update modnet_resnet50vd_matting (#2100)

* add requirements.txt

* add init

* update format

modules/image/matting/modnet_resnet50vd_matting/README.md

 # modnet_resnet50vd_matting
 
 |模型名称|modnet_resnet50vd_matting|
-| :--- | :---: | 
+| :--- | :---: |
 |类别|图像-抠图|
 |网络|modnet_resnet50vd|
 |数据集|百度自建数据集|
@@ -17,8 +17,8 @@
 
   - 样例结果示例(左为原图，右为效果图)：
     <p align="center">
-    <img src="https://user-images.githubusercontent.com/35907364/144574288-28671577-8d5d-4b20-adb9-fe737015c841.jpg" width = "337" height = "505" hspace='10'/> 
-    <img src="https://user-images.githubusercontent.com/35907364/144779164-47146d3a-58c9-4a38-b968-3530aa9a0137.png" width = "337" height = "505" hspace='10'/> 
+    <img src="https://user-images.githubusercontent.com/35907364/144574288-28671577-8d5d-4b20-adb9-fe737015c841.jpg" width = "337" height = "505" hspace='10'/>
+    <img src="https://user-images.githubusercontent.com/35907364/144779164-47146d3a-58c9-4a38-b968-3530aa9a0137.png" width = "337" height = "505" hspace='10'/>
     </p>
 
 - ### 模型介绍
@@ -26,9 +26,9 @@
   - Matting（精细化分割/影像去背/抠图）是指借由计算前景的颜色和透明度，将前景从影像中撷取出来的技术，可用于替换背景、影像合成、视觉特效，在电影工业中被广泛地使用。影像中的每个像素会有代表其前景透明度的值，称作阿法值（Alpha），一张影像中所有阿法值的集合称作阿法遮罩（Alpha Matte），将影像被遮罩所涵盖的部分取出即可完成前景的分离。modnet_resnet50vd_matting可生成抠图结果。
 
 
-  
+
   - 更多详情请参考：[modnet_resnet50vd_matting](https://github.com/PaddlePaddle/PaddleSeg/tree/release/2.3/contrib/Matting)
-  
+
 
 ## 二、安装
 
@@ -46,11 +46,11 @@
     - ```shell
       $ hub install modnet_resnet50vd_matting
       ```
-      
+
     - 如您安装时遇到问题，可参考：[零基础windows安装](../../../../docs/docs_ch/get_start/windows_quickstart.md)
       | [零基础Linux安装](../../../../docs/docs_ch/get_start/linux_quickstart.md) | [零基础MacOS安装](../../../../docs/docs_ch/get_start/mac_quickstart.md)
 
