, i])
+                ratio = total_num / (cls_pixel_num + 1)
+                tmp.append(ratio)
+            weight = fluid.layers.concat(tmp)
+            weight = weight / fluid.layers.reduce_sum(weight) * num_classes
+        weight = fluid.layers.reshape(weight, [1, num_classes])
+        weighted_label_one_hot = fluid.layers.elementwise_mul(label_one_hot, weight)
+        probs = fluid.layers.softmax(logit)
+        loss = fluid.layers.cross_entropy(
+            probs,
+            weighted_label_one_hot,
+            soft_label=True,
+            ignore_index=cfg.DATASET.IGNORE_INDEX)
+        weighted_label_one_hot.stop_gradient = True
 
     loss = loss * ignore_mask
     avg_loss = fluid.layers.mean(loss) / fluid.layers.mean(ignore_mask)
@@ -80,7 +105,7 @@ def bce_loss(logit, label, ignore_mask=None):
     return loss
 
 
-def multi_softmax_with_loss(logits, label, ignore_mask=None, num_classes=2):
+def multi_softmax_with_loss(logits, label, ignore_mask=None, num_classes=2, weight=None):
     if isinstance(logits, tuple):
         avg_loss = 0
         for i, logit in enumerate(logits):
@@ -91,7 +116,7 @@ def multi_softmax_with_loss(logits, label, ignore_mask=None, num_classes=2):
                                      num_classes)
             avg_loss += cfg.MODEL.MULTI_LOSS_WEIGHT[i] * loss
     else:
-        avg_loss = softmax_with_loss(logits, label, ignore_mask, num_classes)
+        avg_loss = softmax_with_loss(logits, label, ignore_mask, num_classes, weight=weight)
     return avg_loss
 
 def multi_dice_loss(logits, label, ignore_mask=None):

pdseg/models/model_builder.py

@@ -177,8 +177,9 @@ def build_model(main_prog, start_prog, phase=ModelPhase.TRAIN):
                 avg_loss_list = []
                 valid_loss = []
                 if "softmax_loss" in loss_type:
+                    weight = cfg.SOLVER.CROSS_ENTROPY_WEIGHT
                     avg_loss_list.append(multi_softmax_with_loss(logits,
-                        label, mask,class_num))
+                        label, mask, class_num, weight))
                     loss_valid = True
                     valid_loss.append("softmax_loss")
                 if "dice_loss" in loss_type:

pdseg/utils/config.py

@@ -158,7 +158,9 @@ cfg.SOLVER.LOSS = ["softmax_loss"]
 cfg.SOLVER.LR_WARMUP = False 
 # warmup的迭代次数
 cfg.SOLVER.LR_WARMUP_STEPS = 2000 
-
+# cross entropy weight, 如果不为None，会根据每个batch中各个类别的数目，动态调整类别权重。
+# 也可以设置一个静态权重，比如有3类，每个类别权重可以设置为[0.1, 2.0, 0.9]
+cfg.SOLVER.CROSS_ENTROPY_WEIGHT = None
 ########################## 测试配置 ###########################################
 # 测试模型路径
 cfg.TEST.TEST_MODEL = ''