Merge pull request #361 from michaelowenliu/develop

dygraph/cvlibs/manager.py

@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import collections
+from collections.abc import Sequence
 import inspect
 
 
@@ -98,13 +98,14 @@ class ComponentManager:
         """
 
         # Check whether the type is a sequence
-        if isinstance(components, collections.Sequence):
+        if isinstance(components, Sequence):
             for component in components:
                 self._add_single_component(component)
         else:
             component = components
             self._add_single_component(component)
         
+        return components
 
 MODELS = ComponentManager()
 BACKBONES = ComponentManager()
\ No newline at end of file

dygraph/models/__init__.py

@@ -16,3 +16,4 @@ from .architectures import *
 from .unet import UNet
 from .deeplab import *
 from .fcn import *
+from .pspnet import *

dygraph/models/architectures/layer_utils.py

@@ -13,24 +13,22 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+import paddle.nn.functional as F
 from paddle import fluid
 from paddle.fluid import dygraph
 from paddle.fluid.dygraph import Conv2D
-from paddle.fluid.dygraph import SyncBatchNorm as BatchNorm
-import cv2
-import os
-import sys
+from paddle.nn import SyncBatchNorm as BatchNorm
+from paddle.nn.layer import activation
 
 
 class ConvBnRelu(dygraph.Layer):
-
     def __init__(self,
                  num_channels,
                  num_filters,
                  filter_size,
                  using_sep_conv=False,
                  **kwargs):
-        
+
         super(ConvBnRelu, self).__init__()
 
         if using_sep_conv:
@@ -41,16 +39,16 @@ class ConvBnRelu(dygraph.Layer):
         else:
 
             self.conv = Conv2D(num_channels,
-                                num_filters,
-                                filter_size,
-                                **kwargs)
+                               num_filters,
+                               filter_size,
+                               **kwargs)
 
         self.batch_norm = BatchNorm(num_filters)
 
     def forward(self, x):
         x = self.conv(x)
         x = self.batch_norm(x)
-        x = fluid.layers.relu(x)
+        x = F.relu(x)
         return x
 
 
@@ -81,7 +79,7 @@ class ConvReluPool(dygraph.Layer):
 
     def forward(self, x):
         x = self.conv(x)
-        x = fluid.layers.relu(x)
+        x = F.relu(x)
         x = fluid.layers.pool2d(x, pool_size=2, pool_type="max", pool_stride=2)
         return x
 
@@ -106,15 +104,15 @@ class DepthwiseConvBnRelu(dygraph.Layer):
                  **kwargs):
         super(DepthwiseConvBnRelu, self).__init__()
         self.depthwise_conv = ConvBn(num_channels,
-                                    num_filters=num_channels,
-                                    filter_size=filter_size,
-                                    groups=num_channels,
-                                    use_cudnn=False,
-                                    **kwargs)
+                                     num_filters=num_channels,
+                                     filter_size=filter_size,
+                                     groups=num_channels,
+                                     use_cudnn=False,
+                                     **kwargs)
         self.piontwise_conv = ConvBnRelu(num_channels,
-                                        num_filters,
-                                        filter_size=1,
-                                        groups=1)
+                                         num_filters,
+                                         filter_size=1,
+                                         groups=1)
 
     def forward(self, x):
         x = self.depthwise_conv(x)
@@ -122,20 +120,43 @@ class DepthwiseConvBnRelu(dygraph.Layer):
         return x
 