-    
+
 ## 三、模型API预测
 
 - ### 1、命令行预测
@@ -58,9 +58,9 @@
   - ```shell
     $ hub run modnet_resnet50vd_matting --input_path "/PATH/TO/IMAGE"
     ```
-    
+
   - 通过命令行方式实现hub模型的调用，更多请见 [PaddleHub命令行指令](../../../../docs/docs_ch/tutorial/cmd_usage.rst)
-  
+
 
 - ### 2、预测代码示例
 
@@ -73,14 +73,14 @@
       result = model.predict(["/PATH/TO/IMAGE"])
       print(result)
       ```
-  
+
 - ### 3、API
 
     - ```python
-        def predict(self, 
-                    image_list, 
-                    trimap_list, 
-                    visualization, 
+        def predict(self,
+                    image_list,
+                    trimap_list,
+                    visualization,
                     save_path):
       ```
 
@@ -97,7 +97,7 @@
 
             - result (list(numpy.ndarray))：模型分割结果：
 
- 
+
 ## 四、服务部署
 
 - PaddleHub Serving可以部署人像matting在线服务。

modules/image/matting/modnet_resnet50vd_matting/README_en.md

 # modnet_resnet50vd_matting
 
 |Module Name|modnet_resnet50vd_matting|
-| :--- | :---: | 
+| :--- | :---: |
 |Category|Image Matting|
 |Network|modnet_resnet50vd|
 |Dataset|Baidu self-built dataset|
@@ -17,8 +17,8 @@
 
   - Sample results:
     <p align="center">
-    <img src="https://user-images.githubusercontent.com/35907364/144574288-28671577-8d5d-4b20-adb9-fe737015c841.jpg" width = "337" height = "505" hspace='10'/> 
-    <img src="https://user-images.githubusercontent.com/35907364/144779164-47146d3a-58c9-4a38-b968-3530aa9a0137.png" width = "337" height = "505" hspace='10'/> 
+    <img src="https://user-images.githubusercontent.com/35907364/144574288-28671577-8d5d-4b20-adb9-fe737015c841.jpg" width = "337" height = "505" hspace='10'/>
+    <img src="https://user-images.githubusercontent.com/35907364/144779164-47146d3a-58c9-4a38-b968-3530aa9a0137.png" width = "337" height = "505" hspace='10'/>
     </p>
 
 - ### Module Introduction
@@ -26,9 +26,9 @@
   - Mating is the technique of extracting foreground from an image by calculating its color and transparency. It is widely used in the film industry to replace background, image composition, and visual effects. Each pixel in the image will have a value that represents its foreground transparency, called Alpha. The set of all Alpha values in an image is called Alpha Matte. The part of the image covered by the mask can be extracted to complete foreground separation.
 
 
-  
+
   - For more information, please refer to: [modnet_resnet50vd_matting](https://github.com/PaddlePaddle/PaddleSeg/tree/release/2.3/contrib/Matting)
-  
+
 
 ## II. Installation
 
@@ -46,11 +46,11 @@
     - ```shell
       $ hub install modnet_resnet50vd_matting
       ```
-      
+
     - In case of any problems during installation, please refer to:[Windows_Quickstart](../../../../docs/docs_en/get_start/windows_quickstart.md)
     | [Linux_Quickstart](../../../../docs/docs_en/get_start/linux_quickstart.md) | [Mac_Quickstart](../../../../docs/docs_en/get_start/mac_quickstart.md)  
 
-    
+
 ## III. Module API Prediction
 
 - ### 1、Command line Prediction
@@ -58,7 +58,7 @@
   - ```shell
     $ hub run modnet_resnet50vd_matting --input_path "/PATH/TO/IMAGE"
     ```
-    
+
   - If you want to call the Hub module through the command line, please refer to: [PaddleHub Command Line Instruction](../../../../docs/docs_en/tutorial/cmd_usage.rst)
 
 
@@ -76,10 +76,10 @@
 - ### 3、API
 
     - ```python
-        def predict(self, 
-                    image_list, 
-                    trimap_list, 
-                    visualization, 
+        def predict(self,
+                    image_list,
+                    trimap_list,
+                    visualization,
                     save_path):
       ```
 
@@ -96,7 +96,7 @@
 
             - result (list(numpy.ndarray))：The list of model results.
 
- 
+
 ## IV. Server Deployment
 
 - PaddleHub Serving can deploy an online service of matting.

modules/image/matting/modnet_resnet50vd_matting/processor.py

@@ -11,17 +11,17 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
-import random
 import base64
-from typing import Callable, Union, List, Tuple
+from typing import Callable
+from typing import List
+from typing import Tuple
+from typing import Union
 
 import cv2
 import numpy as np
 import paddle
 import paddle.nn.functional as F
 from paddleseg.transforms import functional
-from PIL import Image
 
 
 class Compose:
@@ -61,6 +61,7 @@ class LoadImages:
     Args:
         to_rgb (bool, optional): If converting image to RGB color space. Default: True.
     """
+
     def __init__(self, to_rgb: bool = True):
         self.to_rgb = to_rgb
 
@@ -95,7 +96,7 @@ class ResizeByShort:
         short_size (int): The target size of short side.
     """
 
-    def __init__(self, short_size: int =512):
+    def __init__(self, short_size: int = 512):
         self.short_size = short_size
 
     def __call__(self, data: dict) -> dict:
@@ -140,14 +141,13 @@ class Normalize:
         ValueError: When mean/std is not list or any value in std is 0.
     """
 
