revise yolov3 tansformer and basemodel

demo/detection/yolov3_darknet53_pascalvoc/predict.py

@@ -6,4 +6,4 @@ if __name__ == '__main__':
     paddle.disable_static()
     model = model = hub.Module(name='yolov3_darknet53_pascalvoc', is_train=False)
     model.eval()
-    model.predict(imgpath="/PATH/TO/IMAGE", filelist="/PATH/TO/JSON/FILE")
+    model.predict(imgpath="4026.jpeg", filelist="/PATH/TO/JSON/FILE")

demo/detection/yolov3_darknet53_pascalvoc/train.py

@@ -3,18 +3,21 @@ import paddlehub as hub
 import paddle.nn as nn
 from paddlehub.finetune.trainer import Trainer
 from paddlehub.datasets.pascalvoc import DetectionData
-from paddlehub.process.transforms import DetectTrainReader, DetectTestReader
+from paddlehub.process.detect_transforms import Compose, RandomDistort, RandomExpand, RandomCrop, RandomFlip, Normalize, Resize, ShuffleBox
 
 if __name__ == "__main__":
     place = paddle.CUDAPlace(0)
     paddle.disable_static()
-    is_train = True
-    if is_train:
-        transform = DetectTrainReader()
+    transform = Compose([
+        RandomDistort(),
+        RandomExpand(fill=[0.485, 0.456, 0.406]),
+        RandomCrop(),
+        Resize(target_size=416),
+        RandomFlip(),
+        ShuffleBox(),
+        Normalize(mean=[0.485, 0.456, 0.406], std=[0.229, 0.224, 0.225])
+    ])
     train_reader = DetectionData(transform)
-    else:
-        transform = DetectTestReader()
-        test_reader = DetectionData(transform)
     model = hub.Module(name='yolov3_darknet53_pascalvoc')
     model.train()
     optimizer = paddle.optimizer.Adam(learning_rate=0.0001, parameters=model.parameters())

hub_module/modules/image/object_detection/yolov3_darknet53_pascalvoc/module.py

@@ -7,7 +7,7 @@ from paddle.nn.initializer import Normal, Constant
 from paddle.regularizer import L2Decay
 from pycocotools.coco import COCO
 from paddlehub.module.cv_module import Yolov3Module
-from paddlehub.process.transforms import DetectTrainReader, DetectTestReader
+from paddlehub.process.detect_transforms import Compose, RandomDistort, RandomExpand, RandomCrop, Resize, RandomFlip, ShuffleBox, Normalize
 from paddlehub.module.module import moduleinfo
 
 
@@ -286,12 +286,24 @@ class YOLOv3(nn.Layer):
             self.set_dict(model_dict)
             print("load pretrained checkpoint success")
 
-    def transform(self, img: paddle.Tensor, size: int):
+    def transform(self, img):
         if self.is_train:
-            transforms = DetectTrainReader()
+            transform = Compose([
+                RandomDistort(),
+                RandomExpand(fill=[0.485, 0.456, 0.406]),
+                RandomCrop(),
+                Resize(target_size=416),
+                RandomFlip(),
+                ShuffleBox(),
+                Normalize(mean=[0.485, 0.456, 0.406], std=[0.229, 0.224, 0.225])
+            ])
         else:
-            transforms = DetectTestReader()
-        return transforms(img, size)
+            transform = Compose([
+                Resize(target_size=416, interp='CUBIC'),
+                Normalize(mean=[0.485, 0.456, 0.406], std=[0.229, 0.224, 0.225])
+            ])
+
+        return transform(img)
 
     def get_label_infos(self, file_list: str):
         self.COCO = COCO(file_list)
@@ -301,23 +313,8 @@ class YOLOv3(nn.Layer):
             label_names.append(category['name'])
         return label_names
 
-    def forward(self,
-                inputs: paddle.Tensor,
-                gtbox: paddle.Tensor = None,
-                gtlabel: paddle.Tensor = None,
-                gtscore: paddle.Tensor = None,
-                im_shape: paddle.Tensor = None):
-
-        self.gtbox = gtbox
-        self.gtlabel = gtlabel
-        self.gtscore = gtscore
-        self.im_shape = im_shape
-        self.outputs = []
-        self.boxes = []
-        self.scores = []
-        self.losses = []
-        self.pred = []
-        self.downsample = 32
+    def forward(self, inputs: paddle.Tensor):
+        outputs = []
         blocks = self.block(inputs)
         route = None
         for i, block in enumerate(blocks):
@@ -325,58 +322,9 @@ class YOLOv3(nn.Layer):
                 block = paddle.concat([route, block], axis=1)
             route, tip = self.yolo_blocks[i](block)
             block_out = self.block_outputs[i](tip)
-            self.outputs.append(block_out)
+            outputs.append(block_out)
             if i < 2:
                 route = self.route_blocks_2[i](route)
                 route = self.upsample(route)
 
