add solov2 model (#1412)

* add solov2 model

* fix train batch size

* add solov2_r101_vd_fpn_3x

* fix batch size and update modelzoo

* refactor code of solov2

* fix deploy/python

configs/solov2/README.md

+# SOLOv2 for instance segmentation
+
+## Introduction
+
+SOLOv2 (Segmenting Objects by Locations) is a fast instance segmentation framework with strong performance. We reproduced the model of the paper, and improved and optimized the accuracy and speed of the SOLOv2.
+
+** Highlights: **
+- Performance: `Light-R50-VD-DCN-FPN` model reached 38.6 FPS on single Tesla V100, and mask ap on the COCO-val dataset reached 38.8, which increased inference speed by 24%, mAP increased by 2.4 percentage points.
+- Training Time: The training time of the model of `solov2_r50_fpn_1x` on Tesla v100 with 8 GPU is only 10 hours.
+
+
+## Model Zoo
+
+| Backbone                | Multi-scale training  | Lr schd | Inf time (V100) | Mask AP |         Download                  | Configs |
+| :---------------------: | :-------------------: | :-----: | :------------: | :-----: | :---------: | :------------------------: |
+| R50-FPN                 |  False                |   1x    |     45.7ms          |  35.6   | [model](https://paddlemodels.bj.bcebos.com/object_detection/solov2_r50_fpn_1x.pdparams) | [config](https://github.com/PaddlePaddle/PaddleDetection/tree/master/configs/solov2/solov2_r50_fpn_1x.yml) |
+| R50-FPN                 |  True                |   3x    |     45.7ms          |  37.9   | [model](https://paddlemodels.bj.bcebos.com/object_detection/solov2_r50_fpn_3x.pdparams) | [config](https://github.com/PaddlePaddle/PaddleDetection/tree/master/configs/solov2/solov2_r50_fpn_3x.yml) |
+| R101-VD-FPN                 |  True               |   3x    |     -          |  42.6   | [model](https://paddlemodels.bj.bcebos.com/object_detection/solov2_r101_vd_fpn_3x.pdparams) | [config](https://github.com/PaddlePaddle/PaddleDetection/tree/master/configs/solov2/solov2_r101_vd_fpn_3x.yml) |
+
+## Enhanced model
+| Backbone                | Input size  | Lr schd | Inf time (V100) | Mask AP |         Download                  | Configs |
+| :---------------------: | :-------------------: | :-----: | :------------: | :-----: | :---------: | :------------------------: |
+| Light-R50-VD-DCN-FPN          |  512     |   3x    |     25.9ms          |  38.8   | [model](https://paddlemodels.bj.bcebos.com/object_detection/solov2_light_r50_vd_fpn_dcn_512_3x.pdparams) | [config](https://github.com/PaddlePaddle/PaddleDetection/tree/master/configs/solov2/solov2_light_r50_vd_fpn_dcn_512_3x.yml) |
+
+## Citations
+```
+@article{wang2020solov2,
+  title={SOLOv2: Dynamic, Faster and Stronger},
+  author={Wang, Xinlong and Zhang, Rufeng and  Kong, Tao and Li, Lei and Shen, Chunhua},
+  journal={arXiv preprint arXiv:2003.10152},
+  year={2020}
+}
+```

configs/solov2/solov2_light_reader.yml

+TrainReader:
+  batch_size: 2
+  worker_num: 2
+  inputs_def:
+    fields: ['image', 'im_id', 'gt_segm']
+  dataset:
+    !COCODataSet
+    dataset_dir: dataset/coco
+    anno_path: annotations/instances_train2017.json
+    image_dir: train2017
+  sample_transforms:
+  - !DecodeImage
+    to_rgb: true
+  - !Poly2Mask {}
+  - !ColorDistort {}
+  - !RandomCrop
+    is_mask_crop: True
+  - !ResizeImage
+    target_size: [352, 384, 416, 448, 480, 512]
+    max_size: 852
+    interp: 1
+    use_cv2: true
+    resize_box: true
+  - !RandomFlipImage
+    prob: 0.5
+  - !NormalizeImage
+    is_channel_first: false
+    is_scale: true
+    mean: [0.485,0.456,0.406]
+    std: [0.229, 0.224,0.225]
+  - !Permute
+    to_bgr: false
+    channel_first: true
+  batch_transforms:
+  - !PadBatch
+    pad_to_stride: 32
+  - !Gt2Solov2Target
+    num_grids: [40, 36, 24, 16, 12]
+    scale_ranges: [[1, 64], [32, 128], [64, 256], [128, 512], [256, 2048]]
+    coord_sigma: 0.2
+  shuffle: True
+
+EvalReader:
+  inputs_def:
+    fields: ['image', 'im_info', 'im_id']
+  dataset:
+    !COCODataSet
+    image_dir: val2017
+    anno_path: annotations/instances_val2017.json
+    dataset_dir: dataset/coco
+  sample_transforms:
+  - !DecodeImage
+    to_rgb: true
+  - !ResizeImage
+    interp: 1
+    max_size: 852
+    target_size: 512
+    use_cv2: true
+  - !NormalizeImage
+    is_channel_first: false
+    is_scale: true
+    mean: [0.485,0.456,0.406]
+    std: [0.229, 0.224,0.225]
+  - !Permute
+    channel_first: true
+    to_bgr: false
+  batch_transforms:
+  - !PadBatch
+    pad_to_stride: 32
+    use_padded_im_info: false
+  # only support batch_size=1 when evaluation
+  batch_size: 1
+  shuffle: false
+  drop_last: false
+  drop_empty: false
+  worker_num: 2
+
+TestReader:
+  inputs_def:
+    fields: ['image', 'im_info', 'im_id', 'im_shape']
+  dataset:
+    !ImageFolder
+    anno_path: dataset/coco/annotations/instances_val2017.json
+  sample_transforms:
+  - !DecodeImage
+    to_rgb: true
+  - !ResizeImage
+    interp: 1
+    max_size: 852
+    target_size: 512
+    use_cv2: true
+  - !NormalizeImage
+    is_channel_first: false
+    is_scale: true
+    mean: [0.485,0.456,0.406]
+    std: [0.229, 0.224,0.225]
+  - !Permute
+    channel_first: true
+    to_bgr: false
+  batch_transforms:
+  - !PadBatch
+    pad_to_stride: 32
+    use_padded_im_info: false

configs/solov2/solov2_r101_vd_fpn_3x.yml

+architecture: SOLOv2
+use_gpu: true
+max_iters: 270000
+snapshot_iter: 30000
+log_smooth_window: 20
+save_dir: output
+pretrain_weights: https://paddle-imagenet-models-name.bj.bcebos.com/ResNet101_vd_pretrained.tar
+metric: COCO
+weights: output/solov2_r101_vd_fpn_3x/model_final
+num_classes: 81
+use_ema: true
+ema_decay: 0.9998
+
+SOLOv2:
+  backbone: ResNet
+  fpn: FPN
+  bbox_head: SOLOv2Head
+  mask_head: SOLOv2MaskHead
+
+ResNet:
+  depth: 101
+  feature_maps: [2, 3, 4, 5]
+  freeze_at: 2
+  norm_type: bn
+  dcn_v2_stages: [3, 4, 5]
+  variant: d
+
+FPN:
+  max_level: 6
+  min_level: 2
+  num_chan: 256
+  spatial_scale: [0.03125, 0.0625, 0.125, 0.25]
+  reverse_out: True
+
+SOLOv2Head:
+  seg_feat_channels: 512
+  stacked_convs: 4
+  num_grids: [40, 36, 24, 16, 12]
+  kernel_out_channels: 256
+  solov2_loss: SOLOv2Loss
+  mask_nms: MaskMatrixNMS
+  dcn_v2_stages: [0, 1, 2, 3]
+
+SOLOv2MaskHead:
+  in_channels: 128
+  out_channels: 256
+  start_level: 0
+  end_level: 3
+  use_dcn_in_tower: True
+
+SOLOv2Loss:
+  ins_loss_weight: 3.0
+  focal_loss_gamma: 2.0
+  focal_loss_alpha: 0.25
+
+MaskMatrixNMS:
+  pre_nms_top_n: 500
+  post_nms_top_n: 100
+
+LearningRate:
+  base_lr: 0.01
+  schedulers:
+  - !PiecewiseDecay
+    gamma: 0.1
+    milestones: [180000, 240000]
+  - !LinearWarmup
+    start_factor: 0.
+    steps: 1000
+
+OptimizerBuilder:
+  optimizer:
+    momentum: 0.9
+    type: Momentum
+  regularizer:
+    factor: 0.0001
+    type: L2
+
+_READER_: 'solov2_reader.yml'
+TrainReader:
+  sample_transforms:
+  - !DecodeImage
+    to_rgb: true
+  - !Poly2Mask {}
+  - !ResizeImage
+    target_size: [640, 672, 704, 736, 768, 800]
+    max_size: 1333
+    interp: 1
+    use_cv2: true
+    resize_box: true
+  - !RandomFlipImage
+    prob: 0.5
+  - !NormalizeImage
+    is_channel_first: false
+    is_scale: true
+    mean: [0.485,0.456,0.406]
+    std: [0.229, 0.224,0.225]
+  - !Permute
+    to_bgr: false
+    channel_first: true
+  batch_transforms:
+  - !PadBatch
+    pad_to_stride: 32
+  - !Gt2Solov2Target
+    num_grids: [40, 36, 24, 16, 12]
+    scale_ranges: [[1, 96], [48, 192], [96, 384], [192, 768], [384, 2048]]
+    coord_sigma: 0.2

configs/solov2/solov2_r50_fpn_1x.yml

+architecture: SOLOv2
+use_gpu: true
+max_iters: 90000
+snapshot_iter: 10000
+log_smooth_window: 20
+save_dir: output
+pretrain_weights: https://paddle-imagenet-models-name.bj.bcebos.com/ResNet50_cos_pretrained.tar
+metric: COCO
+weights: output/solov2_r50_fpn_1x/model_final
+num_classes: 81
+
+SOLOv2:
+  backbone: ResNet
+  fpn: FPN
+  bbox_head: SOLOv2Head
+  mask_head: SOLOv2MaskHead
+
+ResNet:
+  depth: 50
+  feature_maps: [2, 3, 4, 5]
+  freeze_at: 2
+  norm_type: bn
+
+FPN:
+  max_level: 6
+  min_level: 2
+  num_chan: 256
+  spatial_scale: [0.03125, 0.0625, 0.125, 0.25]
+  reverse_out: True
+
+SOLOv2Head:
+  seg_feat_channels: 512
+  stacked_convs: 4
+  num_grids: [40, 36, 24, 16, 12]
+  kernel_out_channels: 256
+  solov2_loss: SOLOv2Loss
+  mask_nms: MaskMatrixNMS
+
+SOLOv2MaskHead:
+  in_channels: 128
+  out_channels: 256
+  start_level: 0
+  end_level: 3
+
+SOLOv2Loss:
+  ins_loss_weight: 3.0
+  focal_loss_gamma: 2.0
+  focal_loss_alpha: 0.25
+
+MaskMatrixNMS:
+  pre_nms_top_n: 500
+  post_nms_top_n: 100
+
+LearningRate:
+  base_lr: 0.01
+  schedulers:
+  - !PiecewiseDecay
+    gamma: 0.1
+    milestones: [60000, 80000]
+  - !LinearWarmup
+    start_factor: 0.
+    steps: 1000
+
+OptimizerBuilder:
+  optimizer:
+    momentum: 0.9
+    type: Momentum
+  regularizer:
+    factor: 0.0001
+    type: L2
+
+_READER_: 'solov2_reader.yml'