-    def __init__(self, mean: Union[List[float], Tuple[float]] = (0.5, 0.5, 0.5), std: Union[List[float], Tuple[float]] = (0.5, 0.5, 0.5)):
+    def __init__(self,
+                 mean: Union[List[float], Tuple[float]] = (0.5, 0.5, 0.5),
+                 std: Union[List[float], Tuple[float]] = (0.5, 0.5, 0.5)):
         self.mean = mean
         self.std = std
-        if not (isinstance(self.mean, (list, tuple))
-                and isinstance(self.std, (list, tuple))):
-            raise ValueError(
-                "{}: input type is invalid. It should be list or tuple".format(
-                    self))
+        if not (isinstance(self.mean, (list, tuple)) and isinstance(self.std, (list, tuple))):
+            raise ValueError("{}: input type is invalid. It should be list or tuple".format(self))
         from functools import reduce
         if reduce(lambda x, y: x * y, self.std) == 0:
             raise ValueError('{}: std is invalid!'.format(self))
@@ -177,6 +177,7 @@ def reverse_transform(alpha: paddle.Tensor, trans_info: List[str]):
             raise Exception("Unexpected info '{}' in im_info".format(item[0]))
     return alpha
 
+
 def save_alpha_pred(alpha: np.ndarray, trimap: np.ndarray = None):
     """
     The value of alpha is range [0, 1], shape should be [h,w]
@@ -204,4 +205,4 @@ def base64_to_cv2(b64str: str):
     data = base64.b64decode(b64str.encode('utf8'))
     data = np.fromstring(data, np.uint8)
     data = cv2.imdecode(data, cv2.IMREAD_COLOR)
-    return data
+    return data
\ No newline at end of file

modules/image/matting/modnet_resnet50vd_matting/requirements.txt

+paddleseg>=2.3.0

modules/image/matting/modnet_resnet50vd_matting/resnet.py

@@ -11,45 +11,40 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 import paddle
 import paddle.nn as nn
 import paddle.nn.functional as F
-
 from paddleseg.models import layers
-from paddleseg.utils import utils
 
 __all__ = ["ResNet50_vd"]
 
 
 class ConvBNLayer(nn.Layer):
     """Basic conv bn relu layer."""
-    
+
     def __init__(
-            self,
-            in_channels: int,
-            out_channels: int,
-            kernel_size: int,
-            stride: int = 1,
-            dilation: int = 1,
-            groups: int = 1,
-            is_vd_mode: bool = False,
-            act: str = None,
+        self,
+        in_channels: int,
+        out_channels: int,
+        kernel_size: int,
+        stride: int = 1,
+        dilation: int = 1,
+        groups: int = 1,
+        is_vd_mode: bool = False,
+        act: str = None,
     ):
         super(ConvBNLayer, self).__init__()
 
         self.is_vd_mode = is_vd_mode
-        self._pool2d_avg = nn.AvgPool2D(
-            kernel_size=2, stride=2, padding=0, ceil_mode=True)
-        self._conv = nn.Conv2D(
-            in_channels=in_channels,
-            out_channels=out_channels,
-            kernel_size=kernel_size,
-            stride=stride,
-            padding=(kernel_size - 1) // 2 if dilation == 1 else 0,
-            dilation=dilation,
-            groups=groups,
-            bias_attr=False)
+        self._pool2d_avg = nn.AvgPool2D(kernel_size=2, stride=2, padding=0, ceil_mode=True)
+        self._conv = nn.Conv2D(in_channels=in_channels,
+                               out_channels=out_channels,
+                               kernel_size=kernel_size,
+                               stride=stride,
+                               padding=(kernel_size - 1) // 2 if dilation == 1 else 0,
+                               dilation=dilation,
+                               groups=groups,
+                               bias_attr=False)
 
         self._batch_norm = layers.SyncBatchNorm(out_channels)
         self._act_op = layers.Activation(act=act)
@@ -66,7 +61,7 @@ class ConvBNLayer(nn.Layer):
 
 class BottleneckBlock(nn.Layer):
     """Residual bottleneck block"""
-    
+
     def __init__(self,
                  in_channels: int,
                  out_channels: int,
@@ -76,34 +71,24 @@ class BottleneckBlock(nn.Layer):
                  dilation: int = 1):
         super(BottleneckBlock, self).__init__()
 
