add resnet series

hub_module/modules/image/classification/resnet101_imagenet/module.py

+# copyright (c) 2020 PaddlePaddle Authors. All Rights Reserve.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import os
+import math
+
+import numpy as np
+import paddle
+from paddle import ParamAttr
+import paddle.nn as nn
+from paddle.nn import Conv2d, BatchNorm, Linear, Dropout
+from paddle.nn import AdaptiveAvgPool2d, MaxPool2d, AvgPool2d
+from paddle.nn.initializer import Uniform
+from paddlehub.module.module import moduleinfo
+from paddlehub.module.cv_module import ImageClassifierModule
+
+
+class ConvBNLayer(nn.Layer):
+    """Basic conv bn layer."""
+    def __init__(self,
+                 num_channels: int,
+                 num_filters: int,
+                 filter_size: int,
+                 stride: int = 1,
+                 groups: int = 1,
+                 act: str = None,
+                 name: str = None):
+        super(ConvBNLayer, self).__init__()
+
+        self._conv = Conv2d(in_channels=num_channels,
+                            out_channels=num_filters,
+                            kernel_size=filter_size,
+                            stride=stride,
+                            padding=(filter_size - 1) // 2,
+                            groups=groups,
+                            weight_attr=ParamAttr(name=name + "_weights"),
+                            bias_attr=False)
+        if name == "conv1":
+            bn_name = "bn_" + name
+        else:
+            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")
+
+    def forward(self, inputs: paddle.Tensor):
+        y = self._conv(inputs)
+        y = self._batch_norm(y)
+        return y
+
+
+class BottleneckBlock(nn.Layer):
+    """Bottleneck Block for ResNet101."""
+    def __init__(self, num_channels: int, num_filters: int, stride: int, shortcut: bool = True, name: str = None):
+        super(BottleneckBlock, self).__init__()
+
+        self.conv0 = ConvBNLayer(num_channels=num_channels,
+                                 num_filters=num_filters,
+                                 filter_size=1,
+                                 act="relu",
+                                 name=name + "_branch2a")
+        self.conv1 = ConvBNLayer(num_channels=num_filters,
+                                 num_filters=num_filters,
+                                 filter_size=3,
+                                 stride=stride,
+                                 act="relu",
+                                 name=name + "_branch2b")
+        self.conv2 = ConvBNLayer(num_channels=num_filters,
+                                 num_filters=num_filters * 4,
+                                 filter_size=1,
+                                 act=None,
+                                 name=name + "_branch2c")
+
+        if not shortcut:
+            self.short = ConvBNLayer(num_channels=num_channels,
+                                     num_filters=num_filters * 4,
+                                     filter_size=1,
+                                     stride=stride,
+                                     name=name + "_branch1")
+
+        self.shortcut = shortcut
+
+        self._num_channels_out = num_filters * 4
+
+    def forward(self, inputs: paddle.Tensor):
+        y = self.conv0(inputs)
+        conv1 = self.conv1(y)
+        conv2 = self.conv2(conv1)
+
+        if self.shortcut:
+            short = inputs
+        else:
+            short = self.short(inputs)
+
+        y = paddle.elementwise_add(x=short, y=conv2, act="relu")
+        return y
+
+
+class BasicBlock(nn.Layer):
+    """Basic block for ResNet101."""
+    def __init__(self, num_channels: int, num_filters: int, stride: int, shortcut: bool = True, name: str = None):
+        super(BasicBlock, self).__init__()
+        self.stride = stride
+        self.conv0 = ConvBNLayer(num_channels=num_channels,
+                                 num_filters=num_filters,
+                                 filter_size=3,
+                                 stride=stride,
+                                 act="relu",
+                                 name=name + "_branch2a")
+        self.conv1 = ConvBNLayer(num_channels=num_filters,
+                                 num_filters=num_filters,
+                                 filter_size=3,
+                                 act=None,
+                                 name=name + "_branch2b")
+
+        if not shortcut:
+            self.short = ConvBNLayer(num_channels=num_channels,
+                                     num_filters=num_filters,
+                                     filter_size=1,
+                                     stride=stride,
+                                     name=name + "_branch1")
+
+        self.shortcut = shortcut
+
+    def forward(self, inputs: paddle.Tensor):
+        y = self.conv0(inputs)
+        conv1 = self.conv1(y)
+
+        if self.shortcut:
+            short = inputs
+        else:
+            short = self.short(inputs)
+        y = paddle.elementwise_add(x=short, y=conv1, act="relu")
+        return y
+
+
+@moduleinfo(name="resnet101_imagenet",
+            type="CV/classification",
+            author="paddlepaddle",
+            author_email="",
+            summary="resnet101_imagenet is a classification model, "
+            "this module is trained with Baidu open sourced dataset.",
+            version="1.1.0",
+            meta=ImageClassifierModule)
+class ResNet101(nn.Layer):
+    """ResNet101 model."""
+    def __init__(self, class_dim: int = 1000, load_checkpoint: str = None):
+        super(ResNet101, self).__init__()
+
+        self.layers = 101
+        depth = [3, 4, 23, 3]
+        num_channels = [64, 256, 512, 1024]
+        num_filters = [64, 128, 256, 512]
+
+        self.conv = ConvBNLayer(num_channels=3, num_filters=64, filter_size=7, stride=2, act="relu", name="conv1")
+        self.pool2d_max = MaxPool2d(kernel_size=3, stride=2, padding=1)
+
+        self.block_list = []
+
+        for block in range(len(depth)):
+            shortcut = False
+            for i in range(depth[block]):
+                if block == 2:
+                    if i == 0:
+                        conv_name = "res" + str(block + 2) + "a"
+                    else:
+                        conv_name = "res" + str(block + 2) + "b" + str(i)
+                else:
+                    conv_name = "res" + str(block + 2) + chr(97 + i)
+                bottleneck_block = self.add_sublayer(
+                    conv_name,
+                    BottleneckBlock(num_channels=num_channels[block] if i == 0 else num_filters[block] * 4,
+                                    num_filters=num_filters[block],
+                                    stride=2 if i == 0 and block != 0 else 1,
+                                    shortcut=shortcut,
+                                    name=conv_name))
+                self.block_list.append(bottleneck_block)
+                shortcut = True
+
+        self.pool2d_avg = AdaptiveAvgPool2d(1)
+
+        self.pool2d_avg_channels = num_channels[-1] * 2
+
+        stdv = 1.0 / math.sqrt(self.pool2d_avg_channels * 1.0)
+
+        self.out = Linear(self.pool2d_avg_channels,
+                          class_dim,
+                          weight_attr=ParamAttr(initializer=Uniform(-stdv, stdv), name="fc_0.w_0"),
+                          bias_attr=ParamAttr(name="fc_0.b_0"))
+
+        if load_checkpoint is not None:
+            model_dict = paddle.load(load_checkpoint)[0]
+            self.set_dict(model_dict)
+            print("load custom checkpoint success")
+
+        else:
+            checkpoint = os.path.join(self.directory, 'resnet101_imagenet.pdparams')
+            if not os.path.exists(checkpoint):
+                os.system(
+                    'wget https://paddlehub.bj.bcebos.com/dygraph/image_classification/resnet101_imagenet.pdparams -O '
+                    + checkpoint)
+            model_dict = paddle.load(checkpoint)[0]
+            self.set_dict(model_dict)
+            print("load pretrained checkpoint success")
+
+    def forward(self, inputs: paddle.Tensor):
+        y = self.conv(inputs)
+        y = self.pool2d_max(y)
+        for block in self.block_list:
+            y = block(y)
+        y = self.pool2d_avg(y)
+        y = paddle.reshape(y, shape=[-1, self.pool2d_avg_channels])
+        y = self.out(y)
+        return y

hub_module/modules/image/classification/resnet101_vd_imagenet/module.py

+# copyright (c) 2020 PaddlePaddle Authors. All Rights Reserve.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+import os
+import math
+
+import numpy as np
+import paddle
+from paddle import ParamAttr
+import paddle.nn as nn
+from paddle.nn import Conv2d, BatchNorm, Linear, Dropout
+from paddle.nn import AdaptiveAvgPool2d, MaxPool2d, AvgPool2d
+from paddle.nn.initializer import Uniform
+from paddlehub.module.module import moduleinfo
+from paddlehub.module.cv_module import ImageClassifierModule
+
+
+class ConvBNLayer(nn.Layer):
+    """Basic conv bn layer."""
+    def __init__(
+        self,
+        num_channels: int,
+        num_filters: int,
+        filter_size: int,
+        stride: int = 1,
+        groups: int = 1,
+        is_vd_mode: bool = False,
+        act: str = None,
+        name: str = None,
+    ):
+        super(ConvBNLayer, self).__init__()
+
+        self.is_vd_mode = is_vd_mode
+        self._pool2d_avg = AvgPool2d(kernel_size=2, stride=2, padding=0, ceil_mode=True)
+        self._conv = Conv2d(in_channels=num_channels,
+                            out_channels=num_filters,
+                            kernel_size=filter_size,
+                            stride=stride,
+                            padding=(filter_size - 1) // 2,
+                            groups=groups,
+                            weight_attr=ParamAttr(name=name + "_weights"),
+                            bias_attr=False)
+        if name == "conv1":
+            bn_name = "bn_" + name
+        else:
+            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')
+
+    def forward(self, inputs: paddle.Tensor):
+        if self.is_vd_mode:
+            inputs = self._pool2d_avg(inputs)
+        y = self._conv(inputs)
+        y = self._batch_norm(y)
+        return y
+
+
+class BottleneckBlock(nn.Layer):
+    """Bottleneck Block for ResNet101_vd."""
+    def __init__(self,
+                 num_channels: int,
+                 num_filters: int,
+                 stride: int,
+                 shortcut: bool = True,
+                 if_first: bool = False,
+                 name: str = None):
+        super(BottleneckBlock, self).__init__()
+
+        self.conv0 = ConvBNLayer(num_channels=num_channels,
+                                 num_filters=num_filters,
+                                 filter_size=1,
+                                 act='relu',
+                                 name=name + "_branch2a")
+        self.conv1 = ConvBNLayer(num_channels=num_filters,
+                                 num_filters=num_filters,
+                                 filter_size=3,
+                                 stride=stride,
+                                 act='relu',
+                                 name=name + "_branch2b")
+        self.conv2 = ConvBNLayer(num_channels=num_filters,
+                                 num_filters=num_filters * 4,
+                                 filter_size=1,
+                                 act=None,
+                                 name=name + "_branch2c")
+
+        if not shortcut:
+            self.short = ConvBNLayer(num_channels=num_channels,
+                                     num_filters=num_filters * 4,
+                                     filter_size=1,
+                                     stride=1,
+                                     is_vd_mode=False if if_first else True,
+                                     name=name + "_branch1")
+
+        self.shortcut = shortcut
+
+    def forward(self, inputs: paddle.Tensor):
+        y = self.conv0(inputs)
+        conv1 = self.conv1(y)
+        conv2 = self.conv2(conv1)
+
+        if self.shortcut:
+            short = inputs
+        else:
+            short = self.short(inputs)
+        y = paddle.elementwise_add(x=short, y=conv2, act='relu')
+        return y
+
+
+class BasicBlock(nn.Layer):
+    """Basic block for ResNet101_vd."""
+    def __init__(self,
+                 num_channels: int,
+                 num_filters: int,
+                 stride: int,
+                 shortcut: bool = True,
+                 if_first: bool = False,
+                 name: str = None):
+        super(BasicBlock, self).__init__()
+        self.stride = stride
+        self.conv0 = ConvBNLayer(num_channels=num_channels,
+                                 num_filters=num_filters,
+                                 filter_size=3,
+                                 stride=stride,
+                                 act='relu',
+                                 name=name + "_branch2a")
+        self.conv1 = ConvBNLayer(num_channels=num_filters,
+                                 num_filters=num_filters,
+                                 filter_size=3,
+                                 act=None,
+                                 name=name + "_branch2b")
+
+        if not shortcut:
+            self.short = ConvBNLayer(num_channels=num_channels,
+                                     num_filters=num_filters,
+                                     filter_size=1,
+                                     stride=1,
+                                     is_vd_mode=False if if_first else True,
+                                     name=name + "_branch1")
+
+        self.shortcut = shortcut
+
+    def forward(self, inputs: paddle.Tensor):
+        y = self.conv0(inputs)
+        conv1 = self.conv1(y)
+
+        if self.shortcut:
+            short = inputs
+        else:
+            short = self.short(inputs)
+        y = paddle.elementwise_add(x=short, y=conv1, act='relu')
+        return y
+
+
+@moduleinfo(name="resnet101_vd_imagenet",
+            type="CV/classification",
+            author="paddlepaddle",
+            author_email="",
+            summary="resnet101_vd_imagenet is a classification model, "
+            "this module is trained with Imagenet dataset.",
+            version="1.1.0",
+            meta=ImageClassifierModule)
+class ResNet101_vd(nn.Layer):
+    """ResNet101_vd model."""
+    def __init__(self, class_dim: int = 1000, load_checkpoint: str = None):
+        super(ResNet101_vd, self).__init__()
+
+        self.layers = 101
+
+        depth = [3, 4, 23, 3]
+        num_channels = [64, 256, 512, 1024]
+        num_filters = [64, 128, 256, 512]
+
+        self.conv1_1 = ConvBNLayer(num_channels=3, num_filters=32, filter_size=3, stride=2, act='relu', name="conv1_1")
+        self.conv1_2 = ConvBNLayer(num_channels=32, num_filters=32, filter_size=3, stride=1, act='relu', name="conv1_2")
+        self.conv1_3 = ConvBNLayer(num_channels=32, num_filters=64, filter_size=3, stride=1, act='relu', name="conv1_3")
+        self.pool2d_max = MaxPool2d(kernel_size=3, stride=2, padding=1)
+
+        self.block_list = []
+
+        for block in range(len(depth)):
+            shortcut = False
+            for i in range(depth[block]):
+                if block == 2:
+                    if i == 0:
+                        conv_name = "res" + str(block + 2) + "a"
+                    else:
+                        conv_name = "res" + str(block + 2) + "b" + str(i)
+                else:
+                    conv_name = "res" + str(block + 2) + chr(97 + i)
+
+                bottleneck_block = self.add_sublayer(
+                    'bb_%d_%d' % (block, i),
+                    BottleneckBlock(num_channels=num_channels[block] if i == 0 else num_filters[block] * 4,
+                                    num_filters=num_filters[block],
+                                    stride=2 if i == 0 and block != 0 else 1,
+                                    shortcut=shortcut,
+                                    if_first=block == i == 0,
+                                    name=conv_name))
+                self.block_list.append(bottleneck_block)
+                shortcut = True
+
+        self.pool2d_avg = AdaptiveAvgPool2d(1)
+        self.pool2d_avg_channels = num_channels[-1] * 2
+        stdv = 1.0 / math.sqrt(self.pool2d_avg_channels * 1.0)
+
+        self.out = Linear(self.pool2d_avg_channels,
+                          class_dim,
+                          weight_attr=ParamAttr(initializer=Uniform(-stdv, stdv), name="fc_0.w_0"),
+                          bias_attr=ParamAttr(name="fc_0.b_0"))
+
+        if load_checkpoint is not None:
+            model_dict = paddle.load(load_checkpoint)[0]
+            self.set_dict(model_dict)
+            print("load custom checkpoint success")
+
+        else:
+            checkpoint = os.path.join(self.directory, 'resnet101_vd_imagenet.pdparams')
+            if not os.path.exists(checkpoint):
+                os.system(
+                    'wget https://paddlehub.bj.bcebos.com/dygraph/image_classification/resnet101_vd_imagenet.pdparams -O '
+                    + checkpoint)
+            model_dict = paddle.load(checkpoint)[0]
+            self.set_dict(model_dict)
+            print("load pretrained checkpoint success")
+
+    def forward(self, inputs: paddle.Tensor):
+        y = self.conv1_1(inputs)
+        y = self.conv1_2(y)
+        y = self.conv1_3(y)
+        y = self.pool2d_max(y)
+        for block in self.block_list:
+            y = block(y)
+        y = self.pool2d_avg(y)
+        y = paddle.reshape(y, shape=[-1, self.pool2d_avg_channels])
+        y = self.out(y)
+        return y