configs/solov2/solov2_r50_fpn_3x.yml

+architecture: SOLOv2
+use_gpu: true
+max_iters: 270000
+snapshot_iter: 30000
+log_smooth_window: 20
+save_dir: output
+pretrain_weights: https://paddle-imagenet-models-name.bj.bcebos.com/ResNet50_cos_pretrained.tar
+metric: COCO
+weights: output/solov2/solov2_r50_fpn_3x/model_final
+num_classes: 81
+
+SOLOv2:
+  backbone: ResNet
+  fpn: FPN
+  bbox_head: SOLOv2Head
+  mask_head: SOLOv2MaskHead
+
+ResNet:
+  depth: 50
+  feature_maps: [2, 3, 4, 5]
+  freeze_at: 2
+  norm_type: bn
+
+FPN:
+  max_level: 6
+  min_level: 2
+  num_chan: 256
+  spatial_scale: [0.03125, 0.0625, 0.125, 0.25]
+  reverse_out: True
+
+SOLOv2Head:
+  seg_feat_channels: 512
+  stacked_convs: 4
+  num_grids: [40, 36, 24, 16, 12]
+  kernel_out_channels: 256
+  solov2_loss: SOLOv2Loss
+  mask_nms: MaskMatrixNMS
+
+SOLOv2MaskHead:
+  in_channels: 128
+  out_channels: 256
+  start_level: 0
+  end_level: 3
+
+SOLOv2Loss:
+  ins_loss_weight: 3.0
+  focal_loss_gamma: 2.0
+  focal_loss_alpha: 0.25
+
+MaskMatrixNMS:
+  pre_nms_top_n: 500
+  post_nms_top_n: 100
+
+LearningRate:
+  base_lr: 0.01
+  schedulers:
+  - !PiecewiseDecay
+    gamma: 0.1
+    milestones: [180000, 240000]
+  - !LinearWarmup
+    start_factor: 0.
+    steps: 1000
+
+OptimizerBuilder:
+  optimizer:
+    momentum: 0.9
+    type: Momentum
+  regularizer:
+    factor: 0.0001
+    type: L2
+
+_READER_: 'solov2_reader.yml'
+TrainReader:
+  sample_transforms:
+  - !DecodeImage
+    to_rgb: true
+  - !Poly2Mask {}
+  - !ResizeImage
+    target_size: [640, 672, 704, 736, 768, 800]
+    max_size: 1333
+    interp: 1
+    use_cv2: true
+    resize_box: true
+  - !RandomFlipImage
+    prob: 0.5
+  - !NormalizeImage
+    is_channel_first: false
+    is_scale: true
+    mean: [0.485,0.456,0.406]
+    std: [0.229, 0.224,0.225]
+  - !Permute
+    to_bgr: false
+    channel_first: true
+  batch_transforms:
+  - !PadBatch
+    pad_to_stride: 32
+  - !Gt2Solov2Target
+    num_grids: [40, 36, 24, 16, 12]
+    scale_ranges: [[1, 96], [48, 192], [96, 384], [192, 768], [384, 2048]]
+    coord_sigma: 0.2

configs/solov2/solov2_reader.yml

+TrainReader:
+  batch_size: 2
+  worker_num: 2
+  inputs_def:
+    fields: ['image', 'im_id', 'gt_segm']
+  dataset:
+    !COCODataSet
+    dataset_dir: dataset/coco
+    anno_path: annotations/instances_train2017.json
+    image_dir: train2017
+  sample_transforms:
+  - !DecodeImage
+    to_rgb: true
+  - !Poly2Mask {}
+  - !ResizeImage
+    target_size: 800
+    max_size: 1333
+    interp: 1
+    use_cv2: true
+    resize_box: true
+  - !RandomFlipImage
+    prob: 0.5
+  - !NormalizeImage
+    is_channel_first: false
+    is_scale: true
+    mean: [0.485,0.456,0.406]
+    std: [0.229, 0.224,0.225]
+  - !Permute
+    to_bgr: false
+    channel_first: true
+  batch_transforms:
+  - !PadBatch
+    pad_to_stride: 32
+  - !Gt2Solov2Target
+    num_grids: [40, 36, 24, 16, 12]
+    scale_ranges: [[1, 96], [48, 192], [96, 384], [192, 768], [384, 2048]]
+    coord_sigma: 0.2
+  shuffle: True
+
+EvalReader:
+  inputs_def:
+    fields: ['image', 'im_info', 'im_id']
+  dataset:
+    !COCODataSet
+    image_dir: val2017
+    anno_path: annotations/instances_val2017.json
+    dataset_dir: dataset/coco
+  sample_transforms:
+  - !DecodeImage
+    to_rgb: true
+  - !ResizeImage
+    interp: 1
+    max_size: 1333
+    target_size: 800
+    use_cv2: true
+  - !NormalizeImage
+    is_channel_first: false
+    is_scale: true
+    mean: [0.485,0.456,0.406]
+    std: [0.229, 0.224,0.225]
+  - !Permute
+    channel_first: true
+    to_bgr: false
+  batch_transforms:
+  - !PadBatch
+    pad_to_stride: 32
+    use_padded_im_info: false
+  # only support batch_size=1 when evaluation
+  batch_size: 1
+  shuffle: false
+  drop_last: false
+  drop_empty: false
+  worker_num: 2
+
+TestReader:
+  inputs_def:
+    fields: ['image', 'im_info', 'im_id', 'im_shape']
+  dataset:
+    !ImageFolder
+    anno_path: dataset/coco/annotations/instances_val2017.json
+  sample_transforms:
+  - !DecodeImage
+    to_rgb: true
+  - !ResizeImage
+    interp: 1
+    max_size: 1333
+    target_size: 800
+    use_cv2: true
+  - !NormalizeImage
+    is_channel_first: false
+    is_scale: true
+    mean: [0.485,0.456,0.406]
+    std: [0.229, 0.224,0.225]
+  - !Permute
+    channel_first: true
+    to_bgr: false
+  batch_transforms:
+  - !PadBatch
+    pad_to_stride: 32
+    use_padded_im_info: false

deploy/python/preprocess.py

+# Copyright (c) 2020 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 PIL import Image
+import cv2
+import numpy as np
+
+# Global dictionary
+RESIZE_SCALE_SET = {
+    'RCNN',
+    'RetinaNet',
+    'FCOS',
+    'SOLOv2',
+}
+
+
+def decode_image(im_file, im_info):
+    """read rgb image
+    Args:
+        im_file (str/np.ndarray): path of image/ np.ndarray read by cv2
+        im_info (dict): info of image
+    Returns:
+        im (np.ndarray):  processed image (np.ndarray)
+        im_info (dict): info of processed image
+    """
+    if isinstance(im_file, str):
+        with open(im_file, 'rb') as f:
+            im_read = f.read()
+        data = np.frombuffer(im_read, dtype='uint8')
+        im = cv2.imdecode(data, 1)  # BGR mode, but need RGB mode
+        im = cv2.cvtColor(im, cv2.COLOR_BGR2RGB)
+        im_info['origin_shape'] = im.shape[:2]
+        im_info['resize_shape'] = im.shape[:2]
+    else:
+        im = im_file
+        im_info['origin_shape'] = im.shape[:2]
+        im_info['resize_shape'] = im.shape[:2]
+    return im, im_info
+
+
+class Resize(object):
+    """resize image by target_size and max_size
+    Args:
+        arch (str): model type
+        target_size (int): the target size of image
+        max_size (int): the max size of image
+        use_cv2 (bool): whether us cv2
+        image_shape (list): input shape of model
+        interp (int): method of resize
+    """
+
+    def __init__(self,
+                 arch,
+                 target_size,
+                 max_size,
+                 use_cv2=True,
+                 image_shape=None,
+                 interp=cv2.INTER_LINEAR,
+                 resize_box=False):
+        self.target_size = target_size
+        self.max_size = max_size
+        self.image_shape = image_shape
+        self.arch = arch
+        self.use_cv2 = use_cv2
+        self.interp = interp
+
+    def __call__(self, im, im_info):
+        """
+        Args:
+            im (np.ndarray): image (np.ndarray)
+            im_info (dict): info of image
+        Returns:
+            im (np.ndarray):  processed image (np.ndarray)
+            im_info (dict): info of processed image
+        """
+        im_channel = im.shape[2]
+        im_scale_x, im_scale_y = self.generate_scale(im)
+        if self.use_cv2:
+            im = cv2.resize(
+                im,
+                None,
+                None,
+                fx=im_scale_x,
+                fy=im_scale_y,
+                interpolation=self.interp)
+        else:
+            resize_w = int(im_scale_x * float(im.shape[1]))
+            resize_h = int(im_scale_y * float(im.shape[0]))
+            if self.max_size != 0:
+                raise TypeError(
+                    'If you set max_size to cap the maximum size of image,'
+                    'please set use_cv2 to True to resize the image.')
+            im = im.astype('uint8')
+            im = Image.fromarray(im)
+            im = im.resize((int(resize_w), int(resize_h)), self.interp)
+            im = np.array(im)
+
+        # padding im when image_shape fixed by infer_cfg.yml
+        if self.max_size != 0 and self.image_shape is not None:
+            padding_im = np.zeros(
+                (self.max_size, self.max_size, im_channel), dtype=np.float32)
+            im_h, im_w = im.shape[:2]
+            padding_im[:im_h, :im_w, :] = im
+            im = padding_im
+
+        im_info['scale'] = [im_scale_x, im_scale_y]
+        im_info['resize_shape'] = im.shape[:2]
+        return im, im_info
+
+    def generate_scale(self, im):
+        """
+        Args:
+            im (np.ndarray): image (np.ndarray)
+        Returns:
+            im_scale_x: the resize ratio of X
+            im_scale_y: the resize ratio of Y
+        """
+        origin_shape = im.shape[:2]
+        im_c = im.shape[2]
+        if self.max_size != 0 and self.arch in RESIZE_SCALE_SET:
+            im_size_min = np.min(origin_shape[0:2])
+            im_size_max = np.max(origin_shape[0:2])
+            im_scale = float(self.target_size) / float(im_size_min)
+            if np.round(im_scale * im_size_max) > self.max_size:
+                im_scale = float(self.max_size) / float(im_size_max)
+            im_scale_x = im_scale
+            im_scale_y = im_scale
+        else:
+            im_scale_x = float(self.target_size) / float(origin_shape[1])
+            im_scale_y = float(self.target_size) / float(origin_shape[0])
+        return im_scale_x, im_scale_y
+
+
+class Normalize(object):
+    """normalize image
+    Args:
+        mean (list): im - mean
+        std (list): im / std
+        is_scale (bool): whether need im / 255
+        is_channel_first (bool): if True: image shape is CHW, else: HWC
+    """
+
+    def __init__(self, mean, std, is_scale=True, is_channel_first=False):
+        self.mean = mean
+        self.std = std
+        self.is_scale = is_scale
+        self.is_channel_first = is_channel_first
+
+    def __call__(self, im, im_info):
+        """
+        Args:
+            im (np.ndarray): image (np.ndarray)
+            im_info (dict): info of image
+        Returns:
+            im (np.ndarray):  processed image (np.ndarray)
+            im_info (dict): info of processed image
+        """
+        im = im.astype(np.float32, copy=False)
+        if self.is_channel_first:
+            mean = np.array(self.mean)[:, np.newaxis, np.newaxis]
+            std = np.array(self.std)[:, np.newaxis, np.newaxis]
+        else:
+            mean = np.array(self.mean)[np.newaxis, np.newaxis, :]
+            std = np.array(self.std)[np.newaxis, np.newaxis, :]
+        if self.is_scale:
+            im = im / 255.0
+        im -= mean
+        im /= std
+        return im, im_info
+
+
+class Permute(object):
+    """permute image
+    Args:
+        to_bgr (bool): whether convert RGB to BGR 
+        channel_first (bool): whether convert HWC to CHW
+    """
+
+    def __init__(self, to_bgr=False, channel_first=True):
+        self.to_bgr = to_bgr
+        self.channel_first = channel_first
+
+    def __call__(self, im, im_info):
+        """
+        Args:
+            im (np.ndarray): image (np.ndarray)
+            im_info (dict): info of image
+        Returns:
+            im (np.ndarray):  processed image (np.ndarray)
+            im_info (dict): info of processed image
+        """
+        if self.channel_first:
+            im = im.transpose((2, 0, 1)).copy()
+        if self.to_bgr:
+            im = im[[2, 1, 0], :, :]
+        return im, im_info
+
+
+class PadStride(object):
+    """ padding image for model with FPN 
+    Args:
+        stride (bool): model with FPN need image shape % stride == 0 
+    """
+
+    def __init__(self, stride=0):
+        self.coarsest_stride = stride
+
+    def __call__(self, im, im_info):
+        """
+        Args:
+            im (np.ndarray): image (np.ndarray)
+            im_info (dict): info of image
+        Returns:
+            im (np.ndarray):  processed image (np.ndarray)
+            im_info (dict): info of processed image
+        """
+        coarsest_stride = self.coarsest_stride
+        if coarsest_stride == 0:
+            return im
+        im_c, im_h, im_w = im.shape
+        pad_h = int(np.ceil(float(im_h) / coarsest_stride) * coarsest_stride)
+        pad_w = int(np.ceil(float(im_w) / coarsest_stride) * coarsest_stride)
+        padding_im = np.zeros((im_c, pad_h, pad_w), dtype=np.float32)
+        padding_im[:, :im_h, :im_w] = im
+        im_info['pad_shape'] = padding_im.shape[1:]
+        return padding_im, im_info
+
+
+def preprocess(im, preprocess_ops):
+    # process image by preprocess_ops
+    im_info = {
+        'scale': [1., 1.],
+        'origin_shape': None,
+        'resize_shape': None,
+        'pad_shape': None,
+    }
+    im, im_info = decode_image(im, im_info)
+    for operator in preprocess_ops:
+        im, im_info = operator(im, im_info)
+    im = np.array((im, )).astype('float32')
+    return im, im_info