-        self.conv0 = ConvBNLayer(
-            in_channels=in_channels,
-            out_channels=out_channels,
-            kernel_size=1,
-            act='relu')
+        self.conv0 = ConvBNLayer(in_channels=in_channels, out_channels=out_channels, kernel_size=1, act='relu')
 
         self.dilation = dilation
 
-        self.conv1 = ConvBNLayer(
-            in_channels=out_channels,
-            out_channels=out_channels,
-            kernel_size=3,
-            stride=stride,
-            act='relu',
-            dilation=dilation)
-        self.conv2 = ConvBNLayer(
-            in_channels=out_channels,
-            out_channels=out_channels * 4,
-            kernel_size=1,
-            act=None)
+        self.conv1 = ConvBNLayer(in_channels=out_channels,
+                                 out_channels=out_channels,
+                                 kernel_size=3,
+                                 stride=stride,
+                                 act='relu',
+                                 dilation=dilation)
+        self.conv2 = ConvBNLayer(in_channels=out_channels, out_channels=out_channels * 4, kernel_size=1, act=None)
 
         if not shortcut:
-            self.short = ConvBNLayer(
-                in_channels=in_channels,
-                out_channels=out_channels * 4,
-                kernel_size=1,
-                stride=1,
-                is_vd_mode=False if if_first or stride == 1 else True)
+            self.short = ConvBNLayer(in_channels=in_channels,
+                                     out_channels=out_channels * 4,
+                                     kernel_size=1,
+                                     stride=1,
+                                     is_vd_mode=False if if_first or stride == 1 else True)
 
         self.shortcut = shortcut
 
@@ -133,33 +118,23 @@ class BottleneckBlock(nn.Layer):
 
 class BasicBlock(nn.Layer):
     """Basic residual block"""
-    def __init__(self,
-                 in_channels: int,
-                 out_channels: int,
-                 stride: int,
-                 shortcut: bool = True,
-                 if_first: bool = False):
+
+    def __init__(self, in_channels: int, out_channels: int, stride: int, shortcut: bool = True, if_first: bool = False):
         super(BasicBlock, self).__init__()
         self.stride = stride
-        self.conv0 = ConvBNLayer(
-            in_channels=in_channels,
-            out_channels=out_channels,
-            kernel_size=3,
-            stride=stride,
-            act='relu')
-        self.conv1 = ConvBNLayer(
-            in_channels=out_channels,
-            out_channels=out_channels,
-            kernel_size=3,
-            act=None)
+        self.conv0 = ConvBNLayer(in_channels=in_channels,
+                                 out_channels=out_channels,
+                                 kernel_size=3,
+                                 stride=stride,
+                                 act='relu')
+        self.conv1 = ConvBNLayer(in_channels=out_channels, out_channels=out_channels, kernel_size=3, act=None)
 
         if not shortcut:
-            self.short = ConvBNLayer(
-                in_channels=in_channels,
-                out_channels=out_channels,
-                kernel_size=1,
-                stride=1,
-                is_vd_mode=False if if_first else True)
+            self.short = ConvBNLayer(in_channels=in_channels,
+                                     out_channels=out_channels,
+                                     kernel_size=1,
+                                     stride=1,
+                                     is_vd_mode=False if if_first else True)
 
         self.shortcut = shortcut
 
@@ -212,13 +187,11 @@ class ResNet_vd(nn.Layer):
             depth = [3, 8, 36, 3]
         elif layers == 200:
             depth = [3, 12, 48, 3]
-        num_channels = [64, 256, 512, 1024
-                        ] if layers >= 50 else [64, 64, 128, 256]
+        num_channels = [64, 256, 512, 1024] if layers >= 50 else [64, 64, 128, 256]
         num_filters = [64, 128, 256, 512]
 