-        for i, out in enumerate(self.outputs):
-            anchor_mask = self.anchor_masks[i]
-
-            if self.is_train:
-                loss = F.yolov3_loss(x=out,
-                                     gt_box=self.gtbox,
-                                     gt_label=self.gtlabel,
-                                     gt_score=self.gtscore,
-                                     anchors=self.anchors,
-                                     anchor_mask=anchor_mask,
-                                     class_num=self.class_num,
-                                     ignore_thresh=self.ignore_thresh,
-                                     downsample_ratio=self.downsample,
-                                     use_label_smooth=False)
-            else:
-                loss = paddle.to_tensor(0.0)
-            self.losses.append(paddle.reduce_mean(loss))
-
-            mask_anchors = []
-            for m in anchor_mask:
-                mask_anchors.append((self.anchors[2 * m]))
-                mask_anchors.append(self.anchors[2 * m + 1])
-
-            boxes, scores = F.yolo_box(x=out,
-                                       img_size=self.im_shape,
-                                       anchors=mask_anchors,
-                                       class_num=self.class_num,
-                                       conf_thresh=self.valid_thresh,
-                                       downsample_ratio=self.downsample,
-                                       name="yolo_box" + str(i))
-
-            self.boxes.append(boxes)
-            self.scores.append(paddle.transpose(scores, perm=[0, 2, 1]))
-            self.downsample //= 2
-
-        for i in range(self.boxes[0].shape[0]):
-            yolo_boxes = paddle.unsqueeze(paddle.concat([self.boxes[0][i], self.boxes[1][i], self.boxes[2][i]], axis=0),
-                                          0)
-            yolo_scores = paddle.unsqueeze(
-                paddle.concat([self.scores[0][i], self.scores[1][i], self.scores[2][i]], axis=1), 0)
-            pred = F.multiclass_nms(bboxes=yolo_boxes,
-                                    scores=yolo_scores,
-                                    score_threshold=self.valid_thresh,
-                                    nms_top_k=self.nms_topk,
-                                    keep_top_k=self.nms_posk,
-                                    nms_threshold=self.nms_thresh,
-                                    background_label=-1)
-            self.pred.append(pred)
-
-        return sum(self.losses), self.pred
+        return outputs

paddlehub/datasets/pascalvoc.py

@@ -61,14 +61,10 @@ class DetectionData(paddle.io.Dataset):
         self.data = parse_images()
 
     def __getitem__(self, idx: int):
-        if self.mode == "train":
         img = self.data[idx]
-            out_img, gt_boxes, gt_labels, gt_scores = self.transform(img, 416)
+        im, data = self.transform(img)
+        out_img, gt_boxes, gt_labels, gt_scores = im, data['gt_boxes'], data['gt_labels'], data['gt_scores']
         return out_img, gt_boxes, gt_labels, gt_scores
-        elif self.mode == "test":
-            img = self.data[idx]
-            out_img, id, (h, w) = self.transform(img)
-            return out_img, id, (h, w)
 
     def __len__(self):
         return len(self.data)

paddlehub/module/cv_module.py

@@ -26,7 +26,8 @@ from PIL import Image
 
 from paddlehub.module.module import serving, RunModule
 from paddlehub.utils.utils import base64_to_cv2
-from paddlehub.process.transforms import ConvertColorSpace, ColorPostprocess, Resize, BoxTool
+from paddlehub.process.transforms import ConvertColorSpace, ColorPostprocess, Resize
+from paddlehub.process.functional import subtract_imagenet_mean_batch, gram_matrix, draw_boxes_on_image, img_shape
 