deploy/python/visualize.py

@@ -18,18 +18,20 @@ from __future__ import division
 import cv2
 import numpy as np
 from PIL import Image, ImageDraw
+from scipy import ndimage
 
 
-def visualize_box_mask(im, results, labels, mask_resolution=14):
+def visualize_box_mask(im, results, labels, mask_resolution=14, threshold=0.5):
     """
     Args:
         im (str/np.ndarray): path of image/np.ndarray read by cv2
-        results (dict): include 'boxes': np.ndarray: shape:[N,6], N: number of box，
+        results (dict): include 'boxes': np.ndarray: shape:[N,6], N: number of box,
                         matix element:[class, score, x_min, y_min, x_max, y_max]
                         MaskRCNN's results include 'masks': np.ndarray:
                         shape:[N, class_num, mask_resolution, mask_resolution]
         labels (list): labels:['class1', ..., 'classn']
         mask_resolution (int): shape of a mask is:[mask_resolution, mask_resolution]
+        threshold (float): Threshold of score.
     Returns:
         im (PIL.Image.Image): visualized image
     """
@@ -46,6 +48,14 @@ def visualize_box_mask(im, results, labels, mask_resolution=14):
             resolution=mask_resolution)
     if 'boxes' in results:
         im = draw_box(im, results['boxes'], labels)
+    if 'segm' in results:
+        im = draw_segm(
+            im,
+            results['segm'],
+            results['label'],
+            results['score'],
+            labels,
+            threshold=threshold)
     return im
 
 
@@ -73,7 +83,7 @@ def get_color_map_list(num_classes):
 def expand_boxes(boxes, scale=0.0):
     """
     Args:
-        boxes (np.ndarray): shape:[N,4], N:number of box，
+        boxes (np.ndarray): shape:[N,4], N:number of box,
                             matix element:[x_min, y_min, x_max, y_max]
         scale (float): scale of boxes
     Returns:
@@ -97,7 +107,7 @@ def draw_mask(im, np_boxes, np_masks, labels, resolution=14, threshold=0.5):
     """
     Args:
         im (PIL.Image.Image): PIL image
-        np_boxes (np.ndarray): shape:[N,6], N: number of box，
+        np_boxes (np.ndarray): shape:[N,6], N: number of box,
                                matix element:[class, score, x_min, y_min, x_max, y_max]
         np_masks (np.ndarray): shape:[N, class_num, resolution, resolution]
         labels (list): labels:['class1', ..., 'classn']
@@ -152,7 +162,7 @@ def draw_box(im, np_boxes, labels):
     """
     Args:
         im (PIL.Image.Image): PIL image
-        np_boxes (np.ndarray): shape:[N,6], N: number of box，
+        np_boxes (np.ndarray): shape:[N,6], N: number of box,
                                matix element:[class, score, x_min, y_min, x_max, y_max]
         labels (list): labels:['class1', ..., 'classn']
     Returns:
@@ -186,3 +196,41 @@ def draw_box(im, np_boxes, labels):
             [(xmin + 1, ymin - th), (xmin + tw + 1, ymin)], fill=color)
         draw.text((xmin + 1, ymin - th), text, fill=(255, 255, 255))
     return im
+
+
+def draw_segm(im,
+              np_segms,
+              np_label,
+              np_score,
+              labels,
+              threshold=0.5,
+              alpha=0.7):
+    """
+    Draw segmentation on image
+    """
+    mask_color_id = 0
+    w_ratio = .4
+    color_list = get_color_map_list(len(labels))
+    im = np.array(im).astype('float32')
+    clsid2color = {}
+    np_segms = np_segms.astype(np.uint8)
+    for i in range(np_segms.shape[0]):
+        mask, score, clsid = np_segms[i], np_score[i], np_label[i] + 1
+        if score < threshold:
+            continue
+
+        if clsid not in clsid2color:
+            clsid2color[clsid] = color_list[clsid]
+        color_mask = clsid2color[clsid]
+        for c in range(3):
+            color_mask[c] = color_mask[c] * (1 - w_ratio) + w_ratio * 255
+        idx = np.nonzero(mask)
+        color_mask = np.array(color_mask)
+        im[idx[0], idx[1], :] *= 1.0 - alpha
+        im[idx[0], idx[1], :] += alpha * color_mask
+        center_y, center_x = ndimage.measurements.center_of_mass(mask)
+        label_text = "{}".format(labels[clsid])
+        vis_pos = (max(int(center_x) - 10, 0), int(center_y))
+        cv2.putText(im, label_text, vis_pos, cv2.FONT_HERSHEY_COMPLEX, 0.3,
+                    (255, 255, 255))
+    return Image.fromarray(im.astype('uint8'))

ppdet/data/transform/batch_operators.py

@@ -24,6 +24,7 @@ except Exception:
 import logging
 import cv2
 import numpy as np
+from scipy import ndimage
 
 from .operators import register_op, BaseOperator
 from .op_helper import jaccard_overlap, gaussian2D
@@ -37,6 +38,7 @@ __all__ = [
     'Gt2YoloTarget',
     'Gt2FCOSTarget',
     'Gt2TTFTarget',
+    'Gt2Solov2Target',
 ]
 
 
@@ -88,6 +90,13 @@ class PadBatch(BaseOperator):
                     (1, max_shape[1], max_shape[2]), dtype=np.float32)
                 padding_sem[:, :im_h, :im_w] = semantic
                 data['semantic'] = padding_sem
+            if 'gt_segm' in data.keys() and data['gt_segm'] is not None:
+                gt_segm = data['gt_segm']
+                padding_segm = np.zeros(
+                    (gt_segm.shape[0], max_shape[1], max_shape[2]),
+                    dtype=np.uint8)
+                padding_segm[:, :im_h, :im_w] = gt_segm
+                data['gt_segm'] = padding_segm
 
         return samples
 
@@ -590,3 +599,154 @@ class Gt2TTFTarget(BaseOperator):
             heatmap[y - top:y + bottom, x - left:x + right] = np.maximum(
                 masked_heatmap, masked_gaussian)
         return heatmap
+
+
+@register_op
+class Gt2Solov2Target(BaseOperator):
+    """Assign mask target and labels in SOLOv2 network.
+    Args:
+        num_grids (list): The list of feature map grids size.
+        scale_ranges (list): The list of mask boundary range.
+        coord_sigma (float): The coefficient of coordinate area length.
+        sampling_ratio (float): The ratio of down sampling.
+    """
+
+    def __init__(self,
+                 num_grids=[40, 36, 24, 16, 12],
+                 scale_ranges=[[1, 96], [48, 192], [96, 384], [192, 768],
+                               [384, 2048]],
+                 coord_sigma=0.2,
+                 sampling_ratio=4.0):
+        super(Gt2Solov2Target, self).__init__()
+        self.num_grids = num_grids
+        self.scale_ranges = scale_ranges
+        self.coord_sigma = coord_sigma
+        self.sampling_ratio = sampling_ratio
+
+    def _scale_size(self, im, scale):
+        h, w = im.shape[:2]
+        new_size = (int(w * float(scale) + 0.5), int(h * float(scale) + 0.5))
+        resized_img = cv2.resize(
+            im, None, None, fx=scale, fy=scale, interpolation=cv2.INTER_LINEAR)
+        return resized_img
+
+    def __call__(self, samples, context=None):
+        sample_id = 0
+        for sample in samples:
+            gt_bboxes_raw = sample['gt_bbox']
+            gt_labels_raw = sample['gt_class']
+            im_c, im_h, im_w = sample['image'].shape[:]
+            gt_masks_raw = sample['gt_segm'].astype(np.uint8)
+            mask_feat_size = [
+                int(im_h / self.sampling_ratio), int(im_w / self.sampling_ratio)
+            ]
+            gt_areas = np.sqrt((gt_bboxes_raw[:, 2] - gt_bboxes_raw[:, 0]) *
+                               (gt_bboxes_raw[:, 3] - gt_bboxes_raw[:, 1]))
+            ins_ind_label_list = []
+            idx = 0
+            for (lower_bound, upper_bound), num_grid \
+                    in zip(self.scale_ranges, self.num_grids):
+
+                hit_indices = ((gt_areas >= lower_bound) &
+                               (gt_areas <= upper_bound)).nonzero()[0]
+                num_ins = len(hit_indices)
+
+                ins_label = []
+                grid_order = []
+                cate_label = np.zeros([num_grid, num_grid], dtype=np.int64)
+                ins_ind_label = np.zeros([num_grid**2], dtype=np.bool)
+
+                if num_ins == 0:
+                    ins_label = np.zeros(
+                        [1, mask_feat_size[0], mask_feat_size[1]],
+                        dtype=np.uint8)
+                    ins_ind_label_list.append(ins_ind_label)
+                    sample['cate_label{}'.format(idx)] = cate_label.flatten()
+                    sample['ins_label{}'.format(idx)] = ins_label
+                    sample['grid_order{}'.format(idx)] = np.asarray(
+                        [sample_id * num_grid * num_grid + 0])
+                    idx += 1
+                    continue
+                gt_bboxes = gt_bboxes_raw[hit_indices]
+                gt_labels = gt_labels_raw[hit_indices]
+                gt_masks = gt_masks_raw[hit_indices, ...]
+
+                half_ws = 0.5 * (
+                    gt_bboxes[:, 2] - gt_bboxes[:, 0]) * self.coord_sigma
+                half_hs = 0.5 * (
+                    gt_bboxes[:, 3] - gt_bboxes[:, 1]) * self.coord_sigma
+
+                for seg_mask, gt_label, half_h, half_w in zip(
+                        gt_masks, gt_labels, half_hs, half_ws):
+                    if seg_mask.sum() == 0:
+                        continue
+                    # mass center
+                    upsampled_size = (mask_feat_size[0] * 4,
+                                      mask_feat_size[1] * 4)
+                    center_h, center_w = ndimage.measurements.center_of_mass(
+                        seg_mask)
+                    coord_w = int(
+                        (center_w / upsampled_size[1]) // (1. / num_grid))
+                    coord_h = int(
+                        (center_h / upsampled_size[0]) // (1. / num_grid))
+
+                    # left, top, right, down
+                    top_box = max(0,
+                                  int(((center_h - half_h) / upsampled_size[0])
+                                      // (1. / num_grid)))
+                    down_box = min(num_grid - 1,
+                                   int(((center_h + half_h) / upsampled_size[0])
+                                       // (1. / num_grid)))
+                    left_box = max(0,
+                                   int(((center_w - half_w) / upsampled_size[1])
+                                       // (1. / num_grid)))
+                    right_box = min(num_grid - 1,
+                                    int(((center_w + half_w) /
+                                         upsampled_size[1]) // (1. / num_grid)))
+
+                    top = max(top_box, coord_h - 1)
+                    down = min(down_box, coord_h + 1)
+                    left = max(coord_w - 1, left_box)
+                    right = min(right_box, coord_w + 1)
+
+                    cate_label[top:(down + 1), left:(right + 1)] = gt_label
+                    seg_mask = self._scale_size(
+                        seg_mask, scale=1. / self.sampling_ratio)
+                    for i in range(top, down + 1):
+                        for j in range(left, right + 1):
+                            label = int(i * num_grid + j)
+                            cur_ins_label = np.zeros(
+                                [mask_feat_size[0], mask_feat_size[1]],
+                                dtype=np.uint8)
+                            cur_ins_label[:seg_mask.shape[0], :seg_mask.shape[
+                                1]] = seg_mask
+                            ins_label.append(cur_ins_label)
+                            ins_ind_label[label] = True
+                            grid_order.append(
+                                [sample_id * num_grid * num_grid + label])
+                if ins_label == []:
+                    ins_label = np.zeros(
+                        [1, mask_feat_size[0], mask_feat_size[1]],
+                        dtype=np.uint8)
+                    ins_ind_label_list.append(ins_ind_label)
+                    sample['cate_label{}'.format(idx)] = cate_label.flatten()
+                    sample['ins_label{}'.format(idx)] = ins_label
+                    sample['grid_order{}'.format(idx)] = np.asarray(
+                        [sample_id * num_grid * num_grid + 0])
+                else:
+                    ins_label = np.stack(ins_label, axis=0)
+                    ins_ind_label_list.append(ins_ind_label)
+                    sample['cate_label{}'.format(idx)] = cate_label.flatten()
+                    sample['ins_label{}'.format(idx)] = ins_label
+                    sample['grid_order{}'.format(idx)] = np.asarray(grid_order)
+                    assert len(grid_order) > 0
+                idx += 1
+            ins_ind_labels = np.concatenate([
+                ins_ind_labels_level_img
+                for ins_ind_labels_level_img in ins_ind_label_list
+            ])
+            fg_num = np.sum(ins_ind_labels)
+            sample['fg_num'] = fg_num
+            sample_id += 1
+
+        return samples