 
-def compute_loss(logits, label, ignore_index=255):
-    mask = label != ignore_index
-    mask = fluid.layers.cast(mask, 'float32')
-    loss, probs = fluid.layers.softmax_with_cross_entropy(
-        logits,
-        label,
-        ignore_index=ignore_index,
-        return_softmax=True,
-        axis=1)
+class Activation(fluid.dygraph.Layer):
+    """
+    The wrapper of activations
+    For example:
+        >>> relu = Activation("relu")
+        >>> print(relu)
+        <class 'paddle.nn.layer.activation.ReLU'>
+        >>> sigmoid = Activation("sigmoid")
+        >>> print(sigmoid)
+        <class 'paddle.nn.layer.activation.Sigmoid'>
+        >>> not_exit_one = Activation("not_exit_one")
+        KeyError: "not_exit_one does not exist in the current dict_keys(['elu', 'gelu', 'hardshrink', 
+        'tanh', 'hardtanh', 'prelu', 'relu', 'relu6', 'selu', 'leakyrelu', 'sigmoid', 'softmax', 
+        'softplus', 'softshrink', 'softsign', 'tanhshrink', 'logsigmoid', 'logsoftmax', 'hsigmoid'])"
+
+    Args:
+        act (str): the activation name in lowercase
+    """
+
+    def __init__(self, act=None):
+        super(Activation, self).__init__()
+
+        self._act = act
+        upper_act_names = activation.__all__
+        lower_act_names = [act.lower() for act in upper_act_names]
+        act_dict = dict(zip(lower_act_names, upper_act_names))
+
+        if act is not None:
+            if act in act_dict.keys():
+                act_name = act_dict[act]
+                self.act_func = eval("activation.{}()".format(act_name))
+            else:
+                raise KeyError("{} does not exist in the current {}".format(act, act_dict.keys()))
 
-    loss = loss * mask
-    avg_loss = fluid.layers.mean(loss) / (
-            fluid.layers.mean(mask) + 1e-5)
+    def forward(self, x):
 
-    label.stop_gradient = True
-    mask.stop_gradient = True
-    return avg_loss
\ No newline at end of file
+        if self._act is not None:
+            return self.act_func(x)
+        else:
+            return x
\ No newline at end of file

dygraph/models/architectures/mobilenetv3.py

@@ -16,15 +16,17 @@ from __future__ import absolute_import
 from __future__ import division
 from __future__ import print_function
 
+import math
 import numpy as np
+
 import paddle
 import paddle.fluid as fluid
 from paddle.fluid.param_attr import ParamAttr
 from paddle.fluid.layer_helper import LayerHelper
-from paddle.fluid.dygraph.nn import Conv2D, Pool2D, BatchNorm, Linear, Dropout
-
-import math
+from paddle.fluid.dygraph.nn import Conv2D, Pool2D, Linear, Dropout
+from paddle.nn import SyncBatchNorm as BatchNorm
 
+from dygraph.models.architectures import layer_utils
 from dygraph.cvlibs import manager
 
 __all__ = [
@@ -251,19 +253,18 @@ class ConvBNLayer(fluid.dygraph.Layer):
             bias_attr=False,
             use_cudnn=use_cudnn,
             act=None)
-        self.bn = fluid.dygraph.BatchNorm(
-            num_channels=out_c,
-            act=None,
-            param_attr=ParamAttr(
+        self.bn = BatchNorm(
+            num_features=out_c,
+            weight_attr=ParamAttr(
                 name=name + "_bn_scale",
                 regularizer=fluid.regularizer.L2DecayRegularizer(
                     regularization_coeff=0.0)),
             bias_attr=ParamAttr(
                 name=name + "_bn_offset",
                 regularizer=fluid.regularizer.L2DecayRegularizer(
-                    regularization_coeff=0.0)),
-            moving_mean_name=name + "_bn_mean",
-            moving_variance_name=name + "_bn_variance")
+                    regularization_coeff=0.0)))
+        
+        self._act_op = layer_utils.Activation(act=None)
 
     def forward(self, x):
         x = self.conv(x)

dygraph/models/architectures/resnet_vd.py

@@ -24,10 +24,11 @@ import paddle
 import paddle.fluid as fluid
 from paddle.fluid.param_attr import ParamAttr
 from paddle.fluid.layer_helper import LayerHelper
-from paddle.fluid.dygraph.nn import Conv2D, Pool2D, BatchNorm, Linear, Dropout
+from paddle.fluid.dygraph.nn import Conv2D, Pool2D, Linear, Dropout
+from paddle.nn import SyncBatchNorm as BatchNorm
 
 from dygraph.utils import utils
-
+from dygraph.models.architectures import layer_utils
 from dygraph.cvlibs import manager
 