hub_module/modules/image/classification/resnet101_vd_imagenet_ssld/module.py

+# copyright (c) 2020 PaddlePaddle Authors. All Rights Reserve.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+import os
+import math
+
+import numpy as np
+import paddle
+from paddle import ParamAttr
+import paddle.nn as nn
+from paddle.nn import Conv2d, BatchNorm, Linear, Dropout
+from paddle.nn import AdaptiveAvgPool2d, MaxPool2d, AvgPool2d
+from paddle.nn.initializer import Uniform
+from paddlehub.module.module import moduleinfo
+from paddlehub.module.cv_module import ImageClassifierModule
+
+
+class ConvBNLayer(nn.Layer):
+    """Basic conv bn layer."""
+    def __init__(
+        self,
+        num_channels: int,
+        num_filters: int,
+        filter_size: int,
+        stride: int = 1,
+        groups: int = 1,
+        is_vd_mode: bool = False,
+        act: str = None,
+        name: str = None,
+    ):
+        super(ConvBNLayer, self).__init__()
+
+        self.is_vd_mode = is_vd_mode
+        self._pool2d_avg = AvgPool2d(kernel_size=2, stride=2, padding=0, ceil_mode=True)
+        self._conv = Conv2d(in_channels=num_channels,
+                            out_channels=num_filters,
+                            kernel_size=filter_size,
+                            stride=stride,
+                            padding=(filter_size - 1) // 2,
+                            groups=groups,
+                            weight_attr=ParamAttr(name=name + "_weights"),
+                            bias_attr=False)
+        if name == "conv1":
+            bn_name = "bn_" + name
+        else:
+            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')
+
+    def forward(self, inputs: paddle.Tensor):
+        if self.is_vd_mode:
+            inputs = self._pool2d_avg(inputs)
+        y = self._conv(inputs)
+        y = self._batch_norm(y)
+        return y
+
+
+class BottleneckBlock(nn.Layer):
+    """Bottleneck Block for ResNet101_vd."""
+    def __init__(self,
+                 num_channels: int,
+                 num_filters: int,
+                 stride: int,
+                 shortcut: bool = True,
+                 if_first: bool = False,
+                 name: str = None):
+        super(BottleneckBlock, self).__init__()
+
+        self.conv0 = ConvBNLayer(num_channels=num_channels,
+                                 num_filters=num_filters,
+                                 filter_size=1,
+                                 act='relu',
+                                 name=name + "_branch2a")
+        self.conv1 = ConvBNLayer(num_channels=num_filters,
+                                 num_filters=num_filters,
+                                 filter_size=3,
+                                 stride=stride,
+                                 act='relu',
+                                 name=name + "_branch2b")
+        self.conv2 = ConvBNLayer(num_channels=num_filters,
+                                 num_filters=num_filters * 4,
+                                 filter_size=1,
+                                 act=None,
+                                 name=name + "_branch2c")
+
+        if not shortcut:
+            self.short = ConvBNLayer(num_channels=num_channels,
+                                     num_filters=num_filters * 4,
+                                     filter_size=1,
+                                     stride=1,
+                                     is_vd_mode=False if if_first else True,
+                                     name=name + "_branch1")
+
+        self.shortcut = shortcut
+
+    def forward(self, inputs: paddle.Tensor):
+        y = self.conv0(inputs)
+        conv1 = self.conv1(y)
+        conv2 = self.conv2(conv1)
+
+        if self.shortcut:
+            short = inputs
+        else:
+            short = self.short(inputs)
+        y = paddle.elementwise_add(x=short, y=conv2, act='relu')
+        return y
+
+
+class BasicBlock(nn.Layer):
+    """Basic block for ResNet101_vd."""
+    def __init__(self,
+                 num_channels: int,
+                 num_filters: int,
+                 stride: int,
+                 shortcut: bool = True,
+                 if_first: bool = False,
+                 name: str = None):
+        super(BasicBlock, self).__init__()
+        self.stride = stride
+        self.conv0 = ConvBNLayer(num_channels=num_channels,
+                                 num_filters=num_filters,
+                                 filter_size=3,
+                                 stride=stride,
+                                 act='relu',
+                                 name=name + "_branch2a")
+        self.conv1 = ConvBNLayer(num_channels=num_filters,
+                                 num_filters=num_filters,
+                                 filter_size=3,
+                                 act=None,
+                                 name=name + "_branch2b")
+
+        if not shortcut:
+            self.short = ConvBNLayer(num_channels=num_channels,
+                                     num_filters=num_filters,
+                                     filter_size=1,
+                                     stride=1,
+                                     is_vd_mode=False if if_first else True,
+                                     name=name + "_branch1")
+
+        self.shortcut = shortcut
+
+    def forward(self, inputs: paddle.Tensor):
+        y = self.conv0(inputs)
+        conv1 = self.conv1(y)
+
+        if self.shortcut:
+            short = inputs
+        else:
+            short = self.short(inputs)
+        y = paddle.elementwise_add(x=short, y=conv1, act='relu')
+        return y
+
+
+@moduleinfo(name="resnet101_vd_imagenet_ssld",
+            type="CV/classification",
+            author="paddlepaddle",
+            author_email="",
+            summary="resnet101_vd_imagenet_ssld is a classification model, "
+            "this module is trained with Imagenet dataset.",
+            version="1.1.0",
+            meta=ImageClassifierModule)
+class ResNet101_vd(nn.Layer):
+    """ResNet101_vd model."""
+    def __init__(self, class_dim: int = 1000, load_checkpoint: str = None):
+        super(ResNet101_vd, self).__init__()
+
+        self.layers = 101
+
+        depth = [3, 4, 23, 3]
+        num_channels = [64, 256, 512, 1024]
+        num_filters = [64, 128, 256, 512]
+
+        self.conv1_1 = ConvBNLayer(num_channels=3, num_filters=32, filter_size=3, stride=2, act='relu', name="conv1_1")
+        self.conv1_2 = ConvBNLayer(num_channels=32, num_filters=32, filter_size=3, stride=1, act='relu', name="conv1_2")
+        self.conv1_3 = ConvBNLayer(num_channels=32, num_filters=64, filter_size=3, stride=1, act='relu', name="conv1_3")
+        self.pool2d_max = MaxPool2d(kernel_size=3, stride=2, padding=1)
+
+        self.block_list = []
+
+        for block in range(len(depth)):
+            shortcut = False
+            for i in range(depth[block]):
+                if block == 2:
+                    if i == 0:
+                        conv_name = "res" + str(block + 2) + "a"
+                    else:
+                        conv_name = "res" + str(block + 2) + "b" + str(i)
+                else:
+                    conv_name = "res" + str(block + 2) + chr(97 + i)
+
+                bottleneck_block = self.add_sublayer(
+                    'bb_%d_%d' % (block, i),
+                    BottleneckBlock(num_channels=num_channels[block] if i == 0 else num_filters[block] * 4,
+                                    num_filters=num_filters[block],
+                                    stride=2 if i == 0 and block != 0 else 1,
+                                    shortcut=shortcut,
+                                    if_first=block == i == 0,
+                                    name=conv_name))
+                self.block_list.append(bottleneck_block)
+                shortcut = True
+
+        self.pool2d_avg = AdaptiveAvgPool2d(1)
+        self.pool2d_avg_channels = num_channels[-1] * 2
+        stdv = 1.0 / math.sqrt(self.pool2d_avg_channels * 1.0)
+
+        self.out = Linear(self.pool2d_avg_channels,
+                          class_dim,
+                          weight_attr=ParamAttr(initializer=Uniform(-stdv, stdv), name="fc_0.w_0"),
+                          bias_attr=ParamAttr(name="fc_0.b_0"))
+
+        if load_checkpoint is not None:
+            model_dict = paddle.load(load_checkpoint)[0]
+            self.set_dict(model_dict)
+            print("load custom checkpoint success")
+
+        else:
+            checkpoint = os.path.join(self.directory, 'resnet101_vd_ssld_imagenet.pdparams')
+            if not os.path.exists(checkpoint):
+                os.system(
+                    'wget https://paddlehub.bj.bcebos.com/dygraph/image_classification/resnet101_vd_ssld_imagenet.pdparams -O '
+                    + checkpoint)
+            model_dict = paddle.load(checkpoint)[0]
+            self.set_dict(model_dict)
+            print("load pretrained checkpoint success")
+
+    def forward(self, inputs: paddle.Tensor):
+        y = self.conv1_1(inputs)
+        y = self.conv1_2(y)
+        y = self.conv1_3(y)
+        y = self.pool2d_max(y)
+        for block in self.block_list:
+            y = block(y)
+        y = self.pool2d_avg(y)
+        y = paddle.reshape(y, shape=[-1, self.pool2d_avg_channels])
+        y = self.out(y)
+        return y