ppdet/data/transform/operators.py

@@ -272,7 +272,8 @@ class ResizeImage(BaseOperator):
                  target_size=0,
                  max_size=0,
                  interp=cv2.INTER_LINEAR,
-                 use_cv2=True):
+                 use_cv2=True,
+                 resize_box=False):
         """
         Rescale image to the specified target size, and capped at max_size
         if max_size != 0.
@@ -285,11 +286,13 @@ class ResizeImage(BaseOperator):
             interp (int): the interpolation method
             use_cv2 (bool): use the cv2 interpolation method or use PIL
                 interpolation method
+            resize_box (bool): whether resize ground truth bbox annotations.
         """
         super(ResizeImage, self).__init__()
         self.max_size = int(max_size)
         self.interp = int(interp)
         self.use_cv2 = use_cv2
+        self.resize_box = resize_box
         if not (isinstance(target_size, int) or isinstance(target_size, list)):
             raise TypeError(
                 "Type of target_size is invalid. Must be Integer or List, now is {}".
@@ -348,6 +351,23 @@ class ResizeImage(BaseOperator):
                 fx=im_scale_x,
                 fy=im_scale_y,
                 interpolation=self.interp)
+        else:
+            if self.max_size != 0:
+                raise TypeError(
+                    'If you set max_size to cap the maximum size of image,'
+                    'please set use_cv2 to True to resize the image.')
+            im = im.astype('uint8')
+            im = Image.fromarray(im)
+            im = im.resize((int(resize_w), int(resize_h)), self.interp)
+            im = np.array(im)
+        sample['image'] = im
+        sample['scale_factor'] = [im_scale_x, im_scale_y] * 2
+        if 'gt_bbox' in sample and self.resize_box and len(sample[
+                'gt_bbox']) > 0:
+            bboxes = sample['gt_bbox'] * sample['scale_factor']
+            bboxes[:, 0::2] = np.clip(bboxes[:, 0::2], 0, resize_w - 1)
+            bboxes[:, 1::2] = np.clip(bboxes[:, 1::2], 0, resize_h - 1)
+            sample['gt_bbox'] = bboxes
         if 'semantic' in sample.keys() and sample['semantic'] is not None:
             semantic = sample['semantic']
             semantic = cv2.resize(
@@ -360,16 +380,19 @@ class ResizeImage(BaseOperator):
             semantic = np.asarray(semantic).astype('int32')
             semantic = np.expand_dims(semantic, 0)
             sample['semantic'] = semantic
-        else:
-            if self.max_size != 0:
-                raise TypeError(
-                    'If you set max_size to cap the maximum size of image,'
-                    'please set use_cv2 to True to resize the image.')
-            im = im.astype('uint8')
-            im = Image.fromarray(im)
-            im = im.resize((int(resize_w), int(resize_h)), self.interp)
-            im = np.array(im)
-        sample['image'] = im
+        if 'gt_segm' in sample and len(sample['gt_segm']) > 0:
+            masks = [
+                cv2.resize(
+                    gt_segm,
+                    None,
+                    None,
+                    fx=im_scale_x,
+                    fy=im_scale_y,
+                    interpolation=cv2.INTER_NEAREST)
+                for gt_segm in sample['gt_segm']
+            ]
+            sample['gt_segm'] = np.asarray(masks).astype(np.uint8)
+
         return sample
 
 
@@ -473,7 +496,6 @@ class RandomFlipImage(BaseOperator):
                 if self.is_mask_flip and len(sample['gt_poly']) != 0:
                     sample['gt_poly'] = self.flip_segms(sample['gt_poly'],
                                                         height, width)
-
                 if 'gt_keypoint' in sample.keys():
                     sample['gt_keypoint'] = self.flip_keypoint(
                         sample['gt_keypoint'], width)
@@ -482,6 +504,9 @@ class RandomFlipImage(BaseOperator):
                         'semantic'] is not None:
                     sample['semantic'] = sample['semantic'][:, ::-1]
 
+                if 'gt_segm' in sample.keys() and sample['gt_segm'] is not None:
+                    sample['gt_segm'] = sample['gt_segm'][:, :, ::-1]
+
                 sample['flipped'] = True
                 sample['image'] = im
         sample = samples if batch_input else samples[0]
@@ -1953,6 +1978,12 @@ class RandomCrop(BaseOperator):
                         sample['gt_poly'] = valid_polys
                     else:
                         sample['gt_poly'] = crop_polys
+
+                if 'gt_segm' in sample:
+                    sample['gt_segm'] = self._crop_segm(sample['gt_segm'],
+                                                        crop_box)
+                    sample['gt_segm'] = np.take(
+                        sample['gt_segm'], valid_ids, axis=0)
                 sample['image'] = self._crop_image(sample['image'], crop_box)
                 sample['gt_bbox'] = np.take(cropped_box, valid_ids, axis=0)
                 sample['gt_class'] = np.take(
@@ -2000,6 +2031,10 @@ class RandomCrop(BaseOperator):
         x1, y1, x2, y2 = crop
         return img[y1:y2, x1:x2, :]
 
+    def _crop_segm(self, segm, crop):
+        x1, y1, x2, y2 = crop
+        return segm[:, y1:y2, x1:x2]
+
 
 @register_op
 class PadBox(BaseOperator):
@@ -2555,3 +2590,41 @@ class DebugVisibleImage(BaseOperator):
         save_path = os.path.join(self.output_dir, out_file_name)
         image.save(save_path, quality=95)
         return sample
+
+
+@register_op
+class Poly2Mask(BaseOperator):
+    """
+    gt poly to mask annotations
+    """
+
+    def __init__(self):
+        super(Poly2Mask, self).__init__()
+        import pycocotools.mask as maskUtils
+        self.maskutils = maskUtils
+
+    def _poly2mask(self, mask_ann, img_h, img_w):
+        if isinstance(mask_ann, list):
+            # polygon -- a single object might consist of multiple parts
+            # we merge all parts into one mask rle code
+            rles = self.maskutils.frPyObjects(mask_ann, img_h, img_w)
+            rle = self.maskutils.merge(rles)
+        elif isinstance(mask_ann['counts'], list):
+            # uncompressed RLE
+            rle = self.maskutils.frPyObjects(mask_ann, img_h, img_w)
+        else:
+            # rle
+            rle = mask_ann
+        mask = self.maskutils.decode(rle)
+        return mask
+
+    def __call__(self, sample, context=None):
+        assert 'gt_poly' in sample
+        im_h = sample['h']
+        im_w = sample['w']
+        masks = [
+            self._poly2mask(gt_poly, im_h, im_w)
+            for gt_poly in sample['gt_poly']
+        ]
+        sample['gt_segm'] = np.asarray(masks).astype(np.uint8)
+        return sample

ppdet/modeling/__init__.py

@@ -22,6 +22,7 @@ from . import roi_extractors
 from . import roi_heads
 from . import ops
 from . import target_assigners
+from . import mask_head
 
 from .anchor_heads import *
 from .architectures import *
@@ -30,3 +31,4 @@ from .roi_extractors import *
 from .roi_heads import *
 from .ops import *
 from .target_assigners import *
+from .mask_head import *

ppdet/modeling/anchor_heads/__init__.py

@@ -21,6 +21,7 @@ from . import fcos_head
 from . import corner_head
 from . import efficient_head
 from . import ttf_head
+from . import solov2_head
 
 from .rpn_head import *
 from .yolo_head import *
@@ -29,3 +30,4 @@ from .fcos_head import *
 from .corner_head import *
 from .efficient_head import *
 from .ttf_head import *
+from .solov2_head import *