 __all__ = [
@@ -69,17 +70,17 @@ class ConvBNLayer(fluid.dygraph.Layer):
             bn_name = "bn" + name[3:]
         self._batch_norm = BatchNorm(
             num_filters,
-            act=act,
-            param_attr=ParamAttr(name=bn_name + '_scale'),
-            bias_attr=ParamAttr(bn_name + '_offset'),
-            moving_mean_name=bn_name + '_mean',
-            moving_variance_name=bn_name + '_variance')
+            weight_attr=ParamAttr(name=bn_name + '_scale'),
+            bias_attr=ParamAttr(bn_name + '_offset'))
+        self._act_op = layer_utils.Activation(act=act)
 
     def forward(self, inputs):
         if self.is_vd_mode:
             inputs = self._pool2d_avg(inputs)
         y = self._conv(inputs)
         y = self._batch_norm(y)
+        y = self._act_op(y)
+
         return y
 
 

dygraph/models/architectures/xception_deeplab.py

@@ -2,8 +2,10 @@ import paddle
 import paddle.fluid as fluid
 from paddle.fluid.param_attr import ParamAttr
 from paddle.fluid.layer_helper import LayerHelper
-from paddle.fluid.dygraph.nn import Conv2D, Pool2D, BatchNorm, Linear, Dropout
+from paddle.fluid.dygraph.nn import Conv2D, Pool2D, Linear, Dropout
+from paddle.nn import SyncBatchNorm as BatchNorm
 
+from dygraph.models.architectures import layer_utils
 from dygraph.cvlibs import manager
 
 __all__ = ["Xception41_deeplab", "Xception65_deeplab", "Xception71_deeplab"]
@@ -79,17 +81,17 @@ class ConvBNLayer(fluid.dygraph.Layer):
             param_attr=ParamAttr(name=name + "/weights"),
             bias_attr=False)
         self._bn = BatchNorm(
-            num_channels=output_channels,
-            act=act,
+            num_features=output_channels,
             epsilon=1e-3,
             momentum=0.99,
-            param_attr=ParamAttr(name=name + "/BatchNorm/gamma"),
-            bias_attr=ParamAttr(name=name + "/BatchNorm/beta"),
-            moving_mean_name=name + "/BatchNorm/moving_mean",
-            moving_variance_name=name + "/BatchNorm/moving_variance")
+            weight_attr=ParamAttr(name=name + "/BatchNorm/gamma"),
+            bias_attr=ParamAttr(name=name + "/BatchNorm/beta"))
+        
+        self._act_op = layer_utils.Activation(act=act)
 
     def forward(self, inputs):
-        return self._bn(self._conv(inputs))
+        
+        return self._act_op(self._bn(self._conv(inputs)))
 
 
 class Seperate_Conv(fluid.dygraph.Layer):
@@ -115,13 +117,13 @@ class Seperate_Conv(fluid.dygraph.Layer):
             bias_attr=False)
         self._bn1 = BatchNorm(
             input_channels,
-            act=act,
             epsilon=1e-3,
             momentum=0.99,
-            param_attr=ParamAttr(name=name + "/depthwise/BatchNorm/gamma"),
-            bias_attr=ParamAttr(name=name + "/depthwise/BatchNorm/beta"),
-            moving_mean_name=name + "/depthwise/BatchNorm/moving_mean",
-            moving_variance_name=name + "/depthwise/BatchNorm/moving_variance")
+            weight_attr=ParamAttr(name=name + "/depthwise/BatchNorm/gamma"),
+            bias_attr=ParamAttr(name=name + "/depthwise/BatchNorm/beta"))
+        
+        self._act_op1 = layer_utils.Activation(act=act)
+
         self._conv2 = Conv2D(
             input_channels,
             output_channels,
@@ -133,19 +135,21 @@ class Seperate_Conv(fluid.dygraph.Layer):
             bias_attr=False)
         self._bn2 = BatchNorm(
             output_channels,
-            act=act,
             epsilon=1e-3,
             momentum=0.99,
-            param_attr=ParamAttr(name=name + "/pointwise/BatchNorm/gamma"),
-            bias_attr=ParamAttr(name=name + "/pointwise/BatchNorm/beta"),
-            moving_mean_name=name + "/pointwise/BatchNorm/moving_mean",
-            moving_variance_name=name + "/pointwise/BatchNorm/moving_variance")
+            weight_attr=ParamAttr(name=name + "/pointwise/BatchNorm/gamma"),
+            bias_attr=ParamAttr(name=name + "/pointwise/BatchNorm/beta"))
+        
+        self._act_op2 = layer_utils.Activation(act=act)
+        
 