hub_module/modules/image/classification/resnet152_imagenet/module.py

+# copyright (c) 2020 PaddlePaddle Authors. All Rights Reserve.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import os
+import math
+
+import numpy as np
+import paddle
+from paddle import ParamAttr
+import paddle.nn as nn
+from paddle.nn import Conv2d, BatchNorm, Linear, Dropout
+from paddle.nn import AdaptiveAvgPool2d, MaxPool2d, AvgPool2d
+from paddle.nn.initializer import Uniform
+from paddlehub.module.module import moduleinfo
+from paddlehub.module.cv_module import ImageClassifierModule
+
+
+class ConvBNLayer(nn.Layer):
+    """Basic conv bn layer."""
+    def __init__(self,
+                 num_channels: int,
+                 num_filters: int,
+                 filter_size: int,
+                 stride: int = 1,
+                 groups: int = 1,
+                 act: str = None,
+                 name: str = None):
+        super(ConvBNLayer, self).__init__()
+
+        self._conv = Conv2d(in_channels=num_channels,
+                            out_channels=num_filters,
+                            kernel_size=filter_size,
+                            stride=stride,
+                            padding=(filter_size - 1) // 2,
+                            groups=groups,
+                            weight_attr=ParamAttr(name=name + "_weights"),
+                            bias_attr=False)
+        if name == "conv1":
+            bn_name = "bn_" + name
+        else:
+            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")
+
+    def forward(self, inputs: paddle.Tensor):
+        y = self._conv(inputs)
+        y = self._batch_norm(y)
+        return y
+
+
+class BottleneckBlock(nn.Layer):
+    """Bottleneck Block for ResNet152."""
+    def __init__(self, num_channels: int, num_filters: int, stride: int, shortcut: bool = True, name: str = None):
+        super(BottleneckBlock, self).__init__()
+
+        self.conv0 = ConvBNLayer(num_channels=num_channels,
+                                 num_filters=num_filters,
+                                 filter_size=1,
+                                 act="relu",
+                                 name=name + "_branch2a")
+        self.conv1 = ConvBNLayer(num_channels=num_filters,
+                                 num_filters=num_filters,
+                                 filter_size=3,
+                                 stride=stride,
+                                 act="relu",
+                                 name=name + "_branch2b")
+        self.conv2 = ConvBNLayer(num_channels=num_filters,
+                                 num_filters=num_filters * 4,
+                                 filter_size=1,
+                                 act=None,
+                                 name=name + "_branch2c")
+
+        if not shortcut:
+            self.short = ConvBNLayer(num_channels=num_channels,
+                                     num_filters=num_filters * 4,
+                                     filter_size=1,
+                                     stride=stride,
+                                     name=name + "_branch1")
+
+        self.shortcut = shortcut
+
+        self._num_channels_out = num_filters * 4
+
+    def forward(self, inputs: paddle.Tensor):
+        y = self.conv0(inputs)
+        conv1 = self.conv1(y)
+        conv2 = self.conv2(conv1)
+
+        if self.shortcut:
+            short = inputs
+        else:
+            short = self.short(inputs)
+
+        y = paddle.elementwise_add(x=short, y=conv2, act="relu")
+        return y
+
+
+class BasicBlock(nn.Layer):
+    """Basic block for ResNet152."""
+    def __init__(self, num_channels: int, num_filters: int, stride: int, shortcut: bool = True, name: str = None):
+        super(BasicBlock, self).__init__()
+        self.stride = stride
+        self.conv0 = ConvBNLayer(num_channels=num_channels,
+                                 num_filters=num_filters,
+                                 filter_size=3,
+                                 stride=stride,
+                                 act="relu",
+                                 name=name + "_branch2a")
+        self.conv1 = ConvBNLayer(num_channels=num_filters,
+                                 num_filters=num_filters,
+                                 filter_size=3,
+                                 act=None,
+                                 name=name + "_branch2b")
+
+        if not shortcut:
+            self.short = ConvBNLayer(num_channels=num_channels,
+                                     num_filters=num_filters,
+                                     filter_size=1,
+                                     stride=stride,
+                                     name=name + "_branch1")
+
+        self.shortcut = shortcut
+
+    def forward(self, inputs: paddle.Tensor):
+        y = self.conv0(inputs)
+        conv1 = self.conv1(y)
+
+        if self.shortcut:
+            short = inputs
+        else:
+            short = self.short(inputs)
+        y = paddle.elementwise_add(x=short, y=conv1, act="relu")
+        return y
+
+
+@moduleinfo(name="resnet152_imagenet",
+            type="CV/classification",
+            author="paddlepaddle",
+            author_email="",
+            summary="resnet152_imagenet is a classification model, "
+            "this module is trained with Baidu open sourced dataset.",
+            version="1.1.0",
+            meta=ImageClassifierModule)
+class ResNet152(nn.Layer):
+    """ResNet152 model."""
+    def __init__(self, class_dim: int = 1000, load_checkpoint: str = None):
+        super(ResNet152, self).__init__()
+
+        self.layers = 152
+        depth = [3, 8, 36, 3]
+        num_channels = [64, 256, 512, 1024]
+        num_filters = [64, 128, 256, 512]
+
+        self.conv = ConvBNLayer(num_channels=3, num_filters=64, filter_size=7, stride=2, act="relu", name="conv1")
+        self.pool2d_max = MaxPool2d(kernel_size=3, stride=2, padding=1)
+
+        self.block_list = []
+
+        for block in range(len(depth)):
+            shortcut = False
+            for i in range(depth[block]):
+                if block == 2:
+                    if i == 0:
+                        conv_name = "res" + str(block + 2) + "a"
+                    else:
+                        conv_name = "res" + str(block + 2) + "b" + str(i)
+                else:
+                    conv_name = "res" + str(block + 2) + chr(97 + i)
+
+                bottleneck_block = self.add_sublayer(
+                    conv_name,
+                    BottleneckBlock(num_channels=num_channels[block] if i == 0 else num_filters[block] * 4,
+                                    num_filters=num_filters[block],
+                                    stride=2 if i == 0 and block != 0 else 1,
+                                    shortcut=shortcut,
+                                    name=conv_name))
+                self.block_list.append(bottleneck_block)
+                shortcut = True
+
+        self.pool2d_avg = AdaptiveAvgPool2d(1)
+
+        self.pool2d_avg_channels = num_channels[-1] * 2
+
+        stdv = 1.0 / math.sqrt(self.pool2d_avg_channels * 1.0)
+
+        self.out = Linear(self.pool2d_avg_channels,
+                          class_dim,
+                          weight_attr=ParamAttr(initializer=Uniform(-stdv, stdv), name="fc_0.w_0"),
+                          bias_attr=ParamAttr(name="fc_0.b_0"))
+
+        if load_checkpoint is not None:
+            model_dict = paddle.load(load_checkpoint)[0]
+            self.set_dict(model_dict)
+            print("load custom checkpoint success")
+
+        else:
+            checkpoint = os.path.join(self.directory, 'resnet152_imagenet.pdparams')
+            if not os.path.exists(checkpoint):
+                os.system(
+                    'wget https://paddlehub.bj.bcebos.com/dygraph/image_classification/resnet152_imagenet.pdparams -O '
+                    + checkpoint)
+            model_dict = paddle.load(checkpoint)[0]
+            self.set_dict(model_dict)
+            print("load pretrained checkpoint success")
+
+    def forward(self, inputs: paddle.Tensor):
+        y = self.conv(inputs)
+        y = self.pool2d_max(y)
+        for block in self.block_list:
+            y = block(y)
+        y = self.pool2d_avg(y)
+        y = paddle.reshape(y, shape=[-1, self.pool2d_avg_channels])
+        y = self.out(y)
+        return y

hub_module/modules/image/classification/resnet152_vd_imagenet/module.py

+# copyright (c) 2020 PaddlePaddle Authors. All Rights Reserve.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+import os
+import math
+
+import numpy as np
+import paddle
+from paddle import ParamAttr
+import paddle.nn as nn
+from paddle.nn import Conv2d, BatchNorm, Linear, Dropout
+from paddle.nn import AdaptiveAvgPool2d, MaxPool2d, AvgPool2d
+from paddle.nn.initializer import Uniform
+from paddlehub.module.module import moduleinfo
+from paddlehub.module.cv_module import ImageClassifierModule
+
+
+class ConvBNLayer(nn.Layer):
+    """Basic conv bn layer."""
+    def __init__(
+        self,
+        num_channels: int,
+        num_filters: int,
+        filter_size: int,
+        stride: int = 1,
+        groups: int = 1,
+        is_vd_mode: bool = False,
+        act: str = None,
+        name: str = None,
+    ):
+        super(ConvBNLayer, self).__init__()
+
+        self.is_vd_mode = is_vd_mode
+        self._pool2d_avg = AvgPool2d(kernel_size=2, stride=2, padding=0, ceil_mode=True)
+        self._conv = Conv2d(in_channels=num_channels,
+                            out_channels=num_filters,
+                            kernel_size=filter_size,
+                            stride=stride,
+                            padding=(filter_size - 1) // 2,
+                            groups=groups,
+                            weight_attr=ParamAttr(name=name + "_weights"),
+                            bias_attr=False)
+        if name == "conv1":
+            bn_name = "bn_" + name
+        else:
+            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')
+
+    def forward(self, inputs: paddle.Tensor):
+        if self.is_vd_mode:
+            inputs = self._pool2d_avg(inputs)
+        y = self._conv(inputs)
+        y = self._batch_norm(y)
+        return y
+
+
+class BottleneckBlock(nn.Layer):
+    """Bottleneck Block for ResNet152_vd."""
+    def __init__(self,
+                 num_channels: int,
+                 num_filters: int,
+                 stride: int,
+                 shortcut: bool = True,
+                 if_first: bool = False,
+                 name: str = None):
+        super(BottleneckBlock, self).__init__()
+
+        self.conv0 = ConvBNLayer(num_channels=num_channels,
+                                 num_filters=num_filters,
+                                 filter_size=1,
+                                 act='relu',
+                                 name=name + "_branch2a")
+        self.conv1 = ConvBNLayer(num_channels=num_filters,
+                                 num_filters=num_filters,
+                                 filter_size=3,
+                                 stride=stride,
+                                 act='relu',
+                                 name=name + "_branch2b")
+        self.conv2 = ConvBNLayer(num_channels=num_filters,
+                                 num_filters=num_filters * 4,
+                                 filter_size=1,
+                                 act=None,
+                                 name=name + "_branch2c")
+
+        if not shortcut:
+            self.short = ConvBNLayer(num_channels=num_channels,
+                                     num_filters=num_filters * 4,
+                                     filter_size=1,
+                                     stride=1,
+                                     is_vd_mode=False if if_first else True,
+                                     name=name + "_branch1")
+
+        self.shortcut = shortcut
+
+    def forward(self, inputs: paddle.Tensor):
+        y = self.conv0(inputs)
+        conv1 = self.conv1(y)
+        conv2 = self.conv2(conv1)
+
+        if self.shortcut:
+            short = inputs
+        else:
+            short = self.short(inputs)
+        y = paddle.elementwise_add(x=short, y=conv2, act='relu')
+        return y
+
+
+class BasicBlock(nn.Layer):
+    """Basic block for ResNet152_vd."""
+    def __init__(self,
+                 num_channels: int,
+                 num_filters: int,
+                 stride: int,
+                 shortcut: bool = True,
+                 if_first: bool = False,
+                 name: str = None):
+        super(BasicBlock, self).__init__()
+        self.stride = stride
+        self.conv0 = ConvBNLayer(num_channels=num_channels,
+                                 num_filters=num_filters,
+                                 filter_size=3,
+                                 stride=stride,
+                                 act='relu',
+                                 name=name + "_branch2a")
+        self.conv1 = ConvBNLayer(num_channels=num_filters,
+                                 num_filters=num_filters,
+                                 filter_size=3,
+                                 act=None,
+                                 name=name + "_branch2b")
+
+        if not shortcut:
+            self.short = ConvBNLayer(num_channels=num_channels,
+                                     num_filters=num_filters,
+                                     filter_size=1,
+                                     stride=1,
+                                     is_vd_mode=False if if_first else True,
+                                     name=name + "_branch1")
+
+        self.shortcut = shortcut
+
+    def forward(self, inputs: paddle.Tensor):
+        y = self.conv0(inputs)
+        conv1 = self.conv1(y)
+
+        if self.shortcut:
+            short = inputs
+        else:
+            short = self.short(inputs)
+        y = paddle.elementwise_add(x=short, y=conv1, act='relu')
+        return y
+
+
+@moduleinfo(name="resnet152_vd_imagenet",
+            type="CV/classification",
+            author="paddlepaddle",
+            author_email="",
+            summary="resnet152_vd_imagenet is a classification model, "
+            "this module is trained with Imagenet dataset.",
+            version="1.1.0",
+            meta=ImageClassifierModule)
+class ResNet152_vd(nn.Layer):
+    """ResNet152_vd model."""
+    def __init__(self, class_dim: int = 1000, load_checkpoint: str = None):
+        super(ResNet152_vd, self).__init__()
+
+        self.layers = 152
+
+        depth = [3, 8, 36, 3]
+        num_channels = [64, 256, 512, 1024]
+        num_filters = [64, 128, 256, 512]
+
+        self.conv1_1 = ConvBNLayer(num_channels=3, num_filters=32, filter_size=3, stride=2, act='relu', name="conv1_1")
+        self.conv1_2 = ConvBNLayer(num_channels=32, num_filters=32, filter_size=3, stride=1, act='relu', name="conv1_2")
+        self.conv1_3 = ConvBNLayer(num_channels=32, num_filters=64, filter_size=3, stride=1, act='relu', name="conv1_3")
+        self.pool2d_max = MaxPool2d(kernel_size=3, stride=2, padding=1)
+
+        self.block_list = []
+
+        for block in range(len(depth)):
+            shortcut = False
+            for i in range(depth[block]):
+                if block == 2:
+                    if i == 0:
+                        conv_name = "res" + str(block + 2) + "a"
+                    else:
+                        conv_name = "res" + str(block + 2) + "b" + str(i)
+                else:
+                    conv_name = "res" + str(block + 2) + chr(97 + i)
+
+                bottleneck_block = self.add_sublayer(
+                    'bb_%d_%d' % (block, i),
+                    BottleneckBlock(num_channels=num_channels[block] if i == 0 else num_filters[block] * 4,
+                                    num_filters=num_filters[block],
+                                    stride=2 if i == 0 and block != 0 else 1,
+                                    shortcut=shortcut,
+                                    if_first=block == i == 0,
+                                    name=conv_name))
+                self.block_list.append(bottleneck_block)
+                shortcut = True
+
+        self.pool2d_avg = AdaptiveAvgPool2d(1)
+        self.pool2d_avg_channels = num_channels[-1] * 2
+        stdv = 1.0 / math.sqrt(self.pool2d_avg_channels * 1.0)
+
+        self.out = Linear(self.pool2d_avg_channels,
+                          class_dim,
+                          weight_attr=ParamAttr(initializer=Uniform(-stdv, stdv), name="fc_0.w_0"),
+                          bias_attr=ParamAttr(name="fc_0.b_0"))
+
+        if load_checkpoint is not None:
+            model_dict = paddle.load(load_checkpoint)[0]
+            self.set_dict(model_dict)
+            print("load custom checkpoint success")
+
+        else:
+            checkpoint = os.path.join(self.directory, 'resnet152_vd_imagenet.pdparams')
+            if not os.path.exists(checkpoint):
+                os.system(
+                    'wget https://paddlehub.bj.bcebos.com/dygraph/image_classification/resnet152_vd_imagenet.pdparams -O '
+                    + checkpoint)
+            model_dict = paddle.load(checkpoint)[0]
+            self.set_dict(model_dict)
+            print("load pretrained checkpoint success")
+
+    def forward(self, inputs: paddle.Tensor):
+        y = self.conv1_1(inputs)
+        y = self.conv1_2(y)
+        y = self.conv1_3(y)
+        y = self.pool2d_max(y)
+        for block in self.block_list:
+            y = block(y)
+        y = self.pool2d_avg(y)
+        y = paddle.reshape(y, shape=[-1, self.pool2d_avg_channels])
+        y = self.out(y)
+        return y