ppdet/modeling/anchor_heads/solov2_head.py

+# Copyright (c) 2020 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 absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import paddle
+from paddle import fluid
+from paddle.fluid.param_attr import ParamAttr
+from paddle.fluid.regularizer import L2Decay
+
+from ppdet.modeling.ops import ConvNorm, DeformConvNorm, MaskMatrixNMS, DropBlock
+from ppdet.core.workspace import register
+
+from ppdet.utils.check import check_version
+
+from six.moves import zip
+import numpy as np
+
+__all__ = ['SOLOv2Head']
+
+
+@register
+class SOLOv2Head(object):
+    """
+    Head block for SOLOv2 network
+
+    Args:
+        num_classes (int): Number of output classes.
+        seg_feat_channels (int): Num_filters of kernel & categroy branch convolution operation.
+        stacked_convs (int): Times of convolution operation.
+        num_grids (list[int]): List of feature map grids size.
+        kernel_out_channels (int): Number of output channels in kernel branch.
+        dcn_v2_stages (list): Which stage use dcn v2 in tower.
+        segm_strides (list[int]): List of segmentation area stride.
+        solov2_loss (object): SOLOv2Loss instance.
+        score_threshold (float): Threshold of categroy score.
+        mask_nms (object): MaskMatrixNMS instance.
+        drop_block (bool): Whether use drop_block or not.
+    """
+    __inject__ = ['solov2_loss', 'mask_nms']
+    __shared__ = ['num_classes']
+
+    def __init__(self,
+                 num_classes=80,
+                 seg_feat_channels=256,
+                 stacked_convs=4,
+                 num_grids=[40, 36, 24, 16, 12],
+                 kernel_out_channels=256,
+                 dcn_v2_stages=[],
+                 segm_strides=[8, 8, 16, 32, 32],
+                 solov2_loss=None,
+                 score_threshold=0.1,
+                 mask_threshold=0.5,
+                 mask_nms=MaskMatrixNMS(
+                     update_threshold=0.05,
+                     pre_nms_top_n=500,
+                     post_nms_top_n=100,
+                     kernel='gaussian',
+                     sigma=2.0).__dict__,
+                 drop_block=False):
+        check_version('2.0.0')
+        self.num_classes = num_classes
+        self.seg_num_grids = num_grids
+        self.cate_out_channels = self.num_classes - 1
+        self.seg_feat_channels = seg_feat_channels
+        self.stacked_convs = stacked_convs
+        self.kernel_out_channels = kernel_out_channels
+        self.dcn_v2_stages = dcn_v2_stages
+        self.segm_strides = segm_strides
+        self.solov2_loss = solov2_loss
+        self.mask_nms = mask_nms
+        self.score_threshold = score_threshold
+        self.mask_threshold = mask_threshold
+        self.drop_block = drop_block
+        self.conv_type = [ConvNorm, DeformConvNorm]
+        if isinstance(mask_nms, dict):
+            self.mask_nms = MaskMatrixNMS(**mask_nms)
+
+    def _conv_pred(self, conv_feat, num_filters, is_test, name, name_feat=None):
+        for i in range(self.stacked_convs):
+            if i in self.dcn_v2_stages:
+                conv_func = self.conv_type[1]
+            else:
+                conv_func = self.conv_type[0]
+            conv_feat = conv_func(
+                input=conv_feat,
+                num_filters=self.seg_feat_channels,
+                filter_size=3,
+                stride=1,
+                norm_type='gn',
+                norm_groups=32,
+                freeze_norm=False,
+                act='relu',
+                initializer=fluid.initializer.NormalInitializer(scale=0.01),
+                norm_name='{}.{}.gn'.format(name, i),
+                name='{}.{}'.format(name, i))
+        if name_feat == 'bbox_head.solo_cate':
+            bias_init = float(-np.log((1 - 0.01) / 0.01))
+            bias_attr = ParamAttr(
+                name="{}.bias".format(name_feat),
+                initializer=fluid.initializer.Constant(value=bias_init))
+        else:
+            bias_attr = ParamAttr(name="{}.bias".format(name_feat))
+
+        if self.drop_block:
+            conv_feat = DropBlock(
+                conv_feat, block_size=3, keep_prob=0.9, is_test=is_test)
+
+        conv_feat = fluid.layers.conv2d(
+            input=conv_feat,
+            num_filters=num_filters,
+            filter_size=3,
+            stride=1,
+            padding=1,
+            param_attr=ParamAttr(
+                name="{}.weight".format(name_feat),
+                initializer=fluid.initializer.NormalInitializer(scale=0.01)),
+            bias_attr=bias_attr,
+            name=name + '_feat_')
+        return conv_feat
+
+    def _points_nms(self, heat, kernel=2):
+        hmax = fluid.layers.pool2d(
+            input=heat, pool_size=kernel, pool_type='max', pool_padding=1)
+        keep = fluid.layers.cast((hmax[:, :, :-1, :-1] == heat), 'float32')
+        return heat * keep
+
+    def _split_feats(self, feats):
+        return (paddle.nn.functional.interpolate(
+            feats[0],
+            scale_factor=0.5,
+            align_corners=False,
+            align_mode=0,
+            mode='bilinear'), feats[1], feats[2], feats[3],
+                paddle.nn.functional.interpolate(
+                    feats[4],
+                    size=fluid.layers.shape(feats[3])[-2:],
+                    mode='bilinear',
+                    align_corners=False,
+                    align_mode=0))
+
+    def get_outputs(self, input, is_eval=False):
+        """
+        Get SOLOv2 head output
+
+        Args:
+            input (list): List of Variables, output of backbone or neck stages
+            is_eval (bool): whether in train or test mode
+        Returns:
+            cate_pred_list (list): Variables of each category branch layer
+            kernel_pred_list (list): Variables of each kernel branch layer
+        """
+        feats = self._split_feats(input)
+        cate_pred_list = []
+        kernel_pred_list = []
+        for idx in range(len(self.seg_num_grids)):
+            cate_pred, kernel_pred = self._get_output_single(
+                feats[idx], idx, is_eval=is_eval)
+            cate_pred_list.append(cate_pred)
+            kernel_pred_list.append(kernel_pred)
+
+        return cate_pred_list, kernel_pred_list
+
+    def _get_output_single(self, input, idx, is_eval=False):
+        ins_kernel_feat = input
+        # CoordConv
+        x_range = paddle.linspace(
+            -1, 1, fluid.layers.shape(ins_kernel_feat)[-1], dtype='float32')
+        y_range = paddle.linspace(
+            -1, 1, fluid.layers.shape(ins_kernel_feat)[-2], dtype='float32')
+        y, x = paddle.tensor.meshgrid([y_range, x_range])
+        x = fluid.layers.unsqueeze(x, [0, 1])
+        y = fluid.layers.unsqueeze(y, [0, 1])
+        y = fluid.layers.expand(
+            y, expand_times=[fluid.layers.shape(ins_kernel_feat)[0], 1, 1, 1])
+        x = fluid.layers.expand(
+            x, expand_times=[fluid.layers.shape(ins_kernel_feat)[0], 1, 1, 1])
+        coord_feat = fluid.layers.concat([x, y], axis=1)
+        ins_kernel_feat = fluid.layers.concat(
+            [ins_kernel_feat, coord_feat], axis=1)
+
+        # kernel branch
+        kernel_feat = ins_kernel_feat
+        seg_num_grid = self.seg_num_grids[idx]
+        kernel_feat = paddle.nn.functional.interpolate(
+            kernel_feat,
+            size=[seg_num_grid, seg_num_grid],
+            mode='bilinear',
+            align_corners=False,
+            align_mode=0)
+        cate_feat = kernel_feat[:, :-2, :, :]
+
+        kernel_pred = self._conv_pred(
+            kernel_feat,
+            self.kernel_out_channels,
+            is_eval,
+            name='bbox_head.kernel_convs',
+            name_feat='bbox_head.solo_kernel')
+
+        # cate branch
+        cate_pred = self._conv_pred(
+            cate_feat,
+            self.cate_out_channels,
+            is_eval,
+            name='bbox_head.cate_convs',
+            name_feat='bbox_head.solo_cate')
+
+        if is_eval:
+            cate_pred = self._points_nms(
+                fluid.layers.sigmoid(cate_pred), kernel=2)
+            cate_pred = fluid.layers.transpose(cate_pred, [0, 2, 3, 1])
+        return cate_pred, kernel_pred
+
+    def get_loss(self, cate_preds, kernel_preds, ins_pred, ins_labels,
+                 cate_labels, grid_order_list, fg_num):
+        """
+        Get loss of network of SOLOv2.
+
+        Args:
+            cate_preds (list): Variable list of categroy branch output.
+            kernel_preds (list): Variable list of kernel branch output.
+            ins_pred (list): Variable list of instance branch output.
+            ins_labels (list): List of instance labels pre batch.
+            cate_labels (list): List of categroy labels pre batch.
+            grid_order_list (list): List of index in pre grid.
+            fg_num (int): Number of positive samples in a mini-batch.
+        Returns:
+            loss_ins (Variable): The instance loss Variable of SOLOv2 network.
+            loss_cate (Variable): The category loss Variable of SOLOv2 network.
+        """
+        new_kernel_preds = []
+        pad_length_list = []
+        for kernel_preds_level, grid_orders_level in zip(kernel_preds,
+                                                         grid_order_list):
+            reshape_pred = fluid.layers.reshape(
+                kernel_preds_level,
+                shape=(fluid.layers.shape(kernel_preds_level)[0],
+                       fluid.layers.shape(kernel_preds_level)[1], -1))
+            reshape_pred = fluid.layers.transpose(reshape_pred, [0, 2, 1])
+            reshape_pred = fluid.layers.reshape(
+                reshape_pred, shape=(-1, fluid.layers.shape(reshape_pred)[2]))
+            gathered_pred = fluid.layers.gather(
+                reshape_pred, index=grid_orders_level)
+            gathered_pred = fluid.layers.lod_reset(gathered_pred,
+                                                   grid_orders_level)
+            pad_value = fluid.layers.assign(input=np.array(
+                [0.0], dtype=np.float32))
+            pad_pred, pad_length = fluid.layers.sequence_pad(
+                gathered_pred, pad_value=pad_value)
+            new_kernel_preds.append(pad_pred)
+            pad_length_list.append(pad_length)
+
+        # generate masks
+        ins_pred_list = []
+        for kernel_pred, pad_length in zip(new_kernel_preds, pad_length_list):
+            cur_ins_pred = ins_pred
+            cur_ins_pred = fluid.layers.reshape(
+                cur_ins_pred,
+                shape=(fluid.layers.shape(cur_ins_pred)[0],
+                       fluid.layers.shape(cur_ins_pred)[1], -1))
+            ins_pred_conv = paddle.matmul(kernel_pred, cur_ins_pred)
+            cur_ins_pred = fluid.layers.reshape(
+                ins_pred_conv,
+                shape=(fluid.layers.shape(ins_pred_conv)[0],
+                       fluid.layers.shape(ins_pred_conv)[1],
+                       fluid.layers.shape(ins_pred)[-2],
+                       fluid.layers.shape(ins_pred)[-1]))
+            cur_ins_pred = fluid.layers.sequence_unpad(cur_ins_pred, pad_length)
+            ins_pred_list.append(cur_ins_pred)
+
+        num_ins = fluid.layers.reduce_sum(fg_num)
+        cate_preds = [
+            fluid.layers.reshape(
+                fluid.layers.transpose(cate_pred, [0, 2, 3, 1]),
+                shape=(-1, self.cate_out_channels)) for cate_pred in cate_preds
+        ]
+        flatten_cate_preds = fluid.layers.concat(cate_preds)
+        new_cate_labels = []
+        cate_labels = fluid.layers.concat(cate_labels)
+        cate_labels = fluid.layers.unsqueeze(cate_labels, 1)
+        loss_ins, loss_cate = self.solov2_loss(
+            ins_pred_list, ins_labels, flatten_cate_preds, cate_labels, num_ins)
+
+        return {'loss_ins': loss_ins, 'loss_cate': loss_cate}
+
+    def get_prediction(self, cate_preds, kernel_preds, seg_pred, im_info):
+        """
+        Get prediction result of SOLOv2 network
+
+        Args:
+            cate_preds (list): List of Variables, output of categroy branch.
+            kernel_preds (list): List of Variables, output of kernel branch.
+            seg_pred (list): List of Variables, output of mask head stages.
+            im_info(Variables): [h, w, scale] for input images.
+        Returns:
+            seg_masks (Variable): The prediction segmentation.
+            cate_labels (Variable): The prediction categroy label of each segmentation.
+            seg_masks (Variable): The prediction score of each segmentation.
+        """
+        num_levels = len(cate_preds)
+        featmap_size = fluid.layers.shape(seg_pred)[-2:]
+        seg_masks_list = []
+        cate_labels_list = []
+        cate_scores_list = []
+        cate_preds = [cate_pred * 1.0 for cate_pred in cate_preds]
+        kernel_preds = [kernel_pred * 1.0 for kernel_pred in kernel_preds]
+        # Currently only supports batch size == 1
+        for idx in range(1):
+            cate_pred_list = [
+                fluid.layers.reshape(
+                    cate_preds[i][idx], shape=(-1, self.cate_out_channels))
+                for i in range(num_levels)
+            ]
+            seg_pred_list = seg_pred
+            kernel_pred_list = [
+                fluid.layers.reshape(
+                    fluid.layers.transpose(kernel_preds[i][idx], [1, 2, 0]),
+                    shape=(-1, self.kernel_out_channels))
+                for i in range(num_levels)
+            ]
+            cate_pred_list = fluid.layers.concat(cate_pred_list, axis=0)
+            kernel_pred_list = fluid.layers.concat(kernel_pred_list, axis=0)
+
+            seg_masks, cate_labels, cate_scores = self.get_seg_single(
+                cate_pred_list, seg_pred_list, kernel_pred_list, featmap_size,
+                im_info[idx])
+        return {
+            "segm": seg_masks,
+            'cate_label': cate_labels,
+            'cate_score': cate_scores
+        }
+
+    def get_seg_single(self, cate_preds, seg_preds, kernel_preds, featmap_size,
+                       im_info):
+
+        im_scale = im_info[2]
+        h = fluid.layers.cast(im_info[0], 'int32')
+        w = fluid.layers.cast(im_info[1], 'int32')
+        upsampled_size_out = (featmap_size[0] * 4, featmap_size[1] * 4)
+
+        inds = fluid.layers.where(cate_preds > self.score_threshold)
+        cate_preds = fluid.layers.reshape(cate_preds, shape=[-1])
+        # Prevent empty and increase fake data
+        ind_a = fluid.layers.cast(fluid.layers.shape(kernel_preds)[0], 'int64')
+        ind_b = fluid.layers.zeros(shape=[1], dtype='int64')
+        inds_end = fluid.layers.unsqueeze(
+            fluid.layers.concat([ind_a, ind_b]), 0)
+        inds = fluid.layers.concat([inds, inds_end])
+        kernel_preds_end = fluid.layers.ones(
+            shape=[1, self.kernel_out_channels], dtype='float32')
+        kernel_preds = fluid.layers.concat([kernel_preds, kernel_preds_end])
+        cate_preds = fluid.layers.concat(
+            [cate_preds, fluid.layers.zeros(
+                shape=[1], dtype='float32')])
+
+        # cate_labels & kernel_preds
+        cate_labels = inds[:, 1]
+        kernel_preds = fluid.layers.gather(kernel_preds, index=inds[:, 0])
+        cate_score_idx = fluid.layers.elementwise_add(inds[:, 0] * 80,
+                                                      cate_labels)
+        cate_scores = fluid.layers.gather(cate_preds, index=cate_score_idx)
+
+        size_trans = np.power(self.seg_num_grids, 2)
+        strides = []
+        for _ind in range(len(self.segm_strides)):
+            strides.append(
+                fluid.layers.fill_constant(
+                    shape=[int(size_trans[_ind])],
+                    dtype="int32",
+                    value=self.segm_strides[_ind]))
+        strides = fluid.layers.concat(strides)
+        strides = fluid.layers.gather(strides, index=inds[:, 0])
+
+        # mask encoding.
+        kernel_preds = fluid.layers.unsqueeze(kernel_preds, [2, 3])
+        seg_preds = paddle.nn.functional.conv2d(seg_preds, kernel_preds)
+        seg_preds = fluid.layers.sigmoid(fluid.layers.squeeze(seg_preds, [0]))
+        seg_masks = seg_preds > self.mask_threshold
+        seg_masks = fluid.layers.cast(seg_masks, 'float32')
+        sum_masks = fluid.layers.reduce_sum(seg_masks, dim=[1, 2])
+
+        keep = fluid.layers.where(sum_masks > strides)
+        keep = fluid.layers.squeeze(keep, axes=[1])
+        # Prevent empty and increase fake data
+        keep_other = fluid.layers.concat([
+            keep, fluid.layers.cast(
+                fluid.layers.shape(sum_masks)[0] - 1, 'int64')
+        ])
+        keep_scores = fluid.layers.concat([
+            keep, fluid.layers.cast(fluid.layers.shape(sum_masks)[0], 'int64')
+        ])
+        cate_scores_end = fluid.layers.zeros(shape=[1], dtype='float32')
+        cate_scores = fluid.layers.concat([cate_scores, cate_scores_end])
+
+        seg_masks = fluid.layers.gather(seg_masks, index=keep_other)
+        seg_preds = fluid.layers.gather(seg_preds, index=keep_other)
+        sum_masks = fluid.layers.gather(sum_masks, index=keep_other)
+        cate_labels = fluid.layers.gather(cate_labels, index=keep_other)
+        cate_scores = fluid.layers.gather(cate_scores, index=keep_scores)
+
+        # mask scoring.
+        seg_mul = fluid.layers.cast(seg_preds * seg_masks, 'float32')
+        seg_scores = fluid.layers.reduce_sum(seg_mul, dim=[1, 2]) / sum_masks
+        cate_scores *= seg_scores
+
+        # Matrix NMS
+        seg_preds, cate_scores, cate_labels = self.mask_nms(
+            seg_preds, seg_masks, cate_labels, cate_scores, sum_masks=sum_masks)
+
+        ori_shape = im_info[:2] / im_scale + 0.5
+        ori_shape = fluid.layers.cast(ori_shape, 'int32')
+        seg_preds = paddle.nn.functional.interpolate(
+            fluid.layers.unsqueeze(seg_preds, 0),
+            size=upsampled_size_out,
+            mode='bilinear',
+            align_corners=False,
+            align_mode=0)[:, :, :h, :w]
+        seg_masks = fluid.layers.squeeze(
+            paddle.nn.functional.interpolate(
+                seg_preds,
+                size=ori_shape[:2],
+                mode='bilinear',
+                align_corners=False,
+                align_mode=0),
+            axes=[0])
+        # TODO: convert uint8
+        seg_masks = fluid.layers.cast(seg_masks > self.mask_threshold, 'int32')
+        return seg_masks, cate_labels, cate_scores