 
 class ImageServing(object):
@@ -218,38 +219,30 @@ class Yolov3Module(RunModule, ImageServing):
         Returns:
             results(dict) : The model outputs, such as metrics.
         '''
-        ious = []
-        boxtool = BoxTool()
         img = batch[0].astype('float32')
-        B, C, W, H = img.shape
-        im_shape = np.array([(W, H)] * B).astype('int32')
-        im_shape = paddle.to_tensor(im_shape)
-
-        gt_box = batch[1].astype('float32')
-        gt_label = batch[2].astype('int32')
-        gt_score = batch[3].astype("float32")
-        loss, pred = self(img, gt_box, gt_label, gt_score, im_shape)
-
-        for i in range(len(pred)):
-            bboxes = pred[i].numpy()
-            labels = bboxes[:, 0].astype('int32')
-            scores = bboxes[:, 1].astype('float32')
-            boxes = bboxes[:, 2:].astype('float32')
-            iou = []
-
-            for j, (box, score, label) in enumerate(zip(boxes, scores, labels)):
-                x1, y1, x2, y2 = box
-                w = x2 - x1 + 1
-                h = y2 - y1 + 1
-                bbox = [x1, y1, w, h]
-                bbox = np.expand_dims(boxtool.coco_anno_box_to_center_relative(bbox, H, W), 0)
-                gt = gt_box[i].numpy()
-                iou.append(max(boxtool.box_iou_xywh(bbox, gt)))
-
-            ious.append(max(iou))
-        ious = paddle.to_tensor(np.array(ious))
-
-        return {'loss': loss, 'metrics': {'iou': ious}}
+        gtbox = batch[1].astype('float32')
+        gtlabel = batch[2].astype('int32')
+        gtscore = batch[3].astype("float32")
+        losses = []
+        outputs = self(img)
+        self.downsample = 32
+
+        for i, out in enumerate(outputs):
+            anchor_mask = self.anchor_masks[i]
+            loss = F.yolov3_loss(x=out,
+                                 gt_box=gtbox,
+                                 gt_label=gtlabel,
+                                 gt_score=gtscore,
+                                 anchors=self.anchors,
+                                 anchor_mask=anchor_mask,
+                                 class_num=self.class_num,
+                                 ignore_thresh=self.ignore_thresh,
+                                 downsample_ratio=32,
+                                 use_label_smooth=False)
+            losses.append(paddle.reduce_mean(loss))
+            self.downsample //= 2
+
+        return {'loss': sum(losses)}
 
     def predict(self, imgpath: str, filelist: str, visualization: bool = True, save_path: str = 'result'):
         '''
@@ -266,28 +259,53 @@ class Yolov3Module(RunModule, ImageServing):
             scores(np.ndarray): Predict score.
             labels(np.ndarray): Predict labels.
         '''
-        boxtool = BoxTool()
-        img = {}
-        img['image'] = imgpath
-        img['id'] = 0
-        im, im_id, im_shape = self.transform(img, 416)
+        boxes = []
+        scores = []
+        self.downsample = 32
+        im = self.transform(imgpath)
+        h, w, c = img_shape(imgpath)
+        im_shape = paddle.to_tensor(np.array([[h, w]]).astype('int32'))
         label_names = self.get_label_infos(filelist)
-        img_data = np.array([im]).astype('float32')
-        img_data = paddle.to_tensor(img_data)
-        im_shape = np.array([im_shape]).astype('int32')
-        im_shape = paddle.to_tensor(im_shape)
-
-        output, pred = self(img_data, None, None, None, im_shape)
-
-        for i in range(len(pred)):
-            bboxes = pred[i].numpy()
+        img_data = paddle.to_tensor(np.array([im]).astype('float32'))
+
+        outputs = self(img_data)
+
+        for i, out in enumerate(outputs):
+            anchor_mask = self.anchor_masks[i]
+            mask_anchors = []
+            for m in anchor_mask:
+                mask_anchors.append((self.anchors[2 * m]))
+                mask_anchors.append(self.anchors[2 * m + 1])
+
+            box, score = F.yolo_box(x=out,
+                                    img_size=im_shape,
+                                    anchors=mask_anchors,
+                                    class_num=self.class_num,
+                                    conf_thresh=self.valid_thresh,
+                                    downsample_ratio=self.downsample,
+                                    name="yolo_box" + str(i))
+
+            boxes.append(box)
+            scores.append(paddle.transpose(score, perm=[0, 2, 1]))
+            self.downsample //= 2
+
+        yolo_boxes = paddle.concat(boxes, axis=1)
+        yolo_scores = paddle.concat(scores, axis=2)
+
+        pred = F.multiclass_nms(bboxes=yolo_boxes,
+                                scores=yolo_scores,
+                                score_threshold=self.valid_thresh,
+                                nms_top_k=self.nms_topk,
+                                keep_top_k=self.nms_posk,
+                                nms_threshold=self.nms_thresh,
+                                background_label=-1)
+
+        bboxes = pred.numpy()
         labels = bboxes[:, 0].astype('int32')
         scores = bboxes[:, 1].astype('float32')
         boxes = bboxes[:, 2:].astype('float32')
 
         if visualization:
-                if not os.path.exists(save_path):
-                    os.mkdir(save_path)
-                boxtool.draw_boxes_on_image(imgpath, boxes, scores, labels, label_names, 0.5)
+            draw_boxes_on_image(imgpath, boxes, scores, labels, label_names, 0.5)
 