hub_module/modules/image/classification/resnet18_imagenet/module.py

+# copyright (c) 2020 PaddlePaddle Authors. All Rights Reserve.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import os
+import math
+
+import numpy as np
+import paddle
+from paddle import ParamAttr
+import paddle.nn as nn
+from paddle.nn import Conv2d, BatchNorm, Linear, Dropout
+from paddle.nn import AdaptiveAvgPool2d, MaxPool2d, AvgPool2d
+from paddle.nn.initializer import Uniform
+from paddlehub.module.module import moduleinfo
+from paddlehub.module.cv_module import ImageClassifierModule
+
+
+class ConvBNLayer(nn.Layer):
+    """Basic conv bn layer."""
+    def __init__(self,
+                 num_channels: int,
+                 num_filters: int,
+                 filter_size: int,
+                 stride: int = 1,
+                 groups: int = 1,
+                 act: str = None,
+                 name: str = None):
+        super(ConvBNLayer, self).__init__()
+
+        self._conv = Conv2d(in_channels=num_channels,
+                            out_channels=num_filters,
+                            kernel_size=filter_size,
+                            stride=stride,
+                            padding=(filter_size - 1) // 2,
+                            groups=groups,
+                            weight_attr=ParamAttr(name=name + "_weights"),
+                            bias_attr=False)
+        if name == "conv1":
+            bn_name = "bn_" + name
+        else:
+            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")
+
+    def forward(self, inputs: paddle.Tensor):
+        y = self._conv(inputs)
+        y = self._batch_norm(y)
+        return y
+
+
+class BottleneckBlock(nn.Layer):
+    """Bottleneck Block for ResNet18."""
+    def __init__(self, num_channels: int, num_filters: int, stride: int, shortcut: bool = True, name: str = None):
+        super(BottleneckBlock, self).__init__()
+
+        self.conv0 = ConvBNLayer(num_channels=num_channels,
+                                 num_filters=num_filters,
+                                 filter_size=1,
+                                 act="relu",
+                                 name=name + "_branch2a")
+        self.conv1 = ConvBNLayer(num_channels=num_filters,
+                                 num_filters=num_filters,
+                                 filter_size=3,
+                                 stride=stride,
+                                 act="relu",
+                                 name=name + "_branch2b")
+        self.conv2 = ConvBNLayer(num_channels=num_filters,
+                                 num_filters=num_filters * 4,
+                                 filter_size=1,
+                                 act=None,
+                                 name=name + "_branch2c")
+
+        if not shortcut:
+            self.short = ConvBNLayer(num_channels=num_channels,
+                                     num_filters=num_filters * 4,
+                                     filter_size=1,
+                                     stride=stride,
+                                     name=name + "_branch1")
+
+        self.shortcut = shortcut
+
+        self._num_channels_out = num_filters * 4
+
+    def forward(self, inputs: paddle.Tensor):
+        y = self.conv0(inputs)
+        conv1 = self.conv1(y)
+        conv2 = self.conv2(conv1)
+
+        if self.shortcut:
+            short = inputs
+        else:
+            short = self.short(inputs)
+
+        y = paddle.elementwise_add(x=short, y=conv2, act="relu")
+        return y
+
+
+class BasicBlock(nn.Layer):
+    """Basic block for ResNet18."""
+    def __init__(self, num_channels: int, num_filters: int, stride: int, shortcut: bool = True, name: str = None):
+        super(BasicBlock, self).__init__()
+        self.stride = stride
+        self.conv0 = ConvBNLayer(num_channels=num_channels,
+                                 num_filters=num_filters,
+                                 filter_size=3,
+                                 stride=stride,
+                                 act="relu",
+                                 name=name + "_branch2a")
+        self.conv1 = ConvBNLayer(num_channels=num_filters,
+                                 num_filters=num_filters,
+                                 filter_size=3,
+                                 act=None,
+                                 name=name + "_branch2b")
+
+        if not shortcut:
+            self.short = ConvBNLayer(num_channels=num_channels,
+                                     num_filters=num_filters,
+                                     filter_size=1,
+                                     stride=stride,
+                                     name=name + "_branch1")
+
+        self.shortcut = shortcut
+
+    def forward(self, inputs: paddle.Tensor):
+        y = self.conv0(inputs)
+        conv1 = self.conv1(y)
+
+        if self.shortcut:
+            short = inputs
+        else:
+            short = self.short(inputs)
+        y = paddle.elementwise_add(x=short, y=conv1, act="relu")
+        return y
+
+
+@moduleinfo(name="resnet18_imagenet",
+            type="CV/classification",
+            author="paddlepaddle",
+            author_email="",
+            summary="resnet18_imagenet is a classification model, "
+            "this module is trained with Baidu open sourced dataset.",
+            version="1.1.0",
+            meta=ImageClassifierModule)
+class ResNet18(nn.Layer):
+    """ResNet18 model."""
+    def __init__(self, class_dim: int = 1000, load_checkpoint: str = None):
+        super(ResNet18, self).__init__()
+
+        self.layers = 18
+        depth = [2, 2, 2, 2]
+        num_channels = [64, 64, 128, 256]
+        num_filters = [64, 128, 256, 512]
+
+        self.conv = ConvBNLayer(num_channels=3, num_filters=64, filter_size=7, stride=2, act="relu", name="conv1")
+        self.pool2d_max = MaxPool2d(kernel_size=3, stride=2, padding=1)
+
+        self.block_list = []
+
+        for block in range(len(depth)):
+            shortcut = False
+            for i in range(depth[block]):
+                conv_name = "res" + str(block + 2) + chr(97 + i)
+                basic_block = self.add_sublayer(
+                    conv_name,
+                    BasicBlock(num_channels=num_channels[block] if i == 0 else num_filters[block],
+                               num_filters=num_filters[block],
+                               stride=2 if i == 0 and block != 0 else 1,
+                               shortcut=shortcut,
+                               name=conv_name))
+                self.block_list.append(basic_block)
+                shortcut = True
+
+        self.pool2d_avg = AdaptiveAvgPool2d(1)
+
+        self.pool2d_avg_channels = num_channels[-1] * 2
+
+        stdv = 1.0 / math.sqrt(self.pool2d_avg_channels * 1.0)
+
+        self.out = Linear(self.pool2d_avg_channels,
+                          class_dim,
+                          weight_attr=ParamAttr(initializer=Uniform(-stdv, stdv), name="fc_0.w_0"),
+                          bias_attr=ParamAttr(name="fc_0.b_0"))
+
+        if load_checkpoint is not None:
+            model_dict = paddle.load(load_checkpoint)[0]
+            self.set_dict(model_dict)
+            print("load custom checkpoint success")
+
+        else:
+            checkpoint = os.path.join(self.directory, 'resnet18_imagenet.pdparams')
+            if not os.path.exists(checkpoint):
+                os.system(
+                    'wget https://paddlehub.bj.bcebos.com/dygraph/image_classification/resnet18_imagenet.pdparams -O ' +
+                    checkpoint)
+            model_dict = paddle.load(checkpoint)[0]
+            self.set_dict(model_dict)
+            print("load pretrained checkpoint success")
+
+    def forward(self, inputs: paddle.Tensor):
+        y = self.conv(inputs)
+        y = self.pool2d_max(y)
+        for block in self.block_list:
+            y = block(y)
+        y = self.pool2d_avg(y)
+        y = paddle.reshape(y, shape=[-1, self.pool2d_avg_channels])
+        y = self.out(y)
+        return y

hub_module/modules/image/classification/resnet18_vd_imagenet/README.md

-## 命令行预测
-
-```
-hub run resnet18_vd_imagenet --input_path "/PATH/TO/IMAGE"
-```
-
-## API
-
-```python
-def get_expected_image_width()
-```
-
-返回预处理的图片宽度，也就是224。
-
-```python
-def get_expected_image_height()
-```
-
-返回预处理的图片高度，也就是224。
-
-```python
-def get_pretrained_images_mean()
-```
-
-返回预处理的图片均值，也就是 \[0.485, 0.456, 0.406\]。
-
-```python
-def get_pretrained_images_std()
-```
-
-返回预处理的图片标准差，也就是 \[0.229, 0.224, 0.225\]。
-
-
-```python
-def context(trainable=True, pretrained=True)
-```
-
-**参数**
-
-* trainable (bool): 计算图的参数是否为可训练的；
-* pretrained (bool): 是否加载默认的预训练模型。
-
-**返回**
-
-* inputs (dict): 计算图的输入，key 为 'image', value 为图片的张量；
-* outputs (dict): 计算图的输出，key 为 'classification' 和 'feature_map'，其相应的值为：
-    * classification (paddle.fluid.framework.Variable): 分类结果，也就是全连接层的输出；
-    * feature\_map (paddle.fluid.framework.Variable): 特征匹配，全连接层前面的那个张量。
-* context\_prog(fluid.Program): 计算图，用于迁移学习。
-
-```python
-def classification(images=None,
-                   paths=None,
-                   batch_size=1,
-                   use_gpu=False,
-                   top_k=1):
-```
-
-**参数**
-
-* images (list\[numpy.ndarray\]): 图片数据，每一个图片数据的shape 均为 \[H, W, C\]，颜色空间为 BGR；
-* paths (list\[str\]): 图片的路径；
-* batch\_size (int): batch 的大小；
-* use\_gpu (bool): 是否使用 GPU 来预测；
-* top\_k (int): 返回预测结果的前 k 个。
-
-**返回**
-
-res (list\[dict\]): 分类结果，列表的每一个元素均为字典，其中 key 为识别动物的类别，value为置信度。
-
-```python
-def save_inference_model(dirname,
-                         model_filename=None,
-                         params_filename=None,
-                         combined=True)
-```
-
-将模型保存到指定路径。
-
-**参数**
-
-* dirname: 存在模型的目录名称
-* model\_filename: 模型文件名称，默认为\_\_model\_\_
-* params\_filename: 参数文件名称，默认为\_\_params\_\_(仅当`combined`为True时生效)
-* combined: 是否将参数保存到统一的一个文件中
-
-## 代码示例
-
-```python
-import paddlehub as hub
-import cv2
-
-classifier = hub.Module(name="resnet18_vd_imagenet")
-
-result = classifier.classification(images=[cv2.imread('/PATH/TO/IMAGE')])
-# or
-# result = classifier.classification(paths=['/PATH/TO/IMAGE'])
-```
-
-## 服务部署
-
-PaddleHub Serving可以部署一个在线图像识别服务。
-
-## 第一步：启动PaddleHub Serving
-
-运行启动命令：
-```shell
-$ hub serving start -m resnet18_vd_imagenet
-```
-
-这样就完成了一个在线图像识别服务化API的部署，默认端口号为8866。
-
-**NOTE:** 如使用GPU预测，则需要在启动服务之前，请设置CUDA\_VISIBLE\_DEVICES环境变量，否则不用设置。
-
-## 第二步：发送预测请求
-
-配置好服务端，以下数行代码即可实现发送预测请求，获取预测结果
-
-```python
-import requests
-import json
-import cv2
-import base64
-
-
-def cv2_to_base64(image):
-    data = cv2.imencode('.jpg', image)[1]
-    return base64.b64encode(data.tostring()).decode('utf8')
-
-
-# 发送HTTP请求
-data = {'images':[cv2_to_base64(cv2.imread("/PATH/TO/IMAGE"))]}
-headers = {"Content-type": "application/json"}
-url = "http://127.0.0.1:8866/predict/resnet18_vd_imagenet"
-r = requests.post(url=url, headers=headers, data=json.dumps(data))
-
-# 打印预测结果
-print(r.json()["results"])
-```
-
-### 查看代码
-
-https://github.com/PaddlePaddle/PaddleClas
-
-### 依赖
-
-paddlepaddle >= 1.6.2
-
-paddlehub >= 1.6.0