     def forward(self, inputs):
         x = self._conv1(inputs)
         x = self._bn1(x)
+        x = self._act_op1(x)
         x = self._conv2(x)
         x = self._bn2(x)
+        x = self._act_op2(x)
         return x
 
 

dygraph/models/model_utils.py

+# -*- encoding: utf-8 -*-
+# 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.
+
+import paddle
+import paddle.nn.functional as F
+from paddle import fluid
+from paddle.fluid import dygraph
+from paddle.fluid.dygraph import Conv2D
+from paddle.nn import SyncBatchNorm as BatchNorm
+
+from dygraph.models.architectures import layer_utils
+
+
+class FCNHead(fluid.dygraph.Layer):
+    """
+    The FCNHead implementation used in auxilary layer
+
+    Args:
+        in_channels (int): the number of input channels
+        out_channels (int): the number of output channels
+    """
+
+    def __init__(self, in_channels, out_channels):
+        super(FCNHead, self).__init__()
+
+        inter_channels = in_channels // 4
+        self.conv_bn_relu = layer_utils.ConvBnRelu(num_channels=in_channels,
+                                                   num_filters=inter_channels,
+                                                   filter_size=3,
+                                                   padding=1)
+
+        self.conv = Conv2D(num_channels=inter_channels,
+                           num_filters=out_channels,
+                           filter_size=1)
+
+    def forward(self, x):
+        x = self.conv_bn_relu(x)
+        x = F.dropout(x, p=0.1)
+        x = self.conv(x)
+        return x
+
+
+def get_loss(logit, label, ignore_index=255, EPS=1e-5):
+    """
+    compute forward loss of the model
+
+    Args:
+        logit (tensor): the logit of model output
+        label (tensor): ground truth
+
+    Returns:
+        avg_loss (tensor): forward loss
+    """
+    logit = fluid.layers.transpose(logit, [0, 2, 3, 1])
+    label = fluid.layers.transpose(label, [0, 2, 3, 1])
+    mask = label != ignore_index
+    mask = fluid.layers.cast(mask, 'float32')
+    loss, probs = fluid.layers.softmax_with_cross_entropy(
+        logit,
+        label,
+        ignore_index=ignore_index,
+        return_softmax=True,
+        axis=-1)
+
+    loss = loss * mask
+    avg_loss = paddle.mean(loss) / (paddle.mean(mask) + EPS)
+
+    label.stop_gradient = True
+    mask.stop_gradient = True
+
+    return avg_loss
+
+
+def get_pred_score_map(logit):
+    """
+    Get prediction and score map output in inference phase.
+
+    Args:
+        logit (tensor): output logit of network
+
+    Returns:
+        pred (tensor): predition map
+        score_map (tensor): score map
+    """
+    score_map = F.softmax(logit, axis=1)
+    score_map = fluid.layers.transpose(score_map, [0, 2, 3, 1])
+    pred = fluid.layers.argmax(score_map, axis=3)
+    pred = fluid.layers.unsqueeze(pred, axes=[3])
+
+    return pred, score_map
\ No newline at end of file