         return boxes, scores, labels

paddlehub/process/detect_transforms.py

+import copy
+import os
+import random
+from typing import Callable
+
+import cv2
+import numpy as np
+import matplotlib
+import PIL
+from PIL import Image, ImageEnhance
+from matplotlib import pyplot as plt
+
+from paddlehub.process.functional import *
+
+matplotlib.use('Agg')
+
+
+class DetectCatagory:
+    """Load label name, id and map from detection dataset.
+
+    Args:
+        attrbox(Callable): Method to get detection attributes of images.
+        data_dir(str): Image dataset path.
+
+    Returns:
+        label_names(List(str)): The dataset label names.
+        label_ids(List(int)): The dataset label ids.
+        category_to_id_map(dict): Mapping relations of category and id for images.
+    """
+    def __init__(self, attrbox: Callable, data_dir: str):
+        self.attrbox = attrbox
+        self.img_dir = data_dir
+
+    def __call__(self):
+        self.categories = self.attrbox.loadCats(self.attrbox.getCatIds())
+        self.num_category = len(self.categories)
+        label_names = []
+        label_ids = []
+        for category in self.categories:
+            label_names.append(category['name'])
+            label_ids.append(int(category['id']))
+        category_to_id_map = {v: i for i, v in enumerate(label_ids)}
+        return label_names, label_ids, category_to_id_map
+
+
+class ParseImages:
+    """Prepare images for detection.
+
+    Args:
+        attrbox(Callable): Method to get detection attributes of images.
+        is_train(bool): Select the mode for train or test.
+        data_dir(str): Image dataset path.
+        category_to_id_map(dict): Mapping relations of category and id for images.
+
+    Returns:
+        imgs(dict): The input for detection model, it is a dict.
+    """
+    def __init__(self, attrbox: Callable, data_dir: str, category_to_id_map: dict):
+        self.attrbox = attrbox
+        self.img_dir = data_dir
+        self.category_to_id_map = category_to_id_map
+        self.parse_gt_annotations = GTAnotations(self.attrbox, self.category_to_id_map)
+
+    def __call__(self):
+        image_ids = self.attrbox.getImgIds()
+        image_ids.sort()
+        imgs = copy.deepcopy(self.attrbox.loadImgs(image_ids))
+
+        for img in imgs:
+            img['image'] = os.path.join(self.img_dir, img['file_name'])
+            assert os.path.exists(img['image']), "image {} not found.".format(img['image'])
+            box_num = 50
+            img['gt_boxes'] = np.zeros((box_num, 4), dtype=np.float32)
+            img['gt_labels'] = np.zeros((box_num), dtype=np.int32)
+            img = self.parse_gt_annotations(img)
+        return imgs
+
+
+class GTAnotations:
+    """Set gt boxes and gt labels for train.
+
+    Args:
+        attrbox(Callable): Method for get detection attributes for images.
+        category_to_id_map(dict): Mapping relations of category and id for images.
+        img(dict): Input for detection model.
+
+    Returns:
+        img(dict): Set specific value on the attributes of 'gt boxes' and 'gt labels' for input.
+    """
+    def __init__(self, attrbox: Callable, category_to_id_map: dict):
+        self.attrbox = attrbox
+        self.category_to_id_map = category_to_id_map
+
+    def __call__(self, img: dict):
+        img_height = img['height']
+        img_width = img['width']
+        anno = self.attrbox.loadAnns(self.attrbox.getAnnIds(imgIds=img['id'], iscrowd=None))
+        gt_index = 0
+
+        for target in anno:
+            if target['area'] < -1:
+                continue
+            if 'ignore' in target and target['ignore']:
+                continue
+            box = coco_anno_box_to_center_relative(target['bbox'], img_height, img_width)
+
+            if box[2] <= 0 and box[3] <= 0:
+                continue
+            img['gt_boxes'][gt_index] = box
+            img['gt_labels'][gt_index] = \
+                self.category_to_id_map[target['category_id']]
+            gt_index += 1
+            if gt_index >= 50:
+                break
+        return img
+
+
+class RandomDistort:
+    """ Distort the input image randomly.
+    Args:
+        lower(float): The lower bound value for enhancement, default is 0.5.
+        upper(float): The upper bound value for enhancement, default is 1.5.
+
+    Returns:
+        img(np.ndarray): Distorted image.
+        data(dict): Image info and label info.
+
+    """
+    def __init__(self, lower: float = 0.5, upper: float = 1.5):
+        self.lower = lower
+        self.upper = upper
+
+    def random_brightness(self, img: PIL.Image):
+        e = np.random.uniform(self.lower, self.upper)
+        return ImageEnhance.Brightness(img).enhance(e)
+
+    def random_contrast(self, img: PIL.Image):
+        e = np.random.uniform(self.lower, self.upper)
+        return ImageEnhance.Contrast(img).enhance(e)
+
+    def random_color(self, img: PIL.Image):
+        e = np.random.uniform(self.lower, self.upper)
+        return ImageEnhance.Color(img).enhance(e)
+
+    def __call__(self, img: np.ndarray, data: dict):
+        ops = [self.random_brightness, self.random_contrast, self.random_color]
+        np.random.shuffle(ops)
+        img = Image.fromarray(img)
+        img = ops[0](img)
+        img = ops[1](img)
+        img = ops[2](img)