ppdet/modeling/architectures/__init__.py

@@ -29,6 +29,7 @@ from . import fcos
 from . import cornernet_squeeze
 from . import ttfnet
 from . import htc
+from . import solov2
 
 from .faster_rcnn import *
 from .mask_rcnn import *
@@ -45,3 +46,4 @@ from .fcos import *
 from .cornernet_squeeze import *
 from .ttfnet import *
 from .htc import *
+from .solov2 import *

ppdet/modeling/architectures/solov2.py

+# Copyright (c) 2020 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 absolute_import
+from __future__ import division
+from __future__ import print_function
+
+from collections import OrderedDict
+
+from paddle import fluid
+
+from ppdet.experimental import mixed_precision_global_state
+from ppdet.core.workspace import register
+
+__all__ = ['SOLOv2']
+
+
+@register
+class SOLOv2(object):
+    """
+    SOLOv2 network, see https://arxiv.org/abs/2003.10152
+
+    Args:
+        backbone (object): an backbone instance
+        fpn (object): feature pyramid network instance
+        bbox_head (object): an `SOLOv2Head` instance
+        mask_head (object): an `SOLOv2MaskHead` instance
+    """
+
+    __category__ = 'architecture'
+    __inject__ = ['backbone', 'fpn', 'bbox_head', 'mask_head']
+
+    def __init__(self,
+                 backbone,
+                 fpn=None,
+                 bbox_head='SOLOv2Head',
+                 mask_head='SOLOv2MaskHead'):
+        super(SOLOv2, self).__init__()
+        self.backbone = backbone
+        self.fpn = fpn
+        self.bbox_head = bbox_head
+        self.mask_head = mask_head
+
+    def build(self, feed_vars, mode='train'):
+        im = feed_vars['image']
+
+        mixed_precision_enabled = mixed_precision_global_state() is not None
+
+        # cast inputs to FP16
+        if mixed_precision_enabled:
+            im = fluid.layers.cast(im, 'float16')
+
+        body_feats = self.backbone(im)
+
+        if self.fpn is not None:
+            body_feats, spatial_scale = self.fpn.get_output(body_feats)
+
+        if isinstance(body_feats, OrderedDict):
+            body_feat_names = list(body_feats.keys())
+            body_feats = [body_feats[name] for name in body_feat_names]
+
+        # cast features back to FP32
+        if mixed_precision_enabled:
+            body_feats = [fluid.layers.cast(v, 'float32') for v in body_feats]
+
+        mask_feat_pred = self.mask_head.get_output(body_feats)
+
+        if mode == 'train':
+            ins_labels = []
+            cate_labels = []
+            grid_orders = []
+            fg_num = feed_vars['fg_num']
+
+            for i in range(self.num_level):
+                ins_label = 'ins_label{}'.format(i)
+                if ins_label in feed_vars:
+                    ins_labels.append(feed_vars[ins_label])
+                cate_label = 'cate_label{}'.format(i)
+                if cate_label in feed_vars:
+                    cate_labels.append(feed_vars[cate_label])
+                grid_order = 'grid_order{}'.format(i)
+                if grid_order in feed_vars:
+                    grid_orders.append(feed_vars[grid_order])
+
+            cate_preds, kernel_preds = self.bbox_head.get_outputs(body_feats)
+
+            losses = self.bbox_head.get_loss(cate_preds, kernel_preds,
+                                             mask_feat_pred, ins_labels,
+                                             cate_labels, grid_orders, fg_num)
+            total_loss = fluid.layers.sum(list(losses.values()))
+            losses.update({'loss': total_loss})
+            return losses
+        else:
+            im_info = feed_vars['im_info']
+            outs = self.bbox_head.get_outputs(body_feats, is_eval=True)
+            seg_inputs = outs + (mask_feat_pred, im_info)
+            return self.bbox_head.get_prediction(*seg_inputs)
+
+    def _inputs_def(self, image_shape, fields):
+        im_shape = [None] + image_shape
+        # yapf: disable
+        inputs_def = {
+            'image':    {'shape': im_shape,   'dtype': 'float32', 'lod_level': 0},
+            'im_info':  {'shape': [None, 3],  'dtype': 'float32', 'lod_level': 0},
+            'im_id':    {'shape': [None, 1],  'dtype': 'int64',   'lod_level': 0},
+            'im_shape': {'shape': [None, 3],  'dtype': 'float32', 'lod_level': 0},
+        }
+
+        if 'gt_segm' in fields:
+            for i in range(self.num_level):
+                targets_def = {
+                    'ins_label%d' % i:  {'shape': [None, None, None], 'dtype': 'int32', 'lod_level': 1},
+                    'cate_label%d' % i: {'shape': [None],       'dtype': 'int32', 'lod_level': 1},
+                    'grid_order%d' % i: {'shape': [None], 'dtype': 'int32', 'lod_level': 1},
+                }
+                inputs_def.update(targets_def)
+            targets_def = {
+                'fg_num': {'shape': [None], 'dtype': 'int32', 'lod_level': 0},
+            }
+            # yapf: enable
+            inputs_def.update(targets_def)
+        return inputs_def
+
+    def build_inputs(
+            self,
+            image_shape=[3, None, None],
+            fields=['image', 'im_id', 'gt_segm'],  # for train
+            num_level=5,
+            use_dataloader=True,
+            iterable=False):
+        self.num_level = num_level
+        inputs_def = self._inputs_def(image_shape, fields)
+        if 'gt_segm' in fields:
+            fields.remove('gt_segm')
+            fields.extend(['fg_num'])
+            for i in range(num_level):
+                fields.extend([
+                    'ins_label%d' % i, 'cate_label%d' % i, 'grid_order%d' % i
+                ])
+
+        feed_vars = OrderedDict([(key, fluid.data(
+            name=key,
+            shape=inputs_def[key]['shape'],
+            dtype=inputs_def[key]['dtype'],
+            lod_level=inputs_def[key]['lod_level'])) for key in fields])
+        loader = fluid.io.DataLoader.from_generator(
+            feed_list=list(feed_vars.values()),
+            capacity=16,
+            use_double_buffer=True,
+            iterable=iterable) if use_dataloader else None
+        return feed_vars, loader
+
+    def train(self, feed_vars):
+        return self.build(feed_vars, mode='train')
+
+    def eval(self, feed_vars):
+        return self.build(feed_vars, mode='test')
+
+    def test(self, feed_vars, exclude_nms=False):
+        assert not exclude_nms, "exclude_nms for {} is not support currently".format(
+            self.__class__.__name__)
+        return self.build(feed_vars, mode='test')