hub_module/modules/image/classification/resnet18_vd_imagenet/data_feed.py

-# coding=utf-8
-import os
-import time
-from collections import OrderedDict
-
-import cv2
-import numpy as np
-from PIL import Image
-
-__all__ = ['reader']
-
-DATA_DIM = 224
-img_mean = np.array([0.485, 0.456, 0.406]).reshape((3, 1, 1))
-img_std = np.array([0.229, 0.224, 0.225]).reshape((3, 1, 1))
-
-
-def resize_short(img, target_size):
-    percent = float(target_size) / min(img.size[0], img.size[1])
-    resized_width = int(round(img.size[0] * percent))
-    resized_height = int(round(img.size[1] * percent))
-    img = img.resize((resized_width, resized_height), Image.LANCZOS)
-    return img
-
-
-def crop_image(img, target_size, center):
-    width, height = img.size
-    size = target_size
-    if center == True:
-        w_start = (width - size) / 2
-        h_start = (height - size) / 2
-    else:
-        w_start = np.random.randint(0, width - size + 1)
-        h_start = np.random.randint(0, height - size + 1)
-    w_end = w_start + size
-    h_end = h_start + size
-    img = img.crop((w_start, h_start, w_end, h_end))
-    return img
-
-
-def process_image(img):
-    img = resize_short(img, target_size=256)
-    img = crop_image(img, target_size=DATA_DIM, center=True)
-    if img.mode != 'RGB':
-        img = img.convert('RGB')
-    img = np.array(img).astype('float32').transpose((2, 0, 1)) / 255
-    img -= img_mean
-    img /= img_std
-    return img
-
-
-def reader(images=None, paths=None):
-    """
-    Preprocess to yield image.
-
-    Args:
-        images (list[numpy.ndarray]): images data, shape of each is [H, W, C].
-        paths (list[str]): paths to images.
-
-    Yield:
-        each (collections.OrderedDict): info of original image, preprocessed image.
-    """
-    component = list()
-    if paths:
-        for im_path in paths:
-            each = OrderedDict()
-            assert os.path.isfile(
-                im_path), "The {} isn't a valid file path.".format(im_path)
-            each['org_im_path'] = im_path
-            each['org_im'] = Image.open(im_path)
-            each['org_im_width'], each['org_im_height'] = each['org_im'].size
-            component.append(each)
-    if images is not None:
-        assert type(images), "images is a list."
-        for im in images:
-            each = OrderedDict()
-            each['org_im'] = Image.fromarray(im[:, :, ::-1])
-            each['org_im_path'] = 'ndarray_time={}'.format(
-                round(time.time(), 6) * 1e6)
-            each['org_im_width'], each['org_im_height'] = each['org_im'].size
-            component.append(each)
-
-    for element in component:
-        element['image'] = process_image(element['org_im'])
-        yield element

hub_module/modules/image/classification/resnet18_vd_imagenet/module.py

-# coding=utf-8
-from __future__ import absolute_import
-from __future__ import division
-
-import ast
-import argparse
+# copyright (c) 2020 PaddlePaddle Authors. All Rights Reserve.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 import os
+import math
 
 import numpy as np
-import paddle.fluid as fluid
-import paddlehub as hub
-from paddle.fluid.core import PaddleTensor, AnalysisConfig, create_paddle_predictor
-from paddlehub.module.module import moduleinfo, runnable, serving
-from paddlehub.common.paddle_helper import add_vars_prefix
-
-from resnet18_vd_imagenet.processor import postprocess, base64_to_cv2
-from resnet18_vd_imagenet.data_feed import reader
-from resnet18_vd_imagenet.resnet_vd import ResNet18_vd
+import paddle
+from paddle import ParamAttr
+import paddle.nn as nn
+from paddle.nn import Conv2d, BatchNorm, Linear, Dropout
+from paddle.nn import AdaptiveAvgPool2d, MaxPool2d, AvgPool2d
+from paddle.nn.initializer import Uniform
+from paddlehub.module.module import moduleinfo
+from paddlehub.module.cv_module import ImageClassifierModule
+
+
+class ConvBNLayer(nn.Layer):
+    """Basic conv bn layer."""
+    def __init__(
+        self,
+        num_channels: int,
+        num_filters: int,
+        filter_size: int,
+        stride: int = 1,
+        groups: int = 1,
+        is_vd_mode: bool = False,
+        act: str = None,
+        name: str = None,
+    ):
+        super(ConvBNLayer, self).__init__()
+
+        self.is_vd_mode = is_vd_mode
+        self._pool2d_avg = AvgPool2d(kernel_size=2, stride=2, padding=0, ceil_mode=True)
+        self._conv = Conv2d(in_channels=num_channels,
+                            out_channels=num_filters,
+                            kernel_size=filter_size,
+                            stride=stride,
+                            padding=(filter_size - 1) // 2,
+                            groups=groups,
+                            weight_attr=ParamAttr(name=name + "_weights"),
+                            bias_attr=False)
+        if name == "conv1":
+            bn_name = "bn_" + name
+        else:
+            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')
+
+    def forward(self, inputs: paddle.Tensor):
+        if self.is_vd_mode:
+            inputs = self._pool2d_avg(inputs)
+        y = self._conv(inputs)
+        y = self._batch_norm(y)
+        return y
+
+
+class BottleneckBlock(nn.Layer):
+    """Bottleneck Block for ResNet18_vd."""
+    def __init__(self,
+                 num_channels: int,
+                 num_filters: int,
+                 stride: int,
+                 shortcut: bool = True,
+                 if_first: bool = False,
+                 name: str = None):
+        super(BottleneckBlock, self).__init__()
+
+        self.conv0 = ConvBNLayer(num_channels=num_channels,
+                                 num_filters=num_filters,
+                                 filter_size=1,
+                                 act='relu',
+                                 name=name + "_branch2a")
+        self.conv1 = ConvBNLayer(num_channels=num_filters,
+                                 num_filters=num_filters,
+                                 filter_size=3,
+                                 stride=stride,
+                                 act='relu',
+                                 name=name + "_branch2b")
+        self.conv2 = ConvBNLayer(num_channels=num_filters,
+                                 num_filters=num_filters * 4,
+                                 filter_size=1,
+                                 act=None,
+                                 name=name + "_branch2c")
+
+        if not shortcut:
+            self.short = ConvBNLayer(num_channels=num_channels,
+                                     num_filters=num_filters * 4,
+                                     filter_size=1,
+                                     stride=1,
+                                     is_vd_mode=False if if_first else True,
+                                     name=name + "_branch1")
+
+        self.shortcut = shortcut
+
+    def forward(self, inputs: paddle.Tensor):
+        y = self.conv0(inputs)
+        conv1 = self.conv1(y)
+        conv2 = self.conv2(conv1)
+
+        if self.shortcut:
+            short = inputs
+        else:
+            short = self.short(inputs)
+        y = paddle.elementwise_add(x=short, y=conv2, act='relu')
+        return y
+
+
+class BasicBlock(nn.Layer):
+    """Basic block for ResNet18_vd."""
+    def __init__(self,
+                 num_channels: int,
+                 num_filters: int,
+                 stride: int,
+                 shortcut: bool = True,
+                 if_first: bool = False,
+                 name: str = None):
+        super(BasicBlock, self).__init__()
+        self.stride = stride
+        self.conv0 = ConvBNLayer(num_channels=num_channels,
+                                 num_filters=num_filters,
+                                 filter_size=3,
+                                 stride=stride,
+                                 act='relu',
+                                 name=name + "_branch2a")
+        self.conv1 = ConvBNLayer(num_channels=num_filters,
+                                 num_filters=num_filters,
+                                 filter_size=3,
+                                 act=None,
+                                 name=name + "_branch2b")
+
+        if not shortcut:
+            self.short = ConvBNLayer(num_channels=num_channels,
+                                     num_filters=num_filters,
+                                     filter_size=1,
+                                     stride=1,
+                                     is_vd_mode=False if if_first else True,
+                                     name=name + "_branch1")
+
+        self.shortcut = shortcut
+
+    def forward(self, inputs: paddle.Tensor):
+        y = self.conv0(inputs)
+        conv1 = self.conv1(y)
+
+        if self.shortcut:
+            short = inputs
+        else:
+            short = self.short(inputs)
+        y = paddle.elementwise_add(x=short, y=conv1, act='relu')
+        return y
 
 
-@moduleinfo(
-    name="resnet18_vd_imagenet",
-    type="CV/image_classification",
+@moduleinfo(name="resnet18_vd_imagenet",
+            type="CV/classification",
             author="paddlepaddle",
-    author_email="paddle-dev@baidu.com",
-    summary=
-    "ResNet18vd is a image classfication model, this module is trained with imagenet datasets.",
-    version="1.0.0")
-class ResNet18vdImageNet(hub.Module):
-    def _initialize(self):
-        self.default_pretrained_model_path = os.path.join(
-            self.directory, "resnet18_vd_imagenet_model")
-        label_file = os.path.join(self.directory, "label_list.txt")
-        with open(label_file, 'r', encoding='utf-8') as file:
-            self.label_list = file.read().split("\n")[:-1]
-        self.predictor_set = False
-
-    def get_expected_image_width(self):
-        return 224
-
-    def get_expected_image_height(self):
-        return 224
-
-    def get_pretrained_images_mean(self):
-        im_mean = np.array([0.485, 0.456, 0.406]).reshape(1, 3)
-        return im_mean
-
-    def get_pretrained_images_std(self):
-        im_std = np.array([0.229, 0.224, 0.225]).reshape(1, 3)
-        return im_std
-
-    def _set_config(self):
-        """
-        predictor config setting
-        """
-        cpu_config = AnalysisConfig(self.default_pretrained_model_path)
-        cpu_config.disable_glog_info()
-        cpu_config.disable_gpu()
-        self.cpu_predictor = create_paddle_predictor(cpu_config)
-
-        try:
-            _places = os.environ["CUDA_VISIBLE_DEVICES"]
-            int(_places[0])
-            use_gpu = True
-        except:
-            use_gpu = False
-        if use_gpu:
-            gpu_config = AnalysisConfig(self.default_pretrained_model_path)
-            gpu_config.disable_glog_info()
-            gpu_config.enable_use_gpu(
-                memory_pool_init_size_mb=1000, device_id=0)
-            self.gpu_predictor = create_paddle_predictor(gpu_config)
-
-    def context(self, trainable=True, pretrained=True):
-        """context for transfer learning.
-
-        Args:
-            trainable (bool): Set parameters in program to be trainable.
-            pretrained (bool) : Whether to load pretrained model.
-
-        Returns:
-            inputs (dict): key is 'image', corresponding vaule is image tensor.
-            outputs (dict): key is :
-                'classification', corresponding value is the result of classification.
-                'feature_map', corresponding value is the result of the layer before the fully connected layer.
-            context_prog (fluid.Program): program for transfer learning.
-        """
-        context_prog = fluid.Program()
-        startup_prog = fluid.Program()
-        with fluid.program_guard(context_prog, startup_prog):
-            with fluid.unique_name.guard():
-                image = fluid.layers.data(
-                    name="image", shape=[3, 224, 224], dtype="float32")
-                resnet_vd = ResNet18_vd()
-                output, feature_map = resnet_vd.net(
-                    input=image, class_dim=len(self.label_list))
-
-                name_prefix = '@HUB_{}@'.format(self.name)
-                inputs = {'image': name_prefix + image.name}
-                outputs = {
-                    'classification': name_prefix + output.name,
-                    'feature_map': name_prefix + feature_map.name
-                }
-                add_vars_prefix(context_prog, name_prefix)
-                add_vars_prefix(startup_prog, name_prefix)
-                global_vars = context_prog.global_block().vars
-                inputs = {
-                    key: global_vars[value]
-                    for key, value in inputs.items()
-                }
-                outputs = {
-                    key: global_vars[value]
-                    for key, value in outputs.items()
-                }
-
-                place = fluid.CPUPlace()
-                exe = fluid.Executor(place)
-                # pretrained
-                if pretrained:
+            author_email="",
+            summary="resnet18_vd_imagenet is a classification model, "
+            "this module is trained with Baidu open sourced dataset.",
+            version="1.1.0",
+            meta=ImageClassifierModule)
+class ResNet18_vd(nn.Layer):
+    """ResNet18_vd model."""
+    def __init__(self, class_dim: int = 1000, load_checkpoint: str = None):
+        super(ResNet18_vd, self).__init__()
+
+        self.layers = 18
+        depth = [2, 2, 2, 2]
+        num_channels = [64, 64, 128, 256]
+        num_filters = [64, 128, 256, 512]
+
+        self.conv1_1 = ConvBNLayer(num_channels=3, num_filters=32, filter_size=3, stride=2, act='relu', name="conv1_1")
+        self.conv1_2 = ConvBNLayer(num_channels=32, num_filters=32, filter_size=3, stride=1, act='relu', name="conv1_2")
+        self.conv1_3 = ConvBNLayer(num_channels=32, num_filters=64, filter_size=3, stride=1, act='relu', name="conv1_3")
+        self.pool2d_max = MaxPool2d(kernel_size=3, stride=2, padding=1)
+
+        self.block_list = []
+
+        for block in range(len(depth)):
+            shortcut = False
+            for i in range(depth[block]):
+                conv_name = "res" + str(block + 2) + chr(97 + i)
+                basic_block = self.add_sublayer(
+                    'bb_%d_%d' % (block, i),
+                    BasicBlock(num_channels=num_channels[block] if i == 0 else num_filters[block],
+                               num_filters=num_filters[block],
+                               stride=2 if i == 0 and block != 0 else 1,
+                               shortcut=shortcut,
+                               if_first=block == i == 0,
+                               name=conv_name))
+                self.block_list.append(basic_block)
+                shortcut = True
+
+        self.pool2d_avg = AdaptiveAvgPool2d(1)
+        self.pool2d_avg_channels = num_channels[-1] * 2
+        stdv = 1.0 / math.sqrt(self.pool2d_avg_channels * 1.0)
+
+        self.out = Linear(self.pool2d_avg_channels,
+                          class_dim,
+                          weight_attr=ParamAttr(initializer=Uniform(-stdv, stdv), name="fc_0.w_0"),
+                          bias_attr=ParamAttr(name="fc_0.b_0"))
+
+        if load_checkpoint is not None:
+            model_dict = paddle.load(load_checkpoint)[0]
+            self.set_dict(model_dict)
+            print("load custom checkpoint success")
 