+        img = np.asarray(img)
+
+        return img, data
+
+
+class RandomExpand:
+    """Randomly expand images and gt boxes by random ratio. It is a data enhancement operation for model training.
+    Args:
+        max_ratio(float): Max value for expansion ratio, default is 4.
+        fill(list): Initialize the pixel value of the image with the input fill value, default is None.
+        keep_ratio(bool): Whether image keeps ratio.
+        thresh(float): If random ratio does not exceed the thresh, return original images and gt boxes, default is 0.5.
+
+    Return:
+        img(np.ndarray): Distorted image.
+        data(dict): Image info and label info.
+
+    """
+    def __init__(self, max_ratio: float = 4., fill: list = None, keep_ratio: bool = True, thresh: float = 0.5):
+
+        self.max_ratio = max_ratio
+        self.fill = fill
+        self.keep_ratio = keep_ratio
+        self.thresh = thresh
+
+    def __call__(self, img: np.ndarray, data: dict):
+        gtboxes = data['gt_boxes']
+
+        if random.random() > self.thresh:
+            return img, data
+        if self.max_ratio < 1.0:
+            return img, data
+        h, w, c = img.shape
+
+        ratio_x = random.uniform(1, self.max_ratio)
+        if self.keep_ratio:
+            ratio_y = ratio_x
+        else:
+            ratio_y = random.uniform(1, self.max_ratio)
+
+        oh = int(h * ratio_y)
+        ow = int(w * ratio_x)
+        off_x = random.randint(0, ow - w)
+        off_y = random.randint(0, oh - h)
+
+        out_img = np.zeros((oh, ow, c))
+        if self.fill and len(self.fill) == c:
+            for i in range(c):
+                out_img[:, :, i] = self.fill[i] * 255.0
+
+        out_img[off_y:off_y + h, off_x:off_x + w, :] = img
+        gtboxes[:, 0] = ((gtboxes[:, 0] * w) + off_x) / float(ow)
+        gtboxes[:, 1] = ((gtboxes[:, 1] * h) + off_y) / float(oh)
+        gtboxes[:, 2] = gtboxes[:, 2] / ratio_x
+        gtboxes[:, 3] = gtboxes[:, 3] / ratio_y
+        data['gt_boxes'] = gtboxes
+        img = out_img.astype('uint8')
+
+        return img, data
+
+
+class RandomCrop:
+    """
+    Random crop the input image according to constraints.
+    Args:
+        scales(list): The value of the cutting area relative to the original area, expressed in the form of \
+                      [min, max]. The default value is [.3, 1.].
+        max_ratio(float): Max ratio of the original area relative to the cutting area, default is 2.0.
+        constraints(list): The value of min and max iou values, default is None.
+        max_trial(int): The max trial for finding a valid crop area. The default value is 50.
+
+    Returns:
+        img(np.ndarray): Distorted image.
+        data(dict): Image info and label info.
+
+    """
+    def __init__(self,
+                 scales: list = [0.3, 1.0],
+                 max_ratio: float = 2.0,
+                 constraints: list = None,
+                 max_trial: int = 50):
+        self.scales = scales
+        self.max_ratio = max_ratio
+        self.constraints = constraints
+        self.max_trial = max_trial
+
+    def __call__(self, img: np.ndarray, data: dict):
+        boxes = data['gt_boxes']
+        labels = data['gt_labels']
+        scores = data['gt_scores']
+
+        if len(boxes) == 0:
+            return img, data
+        if not self.constraints:
+            self.constraints = [(0.1, 1.0), (0.3, 1.0), (0.5, 1.0), (0.7, 1.0), (0.9, 1.0), (0.0, 1.0)]
+
+        img = Image.fromarray(img)
+        w, h = img.size
+        crops = [(0, 0, w, h)]
+        for min_iou, max_iou in self.constraints:
+            for _ in range(self.max_trial):
+                scale = random.uniform(self.scales[0], self.scales[1])
+                aspect_ratio = random.uniform(max(1 / self.max_ratio, scale * scale), \
+                                              min(self.max_ratio, 1 / scale / scale))
+                crop_h = int(h * scale / np.sqrt(aspect_ratio))
+                crop_w = int(w * scale * np.sqrt(aspect_ratio))
+                crop_x = random.randrange(w - crop_w)
+                crop_y = random.randrange(h - crop_h)
+                crop_box = np.array([[(crop_x + crop_w / 2.0) / w, (crop_y + crop_h / 2.0) / h, crop_w / float(w),
+                                      crop_h / float(h)]])
+                iou = box_iou_xywh(crop_box, boxes)
+                if min_iou <= iou.min() and max_iou >= iou.max():
+                    crops.append((crop_x, crop_y, crop_w, crop_h))
+                    break
+
+        while crops:
+            crop = crops.pop(np.random.randint(0, len(crops)))
+            crop_boxes, crop_labels, crop_scores, box_num = box_crop(boxes, labels, scores, crop, (w, h))
+
+            if box_num < 1:
+                continue
+            img = img.crop((crop[0], crop[1], crop[0] + crop[2], crop[1] + crop[3])).resize(img.size, Image.LANCZOS)
+            img = np.asarray(img)
+            data['gt_boxes'] = crop_boxes
+            data['gt_labels'] = crop_labels
+            data['gt_scores'] = crop_scores
+            return img, data
+        img = np.asarray(img)
+        data['gt_boxes'] = boxes
+        data['gt_labels'] = labels
+        data['gt_scores'] = scores
+        return img, data
+
+
+class RandomFlip:
+    """Flip the images and gt boxes randomly.