ppdet/modeling/losses/__init__.py

@@ -24,6 +24,7 @@ from . import fcos_loss
 from . import diou_loss_yolo
 from . import iou_aware_loss
 from . import ssd_with_lmk_loss
+from . import solov2_loss
 
 from .iou_aware_loss import *
 from .yolo_loss import *
@@ -35,3 +36,4 @@ from .balanced_l1_loss import *
 from .fcos_loss import *
 from .diou_loss_yolo import *
 from .ssd_with_lmk_loss import *
+from .solov2_loss import *

ppdet/modeling/losses/solov2_loss.py

+# Copyright (c) 2020 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 absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import paddle
+from paddle import fluid
+from ppdet.core.workspace import register, serializable
+
+__all__ = ['SOLOv2Loss']
+
+
+@register
+@serializable
+class SOLOv2Loss(object):
+    """
+    SOLOv2Loss
+    Args:
+        ins_loss_weight (float): Weight of instance loss.
+        focal_loss_gamma (float): Gamma parameter for focal loss.
+        focal_loss_alpha (float): Alpha parameter for focal loss.
+    """
+
+    def __init__(self,
+                 ins_loss_weight=3.0,
+                 focal_loss_gamma=2.0,
+                 focal_loss_alpha=0.25):
+        self.ins_loss_weight = ins_loss_weight
+        self.focal_loss_gamma = focal_loss_gamma
+        self.focal_loss_alpha = focal_loss_alpha
+
+    def _dice_loss(self, input, target):
+        input = fluid.layers.reshape(
+            input, shape=(fluid.layers.shape(input)[0], -1))
+        target = fluid.layers.reshape(
+            target, shape=(fluid.layers.shape(target)[0], -1))
+        target = fluid.layers.cast(target, 'float32')
+        a = fluid.layers.reduce_sum(input * target, dim=1)
+        b = fluid.layers.reduce_sum(input * input, dim=1) + 0.001
+        c = fluid.layers.reduce_sum(target * target, dim=1) + 0.001
+        d = (2 * a) / (b + c)
+        return 1 - d
+
+    def __call__(self, ins_pred_list, ins_label_list, cate_preds, cate_labels,
+                 num_ins):
+        """
+        Get loss of network of SOLOv2.
+        Args:
+            ins_pred_list (list): Variable list of instance branch output.
+            ins_label_list (list): List of instance labels pre batch.
+            cate_preds (list): Concat Variable list of categroy branch output.
+            cate_labels (list): Concat list of categroy labels pre batch.
+            num_ins (int): Number of positive samples in a mini-batch.
+        Returns:
+            loss_ins (Variable): The instance loss Variable of SOLOv2 network.
+            loss_cate (Variable): The category loss Variable of SOLOv2 network.
+        """
+
+        # Ues dice_loss to calculate instance loss
+        loss_ins = []
+        total_weights = fluid.layers.zeros(shape=[1], dtype='float32')
+        for input, target in zip(ins_pred_list, ins_label_list):
+            weights = fluid.layers.cast(
+                fluid.layers.reduce_sum(
+                    target, dim=[1, 2]) > 0, 'float32')
+            input = fluid.layers.sigmoid(input)
+            dice_out = fluid.layers.elementwise_mul(
+                self._dice_loss(input, target), weights)
+            total_weights += fluid.layers.reduce_sum(weights)
+            loss_ins.append(dice_out)
+        loss_ins = fluid.layers.reduce_sum(fluid.layers.concat(
+            loss_ins)) / total_weights
+        loss_ins = loss_ins * self.ins_loss_weight
+
+        # Ues sigmoid_focal_loss to calculate category loss
+        loss_cate = fluid.layers.sigmoid_focal_loss(
+            x=cate_preds,
+            label=cate_labels,
+            fg_num=num_ins + 1,
+            gamma=self.focal_loss_gamma,
+            alpha=self.focal_loss_alpha)
+        loss_cate = fluid.layers.reduce_sum(loss_cate)
+
+        return loss_ins, loss_cate

ppdet/modeling/mask_head/__init__.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.
+
+from __future__ import absolute_import
+
+from . import solo_mask_head
+
+from .solo_mask_head import *

ppdet/modeling/mask_head/solo_mask_head.py

+# Copyright (c) 2020 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 absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import paddle
+from paddle import fluid
+
+from ppdet.core.workspace import register
+from ppdet.modeling.ops import ConvNorm, DeformConvNorm
+
+__all__ = ['SOLOv2MaskHead']
+
+
+@register
+class SOLOv2MaskHead(object):
+    """
+    MaskHead of SOLOv2
+
+    Args:
+        in_channels (int): The channel number of input variable.
+        out_channels (int): The channel number of output variable.
+        start_level (int): The position where the input starts.
+        end_level (int): The position where the input ends.
+        use_dcn_in_tower: Whether to use dcn in tower or not.
+    """
+
+    def __init__(self,
+                 in_channels=128,
+                 out_channels=128,
+                 start_level=0,
+                 end_level=3,
+                 use_dcn_in_tower=False):
+        super(SOLOv2MaskHead, self).__init__()
+        assert start_level >= 0 and end_level >= start_level
+        self.out_channels = out_channels
+        self.start_level = start_level
+        self.end_level = end_level
+        self.in_channels = in_channels
+        self.use_dcn_in_tower = use_dcn_in_tower
+        self.conv_type = [ConvNorm, DeformConvNorm]
+
+    def _convs_levels(self, conv_feat, level, name=None):
+        conv_func = self.conv_type[0]
+        if self.use_dcn_in_tower:
+            conv_func = self.conv_type[1]
+
+        if level == 0:
+            return conv_func(
+                input=conv_feat,
+                num_filters=self.in_channels,
+                filter_size=3,
+                stride=1,
+                norm_type='gn',
+                norm_groups=32,
+                freeze_norm=False,
+                act='relu',
+                initializer=fluid.initializer.NormalInitializer(scale=0.01),
+                norm_name=name + '.conv' + str(level) + '.gn',
+                name=name + '.conv' + str(level))
+
+        for j in range(level):
+            conv_feat = conv_func(
+                input=conv_feat,
+                num_filters=self.in_channels,
+                filter_size=3,
+                stride=1,
+                norm_type='gn',
+                norm_groups=32,
+                freeze_norm=False,
+                act='relu',
+                initializer=fluid.initializer.NormalInitializer(scale=0.01),
+                norm_name=name + '.conv' + str(j) + '.gn',
+                name=name + '.conv' + str(j))
+            conv_feat = fluid.layers.resize_bilinear(
+                conv_feat,
+                scale=2,
+                name='upsample' + str(level) + str(j),
+                align_corners=False,
+                align_mode=0)
+        return conv_feat
+
+    def _conv_pred(self, conv_feat):
+        conv_func = self.conv_type[0]
+        if self.use_dcn_in_tower:
+            conv_func = self.conv_type[1]
+        conv_feat = conv_func(
+            input=conv_feat,
+            num_filters=self.out_channels,
+            filter_size=1,
+            stride=1,
+            norm_type='gn',
+            norm_groups=32,
+            freeze_norm=False,
+            act='relu',
+            initializer=fluid.initializer.NormalInitializer(scale=0.01),
+            norm_name='mask_feat_head.conv_pred.0.gn',
+            name='mask_feat_head.conv_pred.0')
+
+        return conv_feat
+
+    def get_output(self, inputs):
+        """
+        Get SOLOv2MaskHead output.
+
+        Args:
+            inputs(list[Variable]): feature map from each necks with shape of [N, C, H, W]
+        Returns:
+            ins_pred(Variable): Output of SOLOv2MaskHead head
+        """
+        range_level = self.end_level - self.start_level + 1
+        feature_add_all_level = self._convs_levels(
+            inputs[0], 0, name='mask_feat_head.convs_all_levels.0')
+        for i in range(1, range_level):
+            input_p = inputs[i]
+            if i == (range_level - 1):
+                input_feat = input_p
+                x_range = paddle.linspace(
+                    -1, 1, fluid.layers.shape(input_feat)[-1], dtype='float32')
+                y_range = paddle.linspace(
+                    -1, 1, fluid.layers.shape(input_feat)[-2], dtype='float32')
+                y, x = paddle.tensor.meshgrid([y_range, x_range])
+                x = fluid.layers.unsqueeze(x, [0, 1])
+                y = fluid.layers.unsqueeze(y, [0, 1])
+                y = fluid.layers.expand(
+                    y,
+                    expand_times=[fluid.layers.shape(input_feat)[0], 1, 1, 1])
+                x = fluid.layers.expand(
+                    x,
+                    expand_times=[fluid.layers.shape(input_feat)[0], 1, 1, 1])
+                coord_feat = fluid.layers.concat([x, y], axis=1)
+                input_p = fluid.layers.concat([input_p, coord_feat], axis=1)
+            feature_add_all_level = fluid.layers.elementwise_add(
+                feature_add_all_level,
+                self._convs_levels(
+                    input_p,
+                    i,
+                    name='mask_feat_head.convs_all_levels.{}'.format(i)))
+        ins_pred = self._conv_pred(feature_add_all_level)
+
+        return ins_pred

ppdet/modeling/ops.py

@@ -17,6 +17,7 @@ from numbers import Integral
 import math
 import six
 
+import paddle
 from paddle import fluid
 from paddle.fluid.layer_helper import LayerHelper
 from paddle.fluid.initializer import NumpyArrayInitializer
@@ -1263,27 +1264,27 @@ class LibraBBoxAssigner(object):
 
         rois = create_tmp_var(
             fluid.default_main_program(),
-            name=None,  #'rois', 
+            name=None,
             dtype='float32',
             shape=[-1, 4], )
         bbox_inside_weights = create_tmp_var(
             fluid.default_main_program(),
-            name=None,  #'bbox_inside_weights', 
+            name=None,
             dtype='float32',
             shape=[-1, 8 if self.is_cls_agnostic else self.class_nums * 4], )
         bbox_outside_weights = create_tmp_var(
             fluid.default_main_program(),
-            name=None,  #'bbox_outside_weights', 
+            name=None,
             dtype='float32',
             shape=[-1, 8 if self.is_cls_agnostic else self.class_nums * 4], )
         bbox_targets = create_tmp_var(
             fluid.default_main_program(),
-            name=None,  #'bbox_targets', 
+            name=None,
             dtype='float32',
             shape=[-1, 8 if self.is_cls_agnostic else self.class_nums * 4], )
         labels_int32 = create_tmp_var(
             fluid.default_main_program(),
-            name=None,  #'labels_int32', 
+            name=None,
             dtype='int32',
             shape=[-1, 1], )
 