dygraph/models/pspnet.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.
+
+
+import os
+
+import paddle.nn.functional as F
+from paddle import fluid
+from paddle.fluid.dygraph import Conv2D
+
+from dygraph.cvlibs import manager
+from dygraph.models import model_utils
+from dygraph.models.architectures import layer_utils
+from dygraph.utils import utils
+
+
+class PSPNet(fluid.dygraph.Layer):
+    """
+    The PSPNet implementation
+
+    The orginal artile refers to 
+        Zhao, Hengshuang, et al. "Pyramid scene parsing network." 
+        Proceedings of the IEEE conference on computer vision and pattern recognition. 2017.
+        (https://openaccess.thecvf.com/content_cvpr_2017/papers/Zhao_Pyramid_Scene_Parsing_CVPR_2017_paper.pdf)
+
+    Args:
+        backbone (str): backbone name, currently support Resnet50/101.
+
+        num_classes (int): the unique number of target classes. Default 2.
+
+        output_stride (int): the ratio of input size and final feature size. Default 16.
+
+        backbone_indices (tuple): two values in the tuple indicte the indices of output of backbone.
+                        the first index will be taken as a deep-supervision feature in auxiliary layer;
+                        the second one will be taken as input of Pyramid Pooling Module (PPModule).
+                        Usually backbone consists of four downsampling stage, and return an output of
+                        each stage, so we set default (2, 3), which means taking feature map of the third
+                        stage (res4b22) in backbone, and feature map of the fourth stage (res5c) as input of PPModule.
+
+        backbone_channels (tuple): the same length with "backbone_indices". It indicates the channels of corresponding index.
+
+        pp_out_channels (int): output channels after Pyramid Pooling Module. Default to 1024.
+
+        bin_sizes (tuple): the out size of pooled feature maps. Default to (1,2,3,6).
+
+        enable_auxiliary_loss (bool): a bool values indictes whether adding auxiliary loss. Default to True.
+
+        ignore_index (int): the value of ground-truth mask would be ignored while doing evaluation. Default to 255.
+
+        pretrained_model (str): the pretrained_model path of backbone.
+    """
+
+    def __init__(self,
+                 backbone,
+                 num_classes=2,
+                 output_stride=16,
+                 backbone_indices=(2, 3),
+                 backbone_channels=(1024, 2048),
+                 pp_out_channels=1024,
+                 bin_sizes=(1, 2, 3, 6),
+                 enable_auxiliary_loss=True,
+                 ignore_index=255,
+                 pretrained_model=None):
+
+        super(PSPNet, self).__init__()
+        self.backbone = manager.BACKBONES[backbone](output_stride=output_stride,
+                                                    multi_grid=(1, 1, 1))
+        self.backbone_indices = backbone_indices
+
+        self.psp_module = PPModule(in_channels=backbone_channels[1],
+                                   out_channels=pp_out_channels,
+                                   bin_sizes=bin_sizes)
+
+        self.conv = Conv2D(num_channels=pp_out_channels,
+                           num_filters=num_classes,
+                           filter_size=1)
+
+        if enable_auxiliary_loss:
+            self.fcn_head = model_utils.FCNHead(in_channels=backbone_channels[0], out_channels=num_classes)
+
+        self.enable_auxiliary_loss = enable_auxiliary_loss
+        self.ignore_index = ignore_index
+
+        self.init_weight(pretrained_model)
+
+    def forward(self, input, label=None):
+
+        _, feat_list = self.backbone(input)
+
+        x = feat_list[self.backbone_indices[1]]
+        x = self.psp_module(x)
+        x = F.dropout(x, dropout_prob=0.1)
+        logit = self.conv(x)
+        logit = fluid.layers.resize_bilinear(logit, input.shape[2:])
+
+        if self.enable_auxiliary_loss:
+            auxiliary_feat = feat_list[self.backbone_indices[0]]
+            auxiliary_logit = self.fcn_head(auxiliary_feat)
+            auxiliary_logit = fluid.layers.resize_bilinear(auxiliary_logit, input.shape[2:])
+
+        if self.training:
+            loss = model_utils.get_loss(logit, label)
+            if self.enable_auxiliary_loss:
+                auxiliary_loss = model_utils.get_loss(auxiliary_logit, label)
+                loss += (0.4 * auxiliary_loss)
+            return loss
+
+
+        else:
+            pred, score_map = model_utils.get_pred_score_map(logit)
+            return pred, score_map
+
+    def init_weight(self, pretrained_model=None):
+        """
+        Initialize the parameters of model parts.
+
+        Args:
+            pretrained_model ([str], optional): the pretrained_model path of backbone. Defaults to None.
+        """
+
+        if pretrained_model is not None:
+            if os.path.exists(pretrained_model):
+                utils.load_pretrained_model(self.backbone, pretrained_model)
+
+
+class PPModule(fluid.dygraph.Layer):
+    """
+    Pyramid pooling module
+
+    Args:
+        in_channels (int): the number of intput channels to pyramid pooling module.
+
+        out_channels (int): the number of output channels after pyramid pooling module.
+
+        bin_sizes (tuple): the out size of pooled feature maps. Default to (1,2,3,6).
+    """
+
+    def __init__(self, in_channels, out_channels, bin_sizes=(1, 2, 3, 6)):
+        super(PPModule, self).__init__()
+        self.bin_sizes = bin_sizes
+
+        # we use dimension reduction after pooling mentioned in original implementation.
+        self.stages = fluid.dygraph.LayerList([self._make_stage(in_channels, size) for size in bin_sizes])
+
+        self.conv_bn_relu2 = layer_utils.ConvBnRelu(num_channels=in_channels * 2,
+                                                    num_filters=out_channels,
+                                                    filter_size=3,
+                                                    padding=1)
+
+    def _make_stage(self, in_channels, size):
+        """
+        Create one pooling layer.
+
+        In our implementation, we adopt the same dimention reduction as the original paper that might be
+        slightly different with other implementations. 
+
+        After pooling, the channels are reduced to 1/len(bin_sizes) immediately, while some other implementations
+        keep the channels to be same.
+
+
+        Args:
+            in_channels (int): the number of intput channels to pyramid pooling module.
+
+            size (int): the out size of the pooled layer.
+
+        Returns:
+            conv (tensor): a tensor after Pyramid Pooling Module
+        """
+
+        # this paddle version does not support AdaptiveAvgPool2d, so skip it here.
+        # prior = nn.AdaptiveAvgPool2d(output_size=(size, size))
+        conv = layer_utils.ConvBnRelu(num_channels=in_channels,
+                                      num_filters=in_channels // len(self.bin_sizes),
+                                      filter_size=1)
+
+        return conv
+
+    def forward(self, input):
+        cat_layers = []
+        for i, stage in enumerate(self.stages):
+            size = self.bin_sizes[i]
+            x = fluid.layers.adaptive_pool2d(input, pool_size=(size, size), pool_type="max")
+            x = stage(x)
+            x = fluid.layers.resize_bilinear(x, out_shape=input.shape[2:])
+            cat_layers.append(x)
+        cat_layers = [input] + cat_layers[::-1]
+        cat = fluid.layers.concat(cat_layers, axis=1)
+        out = self.conv_bn_relu2(cat)
+
+        return out
+
+
+@manager.MODELS.add_component
+def pspnet_resnet101_vd(*args, **kwargs):
+    pretrained_model = None
+    return PSPNet(backbone='ResNet101_vd', pretrained_model=pretrained_model, **kwargs)
+
+
+@manager.MODELS.add_component
+def pspnet_resnet101_vd_os8(*args, **kwargs):
+    pretrained_model = None
+    return PSPNet(backbone='ResNet101_vd', output_stride=8, pretrained_model=pretrained_model, **kwargs)
+
+
+@manager.MODELS.add_component
+def pspnet_resnet50_vd(*args, **kwargs):
+    pretrained_model = None
+    return PSPNet(backbone='ResNet50_vd', pretrained_model=pretrained_model, **kwargs)
+
+
+@manager.MODELS.add_component
+def pspnet_resnet50_vd_os8(*args, **kwargs):
+    pretrained_model = None
+    return PSPNet(backbone='ResNet50_vd', output_stride=8, pretrained_model=pretrained_model, **kwargs)