+    Args:
+        thresh: Probability for random flip.
+    Returns:
+        img(np.ndarray): Distorted image.
+        data(dict): Image info and label info.
+    """
+    def __init__(self, thresh: float = 0.5):
+        self.thresh = thresh
+
+    def __call__(self, img, data):
+        gtboxes = data['gt_boxes']
+        if random.random() > self.thresh:
+            img = img[:, ::-1, :]
+            gtboxes[:, 0] = 1.0 - gtboxes[:, 0]
+        data['gt_boxes'] = gtboxes
+        return img, data
+
+
+class Compose:
+    """Preprocess the input data according to the operators.
+    Args:
+        transforms(list): Preprocessing operators.
+    Returns:
+        img(np.ndarray): Preprocessed image.
+        data(dict): Image info and label info, default is None.
+    """
+    def __init__(self, transforms: list):
+        if not isinstance(transforms, list):
+            raise TypeError('The transforms must be a list!')
+        if len(transforms) < 1:
+            raise ValueError('The length of transforms ' + \
+                             'must be equal or larger than 1!')
+        self.transforms = transforms
+
+    def __call__(self, data: dict):
+
+        if isinstance(data, dict):
+            if isinstance(data['image'], str):
+                img = cv2.imread(data['image'])
+                img = cv2.cvtColor(img, cv2.COLOR_BGR2RGB)
+            gt_labels = data['gt_labels'].copy()
+            data['gt_scores'] = np.ones_like(gt_labels)
+            for op in self.transforms:
+                img, data = op(img, data)
+            img = img.transpose((2, 0, 1))
+            return img, data
+
+        if isinstance(data, str):
+            img = cv2.imread(data)
+            img = cv2.cvtColor(img, cv2.COLOR_BGR2RGB)
+            for op in self.transforms:
+                img, data = op(img, data)
+            img = img.transpose((2, 0, 1))
+            return img
+
+
+class Resize:
+    """Resize the input images.
+    Args:
+        target_size(int): Targeted input size.
+        interp(str): Interpolation method.
+    Returns:
+        img(np.ndarray): Preprocessed image.
+        data(dict): Image info and label info, default is None.
+    """
+    def __init__(self, target_size: int = 512, interp: str = 'RANDOM'):
+        self.interp_dict = {
+            'NEAREST': cv2.INTER_NEAREST,
+            'LINEAR': cv2.INTER_LINEAR,
+            'CUBIC': cv2.INTER_CUBIC,
+            'AREA': cv2.INTER_AREA,
+            'LANCZOS4': cv2.INTER_LANCZOS4
+        }
+        self.interp = interp
+        if not (interp == "RANDOM" or interp in self.interp_dict):
+            raise ValueError("interp should be one of {}".format(self.interp_dict.keys()))
+        if isinstance(target_size, list) or isinstance(target_size, tuple):
+            if len(target_size) != 2:
+                raise TypeError(
+                    'when target is list or tuple, it should include 2 elements, but it is {}'.format(target_size))
+        elif not isinstance(target_size, int):
+            raise TypeError("Type of target_size is invalid. Must be Integer or List or tuple, now is {}".format(
+                type(target_size)))
+
+        self.target_size = target_size
+
+    def __call__(self, img, data=None):
+
+        if self.interp == "RANDOM":
+            interp = random.choice(list(self.interp_dict.keys()))
+        else:
+            interp = self.interp
+        img = resize(img, self.target_size, self.interp_dict[interp])
+        if data is not None:
+            return img, data
+        else:
+            return img
+
+
+class Normalize:
+    """Normalize the input images.
+    Args:
+        mean(list): Mean values for normalization, default is [0.5, 0.5, 0.5].
+        std(list): Standard deviation for normalization, default is [0.5, 0.5, 0.5].
+    Returns:
+        img(np.ndarray): Preprocessed image.
+        data(dict): Image info and label info, default is None.
+    """
+    def __init__(self, mean=[0.5, 0.5, 0.5], std=[0.5, 0.5, 0.5]):
+        self.mean = mean
+        self.std = std
+        if not (isinstance(self.mean, list) and isinstance(self.std, list)):
+            raise ValueError("{}: input type is invalid.".format(self))
+        from functools import reduce
+        if reduce(lambda x, y: x * y, self.std) == 0:
+            raise ValueError('{}: std is invalid!'.format(self))
+
+    def __call__(self, im, data=None):
+        if data is not None:
+            mean = np.array(self.mean)[np.newaxis, np.newaxis, :]
+            std = np.array(self.std)[np.newaxis, np.newaxis, :]
+            im = normalize(im, mean, std)
+            return im, data
+        else:
+            mean = np.array(self.mean)[np.newaxis, np.newaxis, :]
+            std = np.array(self.std)[np.newaxis, np.newaxis, :]
+            im = normalize(im, mean, std)
+            return im
+
+
+class ShuffleBox:
+    """Shuffle data information."""
+    def __call__(self, img, data):
+        gt = np.concatenate([data['gt_boxes'], data['gt_labels'][:, np.newaxis], data['gt_scores'][:, np.newaxis]],
+                            axis=1)
+        idx = np.arange(gt.shape[0])
+        np.random.shuffle(idx)
+        gt = gt[idx, :]
+        data['gt_boxes'], data['gt_labels'], data['gt_scores'] = gt[:, :4], gt[:, 4], gt[:, 5]
+        return img, data