@@ -1565,3 +1566,138 @@ class RetinaOutputDecoder(object):
         self.nms_top_k = pre_nms_top_n
         self.keep_top_k = detections_per_im
         self.nms_eta = nms_eta
+
+
+@register
+@serializable
+class MaskMatrixNMS(object):
+    """
+    Matrix NMS for multi-class masks.
+    Args:
+        update_threshold (float): Updated threshold of categroy score in second time.
+        pre_nms_top_n (int): Number of total instance to be kept per image before NMS
+        post_nms_top_n (int): Number of total instance to be kept per image after NMS.
+        kernel (str):  'linear' or 'gaussian'.
+        sigma (float): std in gaussian method.
+    Input:
+        seg_preds (Variable): shape (n, h, w), segmentation feature maps
+        seg_masks (Variable): shape (n, h, w), segmentation feature maps
+        cate_labels (Variable): shape (n), mask labels in descending order
+        cate_scores (Variable): shape (n), mask scores in descending order
+        sum_masks (Variable): a float tensor of the sum of seg_masks
+    Returns:
+        Variable: cate_scores, tensors of shape (n)
+    """
+
+    def __init__(self,
+                 update_threshold=0.05,
+                 pre_nms_top_n=500,
+                 post_nms_top_n=100,
+                 kernel='gaussian',
+                 sigma=2.0):
+        super(MaskMatrixNMS, self).__init__()
+        self.update_threshold = update_threshold
+        self.pre_nms_top_n = pre_nms_top_n
+        self.post_nms_top_n = post_nms_top_n
+        self.kernel = kernel
+        self.sigma = sigma
+
+    def _sort_score(self, scores, top_num):
+        self.case_scores = scores
+
+        def fn_1():
+            return fluid.layers.topk(self.case_scores, top_num)
+
+        def fn_2():
+            return fluid.layers.argsort(self.case_scores, descending=True)
+
+        sort_inds = fluid.layers.case(
+            pred_fn_pairs=[(fluid.layers.shape(scores)[0] > top_num, fn_1)],
+            default=fn_2)
+        return sort_inds
+
+    def __call__(self,
+                 seg_preds,
+                 seg_masks,
+                 cate_labels,
+                 cate_scores,
+                 sum_masks=None):
+        # sort and keep top nms_pre
+        sort_inds = self._sort_score(cate_scores, self.pre_nms_top_n)
+
+        seg_masks = fluid.layers.gather(seg_masks, index=sort_inds[1])
+        seg_preds = fluid.layers.gather(seg_preds, index=sort_inds[1])
+        sum_masks = fluid.layers.gather(sum_masks, index=sort_inds[1])
+        cate_scores = sort_inds[0]
+        cate_labels = fluid.layers.gather(cate_labels, index=sort_inds[1])
+
+        seg_masks = paddle.flatten(seg_masks, start_axis=1, stop_axis=-1)
+        # inter.
+        inter_matrix = paddle.mm(seg_masks,
+                                 fluid.layers.transpose(seg_masks, [1, 0]))
+        n_samples = fluid.layers.shape(cate_labels)
+        # union.
+        sum_masks_x = fluid.layers.reshape(
+            fluid.layers.expand(
+                sum_masks, expand_times=[n_samples]),
+            shape=[n_samples, n_samples])
+        # iou.
+        iou_matrix = (inter_matrix / (sum_masks_x + fluid.layers.transpose(
+            sum_masks_x, [1, 0]) - inter_matrix))
+        iou_matrix = paddle.triu(iou_matrix, diagonal=1)
+        # label_specific matrix.
+        cate_labels_x = fluid.layers.reshape(
+            fluid.layers.expand(
+                cate_labels, expand_times=[n_samples]),
+            shape=[n_samples, n_samples])
+        label_matrix = fluid.layers.cast(
+            (cate_labels_x == fluid.layers.transpose(cate_labels_x, [1, 0])),
+            'float32')
+        label_matrix = paddle.triu(label_matrix, diagonal=1)
+
+        # IoU compensation
+        compensate_iou = paddle.max((iou_matrix * label_matrix), axis=0)
+        compensate_iou = fluid.layers.reshape(
+            fluid.layers.expand(
+                compensate_iou, expand_times=[n_samples]),
+            shape=[n_samples, n_samples])
+        compensate_iou = fluid.layers.transpose(compensate_iou, [1, 0])
+
+        # IoU decay
+        decay_iou = iou_matrix * label_matrix
+
+        # matrix nms
+        if self.kernel == 'gaussian':
+            decay_matrix = fluid.layers.exp(-1 * self.sigma * (decay_iou**2))
+            compensate_matrix = fluid.layers.exp(-1 * self.sigma *
+                                                 (compensate_iou**2))
+            decay_coefficient = paddle.min(decay_matrix / compensate_matrix,
+                                           axis=0)
+        elif self.kernel == 'linear':
+            decay_matrix = (1 - decay_iou) / (1 - compensate_iou)
+            decay_coefficient = paddle.min(decay_matrix, axis=0)
+        else:
+            raise NotImplementedError
+
+        # update the score.
+        cate_scores = cate_scores * decay_coefficient
+
+        keep = fluid.layers.where(cate_scores >= self.update_threshold)
+        keep = fluid.layers.squeeze(keep, axes=[1])
+        # Prevent empty and increase fake data
+        keep = fluid.layers.concat([
+            keep, fluid.layers.cast(
+                fluid.layers.shape(cate_scores)[0] - 1, 'int64')
+        ])
+
+        seg_preds = fluid.layers.gather(seg_preds, index=keep)
+        cate_scores = fluid.layers.gather(cate_scores, index=keep)
+        cate_labels = fluid.layers.gather(cate_labels, index=keep)
+
+        # sort and keep top_k
+        sort_inds = self._sort_score(cate_scores, self.post_nms_top_n)
+
+        seg_preds = fluid.layers.gather(seg_preds, index=sort_inds[1])
+        cate_scores = sort_inds[0]
+        cate_labels = fluid.layers.gather(cate_labels, index=sort_inds[1])
+        return seg_preds, cate_scores, cate_labels

ppdet/utils/coco_eval.py

@@ -111,6 +111,10 @@ def mask_eval(results,
               resolution,
               thresh_binarize=0.5,
               save_only=False):
+    """
+    Format the output of mask and get mask ap by coco api evaluation.
+    It will be used in Mask-RCNN.
+    """
     assert 'mask' in results[0]
     assert outfile.endswith('.json')
     from pycocotools.coco import COCO
@@ -164,6 +168,52 @@ def mask_eval(results,
     cocoapi_eval(outfile, 'segm', coco_gt=coco_gt)
 
 
+def segm_eval(results, anno_file, outfile, save_only=False):
+    """
+    Format the output of segmentation, category_id and score in mask.josn, and
+    get mask ap by coco api evaluation. It will be used in instance segmentation
+    networks, such as: SOLOv2.
+    """
+    assert 'segm' in results[0]
+    assert outfile.endswith('.json')
+    from pycocotools.coco import COCO
+    coco_gt = COCO(anno_file)
+    clsid2catid = {i: v for i, v in enumerate(coco_gt.getCatIds())}
+    segm_results = []
+    for t in results:
+        im_id = int(t['im_id'][0][0])
+        segs = t['segm']
+        for mask in segs:
+            catid = int(clsid2catid[mask[0]])
+            masks = mask[1]
+            mask_score = masks[1]
+            segm = masks[0]
+            segm['counts'] = segm['counts'].decode('utf8')
+            coco_res = {
+                'image_id': im_id,
+                'category_id': catid,
+                'segmentation': segm,
+                'score': mask_score
+            }
+            segm_results.append(coco_res)
+
+    if len(segm_results) == 0:
+        logger.warning("The number of valid mask detected is zero.\n \
+            Please use reasonable model and check input data.")
+        return
+
+    with open(outfile, 'w') as f:
+        json.dump(segm_results, f)
+
+    if save_only:
+        logger.info('The mask result is saved to {} and do not '
+                    'evaluate the mAP.'.format(outfile))
+        return
+
+    map_stats = cocoapi_eval(outfile, 'segm', coco_gt=coco_gt)
+    return map_stats
+
+
 def cocoapi_eval(jsonfile,
                  style,
                  coco_gt=None,
@@ -374,6 +424,43 @@ def mask2out(results, clsid2catid, resolution, thresh_binarize=0.5):
     return segm_res
 
 
+def segm2out(results, clsid2catid, thresh_binarize=0.5):
+    import pycocotools.mask as mask_util
+    segm_res = []
+
+    # for each batch
+    for t in results:
+        segms = t['segm'][0]
+        clsid_labels = t['cate_label'][0]
+        clsid_scores = t['cate_score'][0]
+        lengths = segms.shape[0]
+        im_id = int(t['im_id'][0][0])
+        im_shape = t['im_shape'][0][0]
+        if lengths == 0 or segms is None:
+            continue
+        # for each sample
+        for i in range(lengths - 1):
+            im_h = int(im_shape[0])
+            im_w = int(im_shape[1])
+
+            clsid = int(clsid_labels[i])
+            catid = clsid2catid[clsid]
+            score = clsid_scores[i]
+            mask = segms[i]
+            segm = mask_util.encode(
+                np.array(
+                    mask[:, :, np.newaxis], order='F'))[0]
+            segm['counts'] = segm['counts'].decode('utf8')
+            coco_res = {
+                'image_id': im_id,
+                'category_id': catid,
+                'segmentation': segm,
+                'score': score
+            }
+            segm_res.append(coco_res)
+    return segm_res
+
+
 def expand_boxes(boxes, scale):
     """
     Expand an array of boxes by a given scale.

ppdet/utils/eval_utils.py

@@ -94,6 +94,25 @@ def clean_res(result, keep_name_list):
     return clean_result
 
 
+def get_masks(result):
+    import pycocotools.mask as mask_util
+    if result is None:
+        return {}
+    seg_pred = result['segm'][0].astype(np.uint8)
+    cate_label = result['cate_label'][0].astype(np.int)
+    cate_score = result['cate_score'][0].astype(np.float)
+    num_ins = seg_pred.shape[0]
+    masks = []
+    for idx in range(num_ins - 1):
+        cur_mask = seg_pred[idx, ...]
+        rle = mask_util.encode(
+            np.array(
+                cur_mask[:, :, np.newaxis], order='F'))[0]
+        rst = (rle, cate_score[idx])
+        masks.append([cate_label[idx], rst])
+    return masks
+
+
 def eval_run(exe,
              compile_program,
              loader,
@@ -163,11 +182,13 @@ def eval_run(exe,
                 corner_post_process(res, post_config, cfg.num_classes)
             if 'TTFNet' in cfg.architecture:
                 res['bbox'][1].append([len(res['bbox'][0])])
+            if 'segm' in res:
+                res['segm'] = get_masks(res)
             results.append(res)
             if iter_id % 100 == 0:
                 logger.info('Test iter {}'.format(iter_id))
             iter_id += 1
-            if len(res['bbox'][1]) == 0:
+            if 'bbox' not in res or len(res['bbox'][1]) == 0:
                 has_bbox = False
             images_num += len(res['bbox'][1][0]) if has_bbox else 1
     except (StopIteration, fluid.core.EOFException):
@@ -198,7 +219,7 @@ def eval_results(results,
     """Evaluation for evaluation program results"""
     box_ap_stats = []
     if metric == 'COCO':
-        from ppdet.utils.coco_eval import proposal_eval, bbox_eval, mask_eval
+        from ppdet.utils.coco_eval import proposal_eval, bbox_eval, mask_eval, segm_eval
         anno_file = dataset.get_anno()
         with_background = dataset.with_background
         if 'proposal' in results[0]:
@@ -225,6 +246,14 @@ def eval_results(results,
                 output = os.path.join(output_directory, 'mask.json')
             mask_eval(
                 results, anno_file, output, resolution, save_only=save_only)
+        if 'segm' in results[0]:
+            output = 'segm.json'
+            if output_directory:
+                output = os.path.join(output_directory, output)
+            mask_ap_stats = segm_eval(
+                results, anno_file, output, save_only=save_only)
+            if len(box_ap_stats) == 0:
+                box_ap_stats = mask_ap_stats
     else:
         if 'accum_map' in results[-1]:
             res = np.mean(results[-1]['accum_map'][0])

tools/eval.py

@@ -133,9 +133,6 @@ def main():
                                                 extra_keys)
         sub_eval_prog = sub_eval_prog.clone(True)
 
-    #if 'weights' in cfg:
-    #    checkpoint.load_params(exe, sub_eval_prog, cfg.weights)
-
     # load model
     exe.run(startup_prog)
     if 'weights' in cfg:
@@ -147,7 +144,6 @@ def main():
     results = eval_run(exe, compile_program, loader, keys, values, cls, cfg,
                        sub_eval_prog, sub_keys, sub_values, resolution)
 
-    #print(cfg['EvalReader']['dataset'].__dict__)
     # evaluation
     # if map_type not set, use default 11point, only use in VOC eval
     map_type = cfg.map_type if 'map_type' in cfg else '11point'

tools/export_model.py

@@ -46,11 +46,13 @@ TRT_MIN_SUBGRAPH = {
     'Face': 3,
     'TTFNet': 3,
     'FCOS': 3,
+    'SOLOv2': 3,
 }
 RESIZE_SCALE_SET = {
     'RCNN',
     'RetinaNet',
     'FCOS',
+    'SOLOv2',
 }