-                    def _if_exist(var):
-                        b = os.path.exists(
-                            os.path.join(self.default_pretrained_model_path,
-                                         var.name))
-                        return b
-
-                    fluid.io.load_vars(
-                        exe,
-                        self.default_pretrained_model_path,
-                        context_prog,
-                        predicate=_if_exist)
         else:
-                    exe.run(startup_prog)
-                # trainable
-                for param in context_prog.global_block().iter_parameters():
-                    param.trainable = trainable
-        return inputs, outputs, context_prog
-
-    def classification(self,
-                       images=None,
-                       paths=None,
-                       batch_size=1,
-                       use_gpu=False,
-                       top_k=1):
-        """
-        API for image classification.
-
-        Args:
-            images (list[numpy.ndarray]): data of images, shape of each is [H, W, C], color space must be BGR.
-            paths (list[str]): The paths of images.
-            batch_size (int): batch size.
-            use_gpu (bool): Whether to use gpu.
-            top_k (int): Return top k results.
-
-        Returns:
-            res (list[dict]): The classfication results.
-        """
-        if use_gpu:
-            try:
-                _places = os.environ["CUDA_VISIBLE_DEVICES"]
-                int(_places[0])
-            except:
-                raise RuntimeError(
-                    "Environment Variable CUDA_VISIBLE_DEVICES is not set correctly. If you wanna use gpu, please set CUDA_VISIBLE_DEVICES as cuda_device_id."
-                )
-
-        if not self.predictor_set:
-            self._set_config()
-            self.predictor_set = True
-
-        all_data = list()
-        for yield_data in reader(images, paths):
-            all_data.append(yield_data)
-
-        total_num = len(all_data)
-        loop_num = int(np.ceil(total_num / batch_size))
-
-        res = list()
-        for iter_id in range(loop_num):
-            batch_data = list()
-            handle_id = iter_id * batch_size
-            for image_id in range(batch_size):
-                try:
-                    batch_data.append(all_data[handle_id + image_id])
-                except:
-                    pass
-            # feed batch image
-            batch_image = np.array([data['image'] for data in batch_data])
-            batch_image = PaddleTensor(batch_image.copy())
-            predictor_output = self.gpu_predictor.run([
-                batch_image
-            ]) if use_gpu else self.cpu_predictor.run([batch_image])
-            out = postprocess(
-                data_out=predictor_output[0].as_ndarray(),
-                label_list=self.label_list,
-                top_k=top_k)
-            res += out
-        return res
-
-    def save_inference_model(self,
-                             dirname,
-                             model_filename=None,
-                             params_filename=None,
-                             combined=True):
-        if combined:
-            model_filename = "__model__" if not model_filename else model_filename
-            params_filename = "__params__" if not params_filename else params_filename
-        place = fluid.CPUPlace()
-        exe = fluid.Executor(place)
-
-        program, feeded_var_names, target_vars = fluid.io.load_inference_model(
-            dirname=self.default_pretrained_model_path, executor=exe)
-
-        fluid.io.save_inference_model(
-            dirname=dirname,
-            main_program=program,
-            executor=exe,
-            feeded_var_names=feeded_var_names,
-            target_vars=target_vars,
-            model_filename=model_filename,
-            params_filename=params_filename)
-
-    @serving
-    def serving_method(self, images, **kwargs):
-        """
-        Run as a service.
-        """
-        images_decode = [base64_to_cv2(image) for image in images]
-        results = self.classification(images=images_decode, **kwargs)
-        return results
-
-    @runnable
-    def run_cmd(self, argvs):
-        """
-        Run as a command.
-        """
-        self.parser = argparse.ArgumentParser(
-            description="Run the {} module.".format(self.name),
-            prog='hub run {}'.format(self.name),
-            usage='%(prog)s',
-            add_help=True)
-        self.arg_input_group = self.parser.add_argument_group(
-            title="Input options", description="Input data. Required")
-        self.arg_config_group = self.parser.add_argument_group(
-            title="Config options",
-            description=
-            "Run configuration for controlling module behavior, not required.")
-        self.add_module_config_arg()
-        self.add_module_input_arg()
-        args = self.parser.parse_args(argvs)
-        results = self.classification(
-            paths=[args.input_path],
-            batch_size=args.batch_size,
-            use_gpu=args.use_gpu)
-        return results
-
-    def add_module_config_arg(self):
-        """
-        Add the command config options.
-        """
-        self.arg_config_group.add_argument(
-            '--use_gpu',
-            type=ast.literal_eval,
-            default=False,
-            help="whether use GPU or not.")
-        self.arg_config_group.add_argument(
-            '--batch_size',
-            type=ast.literal_eval,
-            default=1,
-            help="batch size.")
-        self.arg_config_group.add_argument(
-            '--top_k',
-            type=ast.literal_eval,
-            default=1,
-            help="Return top k results.")
-
-    def add_module_input_arg(self):
-        """
-        Add the command input options.
-        """
-        self.arg_input_group.add_argument(
-            '--input_path', type=str, help="path to image.")
+            checkpoint = os.path.join(self.directory, 'resnet18_vd_imagenet.pdparams')
+            if not os.path.exists(checkpoint):
+                os.system(
+                    'wget https://paddlehub.bj.bcebos.com/dygraph/image_classification/resnet18_vd_imagenet.pdparams -O '
+                    + checkpoint)
+            model_dict = paddle.load(checkpoint)[0]
+            self.set_dict(model_dict)
+            print("load pretrained checkpoint success")
+
+    def forward(self, inputs: paddle.Tensor):
+        y = self.conv1_1(inputs)
+        y = self.conv1_2(y)
+        y = self.conv1_3(y)
+        y = self.pool2d_max(y)
+        for block in self.block_list:
+            y = block(y)
+        y = self.pool2d_avg(y)
+        y = paddle.reshape(y, shape=[-1, self.pool2d_avg_channels])
+        y = self.out(y)
+        return y

hub_module/modules/image/classification/resnet18_vd_imagenet/processor.py

-# coding=utf-8
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-
-import base64
-import cv2
-import os
-
-import numpy as np
-
-
-def base64_to_cv2(b64str):
-    data = base64.b64decode(b64str.encode('utf8'))
-    data = np.fromstring(data, np.uint8)
-    data = cv2.imdecode(data, cv2.IMREAD_COLOR)
-    return data
-
-
-def softmax(x):
-    orig_shape = x.shape
-    if len(x.shape) > 1:
-        tmp = np.max(x, axis=1)
-        x -= tmp.reshape((x.shape[0], 1))
-        x = np.exp(x)
-        tmp = np.sum(x, axis=1)
-        x /= tmp.reshape((x.shape[0], 1))
-    else:
-        tmp = np.max(x)
-        x -= tmp
-        x = np.exp(x)
-        tmp = np.sum(x)
-        x /= tmp
-    return x
-
-
-def postprocess(data_out, label_list, top_k):
-    """
-    Postprocess output of network, one image at a time.
-
-    Args:
-        data_out (numpy.ndarray): output data of network.
-        label_list (list): list of label.
-        top_k (int): Return top k results.
-    """
-    output = []
-    for result in data_out:
-        result_i = softmax(result)
-        output_i = {}
-        indexs = np.argsort(result_i)[::-1][0:top_k]
-        for index in indexs:
-            label = label_list[index].split(',')[0]
-            output_i[label] = float(result_i[index])
-        output.append(output_i)
-    return output

hub_module/modules/image/classification/resnet18_vd_imagenet/resnet_vd.py

-#copyright (c) 2019 PaddlePaddle Authors. All Rights Reserve.
-#
-#Licensed under the Apache License, Version 2.0 (the "License");
-#you may not use this file except in compliance with the License.
-#You may obtain a copy of the License at
-#
-#    http://www.apache.org/licenses/LICENSE-2.0
-#
-#Unless required by applicable law or agreed to in writing, software
-#distributed under the License is distributed on an "AS IS" BASIS,
-#WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-#See the License for the specific language governing permissions and
-#limitations under the License.
-
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-
-import math
-
-import paddle
-import paddle.fluid as fluid
-from paddle.fluid.param_attr import ParamAttr
-
-__all__ = [
-    "ResNet", "ResNet18_vd", "ResNet34_vd", "ResNet50_vd", "ResNet101_vd",
-    "ResNet152_vd", "ResNet200_vd"
-]
-
-
-class ResNet():
-    def __init__(self, layers=50, is_3x3=False):
-        self.layers = layers
-        self.is_3x3 = is_3x3
-
-    def net(self, input, class_dim=1000):
-        is_3x3 = self.is_3x3
-        layers = self.layers
-        supported_layers = [18, 34, 50, 101, 152, 200]
-        assert layers in supported_layers, \
-            "supported layers are {} but input layer is {}".format(supported_layers, layers)
-
-        if layers == 18:
-            depth = [2, 2, 2, 2]
-        elif layers == 34 or layers == 50:
-            depth = [3, 4, 6, 3]
-        elif layers == 101:
-            depth = [3, 4, 23, 3]
-        elif layers == 152:
-            depth = [3, 8, 36, 3]
-        elif layers == 200:
-            depth = [3, 12, 48, 3]
-        num_filters = [64, 128, 256, 512]
-        if is_3x3 == False:
-            conv = self.conv_bn_layer(
-                input=input,
-                num_filters=64,
-                filter_size=7,
-                stride=2,
-                act='relu')
-        else:
-            conv = self.conv_bn_layer(
-                input=input,
-                num_filters=32,
-                filter_size=3,
-                stride=2,
-                act='relu',
-                name='conv1_1')
-            conv = self.conv_bn_layer(
-                input=conv,
-                num_filters=32,
-                filter_size=3,
-                stride=1,
-                act='relu',
-                name='conv1_2')
-            conv = self.conv_bn_layer(
-                input=conv,
-                num_filters=64,
-                filter_size=3,
-                stride=1,
-                act='relu',
-                name='conv1_3')
-
-        conv = fluid.layers.pool2d(
-            input=conv,
-            pool_size=3,
-            pool_stride=2,
-            pool_padding=1,
-            pool_type='max')
-
-        if layers >= 50:
-            for block in range(len(depth)):
-                for i in range(depth[block]):
-                    if layers in [101, 152, 200] and block == 2:
-                        if i == 0:
-                            conv_name = "res" + str(block + 2) + "a"
-                        else:
-                            conv_name = "res" + str(block + 2) + "b" + str(i)
-                    else:
-                        conv_name = "res" + str(block + 2) + chr(97 + i)
-                    conv = self.bottleneck_block(
-                        input=conv,
-                        num_filters=num_filters[block],
-                        stride=2 if i == 0 and block != 0 else 1,
-                        if_first=block == i == 0,
-                        name=conv_name)
-        else:
-            for block in range(len(depth)):
-                for i in range(depth[block]):
-                    conv_name = "res" + str(block + 2) + chr(97 + i)
-                    conv = self.basic_block(
-                        input=conv,
-                        num_filters=num_filters[block],
-                        stride=2 if i == 0 and block != 0 else 1,
-                        if_first=block == i == 0,
-                        name=conv_name)
-
-        pool = fluid.layers.pool2d(
-            input=conv, pool_type='avg', global_pooling=True)
-        stdv = 1.0 / math.sqrt(pool.shape[1] * 1.0)
-
-        out = fluid.layers.fc(
-            input=pool,
-            size=class_dim,
-            param_attr=fluid.param_attr.ParamAttr(
-                initializer=fluid.initializer.Uniform(-stdv, stdv)))
-
-        return out, pool
-
-    def conv_bn_layer(self,
-                      input,
-                      num_filters,
-                      filter_size,
-                      stride=1,
-                      groups=1,
-                      act=None,
-                      name=None):
-        conv = fluid.layers.conv2d(
-            input=input,
-            num_filters=num_filters,
-            filter_size=filter_size,
-            stride=stride,
-            padding=(filter_size - 1) // 2,
-            groups=groups,
-            act=None,
-            param_attr=ParamAttr(name=name + "_weights"),
-            bias_attr=False)
-        if name == "conv1":
-            bn_name = "bn_" + name
-        else:
-            bn_name = "bn" + name[3:]
-        return fluid.layers.batch_norm(
-            input=conv,
-            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')
-
-    def conv_bn_layer_new(self,
-                          input,
-                          num_filters,
-                          filter_size,
-                          stride=1,
-                          groups=1,
-                          act=None,
-                          name=None):
-        pool = fluid.layers.pool2d(
-            input=input,
-            pool_size=2,
-            pool_stride=2,
-            pool_padding=0,
-            pool_type='avg',
-            ceil_mode=True)
-
-        conv = fluid.layers.conv2d(
-            input=pool,
-            num_filters=num_filters,
-            filter_size=filter_size,
-            stride=1,
-            padding=(filter_size - 1) // 2,
-            groups=groups,
-            act=None,
-            param_attr=ParamAttr(name=name + "_weights"),
-            bias_attr=False)
-        if name == "conv1":
-            bn_name = "bn_" + name
-        else:
-            bn_name = "bn" + name[3:]
-        return fluid.layers.batch_norm(
-            input=conv,
-            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')
-
-    def shortcut(self, input, ch_out, stride, name, if_first=False):
-        ch_in = input.shape[1]
-        if ch_in != ch_out or stride != 1:
-            if if_first:
-                return self.conv_bn_layer(input, ch_out, 1, stride, name=name)
-            else:
-                return self.conv_bn_layer_new(
-                    input, ch_out, 1, stride, name=name)
-        elif if_first:
-            return self.conv_bn_layer(input, ch_out, 1, stride, name=name)
-        else:
-            return input
-
-    def bottleneck_block(self, input, num_filters, stride, name, if_first):
-        conv0 = self.conv_bn_layer(
-            input=input,
-            num_filters=num_filters,
-            filter_size=1,
-            act='relu',
-            name=name + "_branch2a")
-        conv1 = self.conv_bn_layer(
-            input=conv0,
-            num_filters=num_filters,
-            filter_size=3,
-            stride=stride,
-            act='relu',
-            name=name + "_branch2b")
-        conv2 = self.conv_bn_layer(
-            input=conv1,
-            num_filters=num_filters * 4,
-            filter_size=1,
-            act=None,
-            name=name + "_branch2c")
-
-        short = self.shortcut(
-            input,
-            num_filters * 4,
-            stride,
-            if_first=if_first,
-            name=name + "_branch1")
-
-        return fluid.layers.elementwise_add(x=short, y=conv2, act='relu')
-
-    def basic_block(self, input, num_filters, stride, name, if_first):
-        conv0 = self.conv_bn_layer(
-            input=input,
-            num_filters=num_filters,
-            filter_size=3,
-            act='relu',
-            stride=stride,
-            name=name + "_branch2a")
-        conv1 = self.conv_bn_layer(
-            input=conv0,
-            num_filters=num_filters,
-            filter_size=3,
-            act=None,
-            name=name + "_branch2b")
-        short = self.shortcut(
-            input,
-            num_filters,
-            stride,
-            if_first=if_first,
-            name=name + "_branch1")
-        return fluid.layers.elementwise_add(x=short, y=conv1, act='relu')
-
-
-def ResNet18_vd():
-    model = ResNet(layers=18, is_3x3=True)
-    return model
-
-
-def ResNet34_vd():
-    model = ResNet(layers=34, is_3x3=True)
-    return model
-
-
-def ResNet50_vd():
-    model = ResNet(layers=50, is_3x3=True)
-    return model
-
-
-def ResNet101_vd():
-    model = ResNet(layers=101, is_3x3=True)
-    return model
-
-
-def ResNet152_vd():
-    model = ResNet(layers=152, is_3x3=True)
-    return model
-
-
-def ResNet200_vd():
-    model = ResNet(layers=200, is_3x3=True)
-    return model