paddlehub/process/functional.py

@@ -11,12 +11,16 @@
 # 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 os
 
 import cv2
+import paddle
+import matplotlib
 import numpy as np
 from PIL import Image, ImageEnhance
+from matplotlib import pyplot as plt
+
+matplotlib.use('Agg')
 
 
 def normalize(im, mean, std):
@@ -118,3 +122,138 @@ def get_img_file(dir_name: str) -> list:
             images.append(img_path)
     images.sort()
     return images
+
+
+def coco_anno_box_to_center_relative(box: list, img_height: int, img_width: int) -> np.ndarray:
+    """
+    Convert COCO annotations box with format [x1, y1, w, h] to
+    center mode [center_x, center_y, w, h] and divide image width
+    and height to get relative value in range[0, 1]
+    """
+    assert len(box) == 4, "box should be a len(4) list or tuple"
+    x, y, w, h = box
+
+    x1 = max(x, 0)
+    x2 = min(x + w - 1, img_width - 1)
+    y1 = max(y, 0)
+    y2 = min(y + h - 1, img_height - 1)
+
+    x = (x1 + x2) / 2 / img_width
+    y = (y1 + y2) / 2 / img_height
+    w = (x2 - x1) / img_width
+    h = (y2 - y1) / img_height
+
+    return np.array([x, y, w, h])
+
+
+def box_crop(boxes: np.ndarray, labels: np.ndarray, scores: np.ndarray, crop: list, img_shape: list):
+    """Crop the boxes ,labels, scores according to the given shape"""
+
+    x, y, w, h = map(float, crop)
+    im_w, im_h = map(float, img_shape)
+
+    boxes = boxes.copy()
+    boxes[:, 0], boxes[:, 2] = (boxes[:, 0] - boxes[:, 2] / 2) * im_w, (boxes[:, 0] + boxes[:, 2] / 2) * im_w
+    boxes[:, 1], boxes[:, 3] = (boxes[:, 1] - boxes[:, 3] / 2) * im_h, (boxes[:, 1] + boxes[:, 3] / 2) * im_h
+
+    crop_box = np.array([x, y, x + w, y + h])
+    centers = (boxes[:, :2] + boxes[:, 2:]) / 2.0
+    mask = np.logical_and(crop_box[:2] <= centers, centers <= crop_box[2:]).all(axis=1)
+
+    boxes[:, :2] = np.maximum(boxes[:, :2], crop_box[:2])
+    boxes[:, 2:] = np.minimum(boxes[:, 2:], crop_box[2:])
+    boxes[:, :2] -= crop_box[:2]
+    boxes[:, 2:] -= crop_box[:2]
+
+    mask = np.logical_and(mask, (boxes[:, :2] < boxes[:, 2:]).all(axis=1))
+    boxes = boxes * np.expand_dims(mask.astype('float32'), axis=1)
+    labels = labels * mask.astype('float32')
+    scores = scores * mask.astype('float32')
+    boxes[:, 0], boxes[:, 2] = (boxes[:, 0] + boxes[:, 2]) / 2 / w, (boxes[:, 2] - boxes[:, 0]) / w
+    boxes[:, 1], boxes[:, 3] = (boxes[:, 1] + boxes[:, 3]) / 2 / h, (boxes[:, 3] - boxes[:, 1]) / h
+
+    return boxes, labels, scores, mask.sum()
+
+
+def box_iou_xywh(box1: np.ndarray, box2: np.ndarray) -> float:
+    """Calculate iou by xywh"""
+
+    assert box1.shape[-1] == 4, "Box1 shape[-1] should be 4."
+    assert box2.shape[-1] == 4, "Box2 shape[-1] should be 4."
+
+    b1_x1, b1_x2 = box1[:, 0] - box1[:, 2] / 2, box1[:, 0] + box1[:, 2] / 2