         # for channels of four returned stages
-        self.feat_channels = [c * 4 for c in num_filters
-                              ] if layers >= 50 else num_filters
+        self.feat_channels = [c * 4 for c in num_filters] if layers >= 50 else num_filters
         self.feat_channels = [64] + self.feat_channels
 
         dilation_dict = None
@@ -227,24 +200,9 @@ class ResNet_vd(nn.Layer):
         elif output_stride == 16:
             dilation_dict = {3: 2}
 
-        self.conv1_1 = ConvBNLayer(
-            in_channels=input_channels,
-            out_channels=32,
-            kernel_size=3,
-            stride=2,
-            act='relu')
-        self.conv1_2 = ConvBNLayer(
-            in_channels=32,
-            out_channels=32,
-            kernel_size=3,
-            stride=1,
-            act='relu')
-        self.conv1_3 = ConvBNLayer(
-            in_channels=32,
-            out_channels=64,
-            kernel_size=3,
-            stride=1,
-            act='relu')
+        self.conv1_1 = ConvBNLayer(in_channels=input_channels, out_channels=32, kernel_size=3, stride=2, act='relu')
+        self.conv1_2 = ConvBNLayer(in_channels=32, out_channels=32, kernel_size=3, stride=1, act='relu')
+        self.conv1_3 = ConvBNLayer(in_channels=32, out_channels=64, kernel_size=3, stride=1, act='relu')
         self.pool2d_max = nn.MaxPool2D(kernel_size=3, stride=2, padding=1)
 
         # self.block_list = []
@@ -264,8 +222,7 @@ class ResNet_vd(nn.Layer):
 
                     ###############################################################################
                     # Add dilation rate for some segmentation tasks, if dilation_dict is not None.
-                    dilation_rate = dilation_dict[
-                        block] if dilation_dict and block in dilation_dict else 1
+                    dilation_rate = dilation_dict[block] if dilation_dict and block in dilation_dict else 1
 
                     # Actually block here is 'stage', and i is 'block' in 'stage'
                     # At the stage 4, expand the the dilation_rate if given multi_grid
@@ -275,15 +232,12 @@ class ResNet_vd(nn.Layer):
 
                     bottleneck_block = self.add_sublayer(
                         'bb_%d_%d' % (block, i),
-                        BottleneckBlock(
-                            in_channels=num_channels[block]
-                            if i == 0 else num_filters[block] * 4,
-                            out_channels=num_filters[block],
-                            stride=2 if i == 0 and block != 0
-                            and dilation_rate == 1 else 1,
-                            shortcut=shortcut,
-                            if_first=block == i == 0,
-                            dilation=dilation_rate))
+                        BottleneckBlock(in_channels=num_channels[block] if i == 0 else num_filters[block] * 4,
+                                        out_channels=num_filters[block],
+                                        stride=2 if i == 0 and block != 0 and dilation_rate == 1 else 1,
+                                        shortcut=shortcut,
+                                        if_first=block == i == 0,
+                                        dilation=dilation_rate))
 
                     block_list.append(bottleneck_block)
                     shortcut = True
@@ -296,13 +250,11 @@ class ResNet_vd(nn.Layer):
                     conv_name = "res" + str(block + 2) + chr(97 + i)
                     basic_block = self.add_sublayer(
                         'bb_%d_%d' % (block, i),
-                        BasicBlock(
-                            in_channels=num_channels[block]
-                            if i == 0 else num_filters[block],
-                            out_channels=num_filters[block],
-                            stride=2 if i == 0 and block != 0 else 1,
-                            shortcut=shortcut,
-                            if_first=block == i == 0))
+                        BasicBlock(in_channels=num_channels[block] if i == 0 else num_filters[block],
+                                   out_channels=num_filters[block],
+                                   stride=2 if i == 0 and block != 0 else 1,
+                                   shortcut=shortcut,
+                                   if_first=block == i == 0))
                     block_list.append(basic_block)
                     shortcut = True
                 self.stage_list.append(block_list)