hub_module/modules/image/classification/resnet200_vd_imagenet/module.py

+# copyright (c) 2020 PaddlePaddle Authors. All Rights Reserve.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+import os
+import math
+
+import numpy as np
+import paddle
+from paddle import ParamAttr
+import paddle.nn as nn
+from paddle.nn import Conv2d, BatchNorm, Linear, Dropout
+from paddle.nn import AdaptiveAvgPool2d, MaxPool2d, AvgPool2d
+from paddle.nn.initializer import Uniform
+from paddlehub.module.module import moduleinfo
+from paddlehub.module.cv_module import ImageClassifierModule
+
+
+class ConvBNLayer(nn.Layer):
+    """Basic conv bn layer."""
+    def __init__(
+        self,
+        num_channels: int,
+        num_filters: int,
+        filter_size: int,
+        stride: int = 1,
+        groups: int = 1,
+        is_vd_mode: bool = False,
+        act: str = None,
+        name: str = None,
+    ):
+        super(ConvBNLayer, self).__init__()
+
+        self.is_vd_mode = is_vd_mode
+        self._pool2d_avg = AvgPool2d(kernel_size=2, stride=2, padding=0, ceil_mode=True)
+        self._conv = Conv2d(in_channels=num_channels,
+                            out_channels=num_filters,
+                            kernel_size=filter_size,
+                            stride=stride,
+                            padding=(filter_size - 1) // 2,
+                            groups=groups,
+                            weight_attr=ParamAttr(name=name + "_weights"),
+                            bias_attr=False)
+        if name == "conv1":
+            bn_name = "bn_" + name
+        else:
+            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')
+
+    def forward(self, inputs: paddle.Tensor):
+        if self.is_vd_mode:
+            inputs = self._pool2d_avg(inputs)
+        y = self._conv(inputs)
+        y = self._batch_norm(y)
+        return y
+
+
+class BottleneckBlock(nn.Layer):
+    """Bottleneck Block for ResNet200_vd."""
+    def __init__(self,
+                 num_channels: int,
+                 num_filters: int,
+                 stride: int,
+                 shortcut: bool = True,
+                 if_first: bool = False,
+                 name: str = None):
+        super(BottleneckBlock, self).__init__()
+
+        self.conv0 = ConvBNLayer(num_channels=num_channels,
+                                 num_filters=num_filters,
+                                 filter_size=1,
+                                 act='relu',
+                                 name=name + "_branch2a")
+        self.conv1 = ConvBNLayer(num_channels=num_filters,
+                                 num_filters=num_filters,
+                                 filter_size=3,
+                                 stride=stride,
+                                 act='relu',
+                                 name=name + "_branch2b")
+        self.conv2 = ConvBNLayer(num_channels=num_filters,
+                                 num_filters=num_filters * 4,
+                                 filter_size=1,
+                                 act=None,
+                                 name=name + "_branch2c")
+
+        if not shortcut:
+            self.short = ConvBNLayer(num_channels=num_channels,
+                                     num_filters=num_filters * 4,
+                                     filter_size=1,
+                                     stride=1,
+                                     is_vd_mode=False if if_first else True,
+                                     name=name + "_branch1")
+
+        self.shortcut = shortcut
+
+    def forward(self, inputs: paddle.Tensor):
+        y = self.conv0(inputs)
+        conv1 = self.conv1(y)
+        conv2 = self.conv2(conv1)
+
+        if self.shortcut:
+            short = inputs
+        else:
+            short = self.short(inputs)
+        y = paddle.elementwise_add(x=short, y=conv2, act='relu')
+        return y
+
+
+class BasicBlock(nn.Layer):
+    """Basic block for ResNet200_vd."""
+    def __init__(self,
+                 num_channels: int,
+                 num_filters: int,
+                 stride: int,
+                 shortcut: bool = True,
+                 if_first: bool = False,
+                 name: str = None):
+        super(BasicBlock, self).__init__()
+        self.stride = stride
+        self.conv0 = ConvBNLayer(num_channels=num_channels,
+                                 num_filters=num_filters,
+                                 filter_size=3,
+                                 stride=stride,
+                                 act='relu',
+                                 name=name + "_branch2a")
+        self.conv1 = ConvBNLayer(num_channels=num_filters,
+                                 num_filters=num_filters,
+                                 filter_size=3,
+                                 act=None,
+                                 name=name + "_branch2b")
+
+        if not shortcut:
+            self.short = ConvBNLayer(num_channels=num_channels,
+                                     num_filters=num_filters,
+                                     filter_size=1,
+                                     stride=1,
+                                     is_vd_mode=False if if_first else True,
+                                     name=name + "_branch1")
+
+        self.shortcut = shortcut
+
+    def forward(self, inputs: paddle.Tensor):
+        y = self.conv0(inputs)
+        conv1 = self.conv1(y)
+
+        if self.shortcut:
+            short = inputs
+        else:
+            short = self.short(inputs)
+        y = paddle.elementwise_add(x=short, y=conv1, act='relu')
+        return y
+
+
+@moduleinfo(name="resnet200_vd_imagenet",
+            type="CV/classification",
+            author="paddlepaddle",
+            author_email="",
+            summary="resnet200_vd_imagenet is a classification model, "
+            "this module is trained with Imagenet dataset.",
+            version="1.1.0",
+            meta=ImageClassifierModule)
+class ResNet200_vd(nn.Layer):
+    """ResNet200_vd model."""
+    def __init__(self, class_dim: int = 1000, load_checkpoint: str = None):
+        super(ResNet200_vd, self).__init__()
+
+        self.layers = 200
+
+        depth = [3, 12, 48, 3]
+        num_channels = [64, 256, 512, 1024]
+        num_filters = [64, 128, 256, 512]
+
+        self.conv1_1 = ConvBNLayer(num_channels=3, num_filters=32, filter_size=3, stride=2, act='relu', name="conv1_1")
+        self.conv1_2 = ConvBNLayer(num_channels=32, num_filters=32, filter_size=3, stride=1, act='relu', name="conv1_2")
+        self.conv1_3 = ConvBNLayer(num_channels=32, num_filters=64, filter_size=3, stride=1, act='relu', name="conv1_3")
+        self.pool2d_max = MaxPool2d(kernel_size=3, stride=2, padding=1)
+
+        self.block_list = []
+
+        for block in range(len(depth)):
+            shortcut = False
+            for i in range(depth[block]):
+                if block == 2:
+                    if i == 0:
+                        conv_name = "res" + str(block + 2) + "a"
+                    else:
+                        conv_name = "res" + str(block + 2) + "b" + str(i)
+                else:
+                    conv_name = "res" + str(block + 2) + chr(97 + i)
+
+                bottleneck_block = self.add_sublayer(
+                    'bb_%d_%d' % (block, i),
+                    BottleneckBlock(num_channels=num_channels[block] if i == 0 else num_filters[block] * 4,
+                                    num_filters=num_filters[block],
+                                    stride=2 if i == 0 and block != 0 else 1,
+                                    shortcut=shortcut,
+                                    if_first=block == i == 0,
+                                    name=conv_name))
+                self.block_list.append(bottleneck_block)
+                shortcut = True
+
+        self.pool2d_avg = AdaptiveAvgPool2d(1)
+        self.pool2d_avg_channels = num_channels[-1] * 2
+        stdv = 1.0 / math.sqrt(self.pool2d_avg_channels * 1.0)
+
+        self.out = Linear(self.pool2d_avg_channels,
+                          class_dim,
+                          weight_attr=ParamAttr(initializer=Uniform(-stdv, stdv), name="fc_0.w_0"),
+                          bias_attr=ParamAttr(name="fc_0.b_0"))
+
+        if load_checkpoint is not None:
+            model_dict = paddle.load(load_checkpoint)[0]
+            self.set_dict(model_dict)
+            print("load custom checkpoint success")
+
+        else:
+            checkpoint = os.path.join(self.directory, 'resnet200_vd_imagenet.pdparams')
+            if not os.path.exists(checkpoint):
+                os.system(
+                    'wget https://paddlehub.bj.bcebos.com/dygraph/image_classification/resnet200_vd_imagenet.pdparams -O '
+                    + checkpoint)
+            model_dict = paddle.load(checkpoint)[0]
+            self.set_dict(model_dict)
+            print("load pretrained checkpoint success")
+
+    def forward(self, inputs: paddle.Tensor):
+        y = self.conv1_1(inputs)
+        y = self.conv1_2(y)
+        y = self.conv1_3(y)
+        y = self.pool2d_max(y)
+        for block in self.block_list:
+            y = block(y)
+        y = self.pool2d_avg(y)
+        y = paddle.reshape(y, shape=[-1, self.pool2d_avg_channels])
+        y = self.out(y)
+        return y