+    b1_y1, b1_y2 = box1[:, 1] - box1[:, 3] / 2, box1[:, 1] + box1[:, 3] / 2
+    b2_x1, b2_x2 = box2[:, 0] - box2[:, 2] / 2, box2[:, 0] + box2[:, 2] / 2
+    b2_y1, b2_y2 = box2[:, 1] - box2[:, 3] / 2, box2[:, 1] + box2[:, 3] / 2
+
+    inter_x1 = np.maximum(b1_x1, b2_x1)
+    inter_x2 = np.minimum(b1_x2, b2_x2)
+    inter_y1 = np.maximum(b1_y1, b2_y1)
+    inter_y2 = np.minimum(b1_y2, b2_y2)
+    inter_w = inter_x2 - inter_x1
+    inter_h = inter_y2 - inter_y1
+    inter_w[inter_w < 0] = 0
+    inter_h[inter_h < 0] = 0
+
+    inter_area = inter_w * inter_h
+    b1_area = (b1_x2 - b1_x1) * (b1_y2 - b1_y1)
+    b2_area = (b2_x2 - b2_x1) * (b2_y2 - b2_y1)
+
+    return inter_area / (b1_area + b2_area - inter_area)
+
+
+def draw_boxes_on_image(image_path: str,
+                        boxes: np.ndarray,
+                        scores: np.ndarray,
+                        labels: np.ndarray,
+                        label_names: list,
+                        score_thresh: float = 0.5):
+    """Draw boxes on images."""
+    image = np.array(Image.open(image_path))
+    plt.figure()
+    _, ax = plt.subplots(1)
+    ax.imshow(image)
+
+    image_name = image_path.split('/')[-1]
+    print("Image {} detect: ".format(image_name))
+    colors = {}
+    for box, score, label in zip(boxes, scores, labels):
+        if score < score_thresh:
+            continue
+        if box[2] <= box[0] or box[3] <= box[1]:
+            continue
+        label = int(label)
+        if label not in colors:
+            colors[label] = plt.get_cmap('hsv')(label / len(label_names))
+        x1, y1, x2, y2 = box[0], box[1], box[2], box[3]
+        rect = plt.Rectangle((x1, y1), x2 - x1, y2 - y1, fill=False, linewidth=2.0, edgecolor=colors[label])
+        ax.add_patch(rect)
+        ax.text(x1,
+                y1,
+                '{} {:.4f}'.format(label_names[label], score),
+                verticalalignment='bottom',
+                horizontalalignment='left',
+                bbox={
+                    'facecolor': colors[label],
+                    'alpha': 0.5,
+                    'pad': 0
+                },
+                fontsize=8,
+                color='white')
+        print("\t {:15s} at {:25} score: {:.5f}".format(label_names[int(label)], str(list(map(int, list(box)))), score))
+    image_name = image_name.replace('jpg', 'png')
+    plt.axis('off')
+    plt.gca().xaxis.set_major_locator(plt.NullLocator())
+    plt.gca().yaxis.set_major_locator(plt.NullLocator())
+    plt.savefig("./output/{}".format(image_name), bbox_inches='tight', pad_inches=0.0)
+    print("Detect result save at ./output/{}\n".format(image_name))
+    plt.cla()
+    plt.close('all')
+
+
+def img_shape(img_path: str):
+    """Get image shape."""
+    im = cv2.imread(img_path)
+    im = cv2.cvtColor(im, cv2.COLOR_BGR2RGB)
+    h, w, c = im.shape
+    return h, w, c