hub_module/modules/image/classification/resnet34_imagenet/module.py

+# copyright (c) 2020 PaddlePaddle Authors. All Rights Reserve.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import os
+import math
+
+import numpy as np
+import paddle
+from paddle import ParamAttr
+import paddle.nn as nn
+from paddle.nn import Conv2d, BatchNorm, Linear, Dropout
+from paddle.nn import AdaptiveAvgPool2d, MaxPool2d, AvgPool2d
+from paddle.nn.initializer import Uniform
+from paddlehub.module.module import moduleinfo
+from paddlehub.module.cv_module import ImageClassifierModule
+
+
+class ConvBNLayer(nn.Layer):
+    """Basic conv bn layer."""
+    def __init__(self,
+                 num_channels: int,
+                 num_filters: int,
+                 filter_size: int,
+                 stride: int = 1,
+                 groups: int = 1,
+                 act: str = None,
+                 name: str = None):
+        super(ConvBNLayer, self).__init__()
+
+        self._conv = Conv2d(in_channels=num_channels,
+                            out_channels=num_filters,
+                            kernel_size=filter_size,
+                            stride=stride,
+                            padding=(filter_size - 1) // 2,
+                            groups=groups,
+                            weight_attr=ParamAttr(name=name + "_weights"),
+                            bias_attr=False)
+        if name == "conv1":
+            bn_name = "bn_" + name
+        else:
+            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")
+
+    def forward(self, inputs: paddle.Tensor):
+        y = self._conv(inputs)
+        y = self._batch_norm(y)
+        return y
+
+
+class BottleneckBlock(nn.Layer):
+    """Bottleneck Block for ResNet34."""
+    def __init__(self, num_channels: int, num_filters: int, stride: int, shortcut: bool = True, name: str = None):
+        super(BottleneckBlock, self).__init__()
+
+        self.conv0 = ConvBNLayer(num_channels=num_channels,
+                                 num_filters=num_filters,
+                                 filter_size=1,
+                                 act="relu",
+                                 name=name + "_branch2a")
+        self.conv1 = ConvBNLayer(num_channels=num_filters,
+                                 num_filters=num_filters,
+                                 filter_size=3,
+                                 stride=stride,
+                                 act="relu",
+                                 name=name + "_branch2b")
+        self.conv2 = ConvBNLayer(num_channels=num_filters,
+                                 num_filters=num_filters * 4,
+                                 filter_size=1,
+                                 act=None,
+                                 name=name + "_branch2c")
+
+        if not shortcut:
+            self.short = ConvBNLayer(num_channels=num_channels,
+                                     num_filters=num_filters * 4,
+                                     filter_size=1,
+                                     stride=stride,
+                                     name=name + "_branch1")
+
+        self.shortcut = shortcut
+
+        self._num_channels_out = num_filters * 4
+
+    def forward(self, inputs: paddle.Tensor):
+        y = self.conv0(inputs)
+        conv1 = self.conv1(y)
+        conv2 = self.conv2(conv1)
+
+        if self.shortcut:
+            short = inputs
+        else:
+            short = self.short(inputs)
+
+        y = paddle.elementwise_add(x=short, y=conv2, act="relu")
+        return y
+
+
+class BasicBlock(nn.Layer):
+    """Basic block for ResNet34."""
+    def __init__(self, num_channels: int, num_filters: int, stride: int, shortcut: bool = True, name: str = None):
+        super(BasicBlock, self).__init__()
+        self.stride = stride
+        self.conv0 = ConvBNLayer(num_channels=num_channels,
+                                 num_filters=num_filters,
+                                 filter_size=3,
+                                 stride=stride,
+                                 act="relu",
+                                 name=name + "_branch2a")
+        self.conv1 = ConvBNLayer(num_channels=num_filters,
+                                 num_filters=num_filters,
+                                 filter_size=3,
+                                 act=None,
+                                 name=name + "_branch2b")
+
+        if not shortcut:
+            self.short = ConvBNLayer(num_channels=num_channels,
+                                     num_filters=num_filters,
+                                     filter_size=1,
+                                     stride=stride,
+                                     name=name + "_branch1")
+
+        self.shortcut = shortcut
+
+    def forward(self, inputs: paddle.Tensor):
+        y = self.conv0(inputs)
+        conv1 = self.conv1(y)
+
+        if self.shortcut:
+            short = inputs
+        else:
+            short = self.short(inputs)
+        y = paddle.elementwise_add(x=short, y=conv1, act="relu")
+        return y
+
+
+@moduleinfo(name="resnet34_imagenet",
+            type="CV/classification",
+            author="paddlepaddle",
+            author_email="",
+            summary="resnet34_imagenet is a classification model, "
+            "this module is trained with Baidu open sourced dataset.",
+            version="1.1.0",
+            meta=ImageClassifierModule)
+class ResNet34(nn.Layer):
+    """ResNet34 model."""
+    def __init__(self, class_dim: int = 1000, load_checkpoint: str = None):
+        super(ResNet34, self).__init__()
+
+        self.layers = 34
+        depth = [3, 4, 6, 3]
+        num_channels = [64, 64, 128, 256]
+        num_filters = [64, 128, 256, 512]
+
+        self.conv = ConvBNLayer(num_channels=3, num_filters=64, filter_size=7, stride=2, act="relu", name="conv1")
+        self.pool2d_max = MaxPool2d(kernel_size=3, stride=2, padding=1)
+
+        self.block_list = []
+
+        for block in range(len(depth)):
+            shortcut = False
+            for i in range(depth[block]):
+                conv_name = "res" + str(block + 2) + chr(97 + i)
+                basic_block = self.add_sublayer(
+                    conv_name,
+                    BasicBlock(num_channels=num_channels[block] if i == 0 else num_filters[block],
+                               num_filters=num_filters[block],
+                               stride=2 if i == 0 and block != 0 else 1,
+                               shortcut=shortcut,
+                               name=conv_name))
+                self.block_list.append(basic_block)
+                shortcut = True
+
+        self.pool2d_avg = AdaptiveAvgPool2d(1)
+
+        self.pool2d_avg_channels = num_channels[-1] * 2
+
+        stdv = 1.0 / math.sqrt(self.pool2d_avg_channels * 1.0)
+
+        self.out = Linear(self.pool2d_avg_channels,
+                          class_dim,
+                          weight_attr=ParamAttr(initializer=Uniform(-stdv, stdv), name="fc_0.w_0"),
+                          bias_attr=ParamAttr(name="fc_0.b_0"))
+
+        if load_checkpoint is not None:
+            model_dict = paddle.load(load_checkpoint)[0]
+            self.set_dict(model_dict)
+            print("load custom checkpoint success")
+
+        else:
+            checkpoint = os.path.join(self.directory, 'resnet34_imagenet.pdparams')
+            if not os.path.exists(checkpoint):
+                os.system(
+                    'wget https://paddlehub.bj.bcebos.com/dygraph/image_classification/resnet34_imagenet.pdparams -O ' +
+                    checkpoint)
+            model_dict = paddle.load(checkpoint)[0]
+            self.set_dict(model_dict)
+            print("load pretrained checkpoint success")
+
+    def forward(self, inputs: paddle.Tensor):
+        y = self.conv(inputs)
+        y = self.pool2d_max(y)
+        for block in self.block_list:
+            y = block(y)
+        y = self.pool2d_avg(y)
+        y = paddle.reshape(y, shape=[-1, self.pool2d_avg_channels])
+        y = self.out(y)
+        return y

hub_module/modules/image/classification/resnet34_vd_imagenet/module.py

+# copyright (c) 2020 PaddlePaddle Authors. All Rights Reserve.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+import os
+import math
+
+import numpy as np
+import paddle
+from paddle import ParamAttr
+import paddle.nn as nn
+from paddle.nn import Conv2d, BatchNorm, Linear, Dropout
+from paddle.nn import AdaptiveAvgPool2d, MaxPool2d, AvgPool2d
+from paddle.nn.initializer import Uniform
+from paddlehub.module.module import moduleinfo
+from paddlehub.module.cv_module import ImageClassifierModule
+
+
+class ConvBNLayer(nn.Layer):
+    """Basic conv bn layer."""
+    def __init__(
+        self,
+        num_channels: int,
+        num_filters: int,
+        filter_size: int,
+        stride: int = 1,
+        groups: int = 1,
+        is_vd_mode: bool = False,
+        act: str = None,
+        name: str = None,
+    ):
+        super(ConvBNLayer, self).__init__()
+
+        self.is_vd_mode = is_vd_mode
+        self._pool2d_avg = AvgPool2d(kernel_size=2, stride=2, padding=0, ceil_mode=True)
+        self._conv = Conv2d(in_channels=num_channels,
+                            out_channels=num_filters,
+                            kernel_size=filter_size,
+                            stride=stride,
+                            padding=(filter_size - 1) // 2,
+                            groups=groups,
+                            weight_attr=ParamAttr(name=name + "_weights"),
+                            bias_attr=False)
+        if name == "conv1":
+            bn_name = "bn_" + name
+        else:
+            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')
+
+    def forward(self, inputs: paddle.Tensor):
+        if self.is_vd_mode:
+            inputs = self._pool2d_avg(inputs)
+        y = self._conv(inputs)
+        y = self._batch_norm(y)
+        return y
+
+
+class BottleneckBlock(nn.Layer):
+    """Bottleneck Block for ResNet34_vd."""
+    def __init__(self,
+                 num_channels: int,
+                 num_filters: int,
+                 stride: int,
+                 shortcut: bool = True,
+                 if_first: bool = False,
+                 name: str = None):
+        super(BottleneckBlock, self).__init__()
+
+        self.conv0 = ConvBNLayer(num_channels=num_channels,
+                                 num_filters=num_filters,
+                                 filter_size=1,
+                                 act='relu',
+                                 name=name + "_branch2a")
+        self.conv1 = ConvBNLayer(num_channels=num_filters,
+                                 num_filters=num_filters,
+                                 filter_size=3,
+                                 stride=stride,
+                                 act='relu',
+                                 name=name + "_branch2b")
+        self.conv2 = ConvBNLayer(num_channels=num_filters,
+                                 num_filters=num_filters * 4,
+                                 filter_size=1,
+                                 act=None,
+                                 name=name + "_branch2c")
+
+        if not shortcut:
+            self.short = ConvBNLayer(num_channels=num_channels,
+                                     num_filters=num_filters * 4,
+                                     filter_size=1,
+                                     stride=1,
+                                     is_vd_mode=False if if_first else True,
+                                     name=name + "_branch1")
+
+        self.shortcut = shortcut
+
+    def forward(self, inputs: paddle.Tensor):
+        y = self.conv0(inputs)
+        conv1 = self.conv1(y)
+        conv2 = self.conv2(conv1)
+
+        if self.shortcut:
+            short = inputs
+        else:
+            short = self.short(inputs)
+        y = paddle.elementwise_add(x=short, y=conv2, act='relu')
+        return y
+
+
+class BasicBlock(nn.Layer):
+    """Basic block for ResNet34_vd."""
+    def __init__(self,
+                 num_channels: int,
+                 num_filters: int,
+                 stride: int,
+                 shortcut: bool = True,
+                 if_first: bool = False,
+                 name: str = None):
+        super(BasicBlock, self).__init__()
+        self.stride = stride
+        self.conv0 = ConvBNLayer(num_channels=num_channels,
+                                 num_filters=num_filters,
+                                 filter_size=3,
+                                 stride=stride,
+                                 act='relu',
+                                 name=name + "_branch2a")
+        self.conv1 = ConvBNLayer(num_channels=num_filters,
+                                 num_filters=num_filters,
+                                 filter_size=3,
+                                 act=None,
+                                 name=name + "_branch2b")
+
+        if not shortcut:
+            self.short = ConvBNLayer(num_channels=num_channels,
+                                     num_filters=num_filters,
+                                     filter_size=1,
+                                     stride=1,
+                                     is_vd_mode=False if if_first else True,
+                                     name=name + "_branch1")
+
+        self.shortcut = shortcut
+
+    def forward(self, inputs: paddle.Tensor):
+        y = self.conv0(inputs)
+        conv1 = self.conv1(y)
+
+        if self.shortcut:
+            short = inputs
+        else:
+            short = self.short(inputs)
+        y = paddle.elementwise_add(x=short, y=conv1, act='relu')
+        return y
+
+
+@moduleinfo(name="resnet34_vd_imagenet",
+            type="CV/classification",
+            author="paddlepaddle",
+            author_email="",
+            summary="resnet34_vd_imagenet is a classification model, "
+            "this module is trained with Baidu open sourced dataset.",
+            version="1.1.0",
+            meta=ImageClassifierModule)
+class ResNet34_vd(nn.Layer):
+    """ResNet34_vd model."""
+    def __init__(self, class_dim: int = 1000, load_checkpoint: str = None):
+        super(ResNet34_vd, self).__init__()
+
+        self.layers = 34
+        depth = [3, 4, 6, 3]
+        num_channels = [64, 64, 128, 256]
+        num_filters = [64, 128, 256, 512]
+
+        self.conv1_1 = ConvBNLayer(num_channels=3, num_filters=32, filter_size=3, stride=2, act='relu', name="conv1_1")
+        self.conv1_2 = ConvBNLayer(num_channels=32, num_filters=32, filter_size=3, stride=1, act='relu', name="conv1_2")
+        self.conv1_3 = ConvBNLayer(num_channels=32, num_filters=64, filter_size=3, stride=1, act='relu', name="conv1_3")
+        self.pool2d_max = MaxPool2d(kernel_size=3, stride=2, padding=1)
+
+        self.block_list = []
+
+        for block in range(len(depth)):
+            shortcut = False
+            for i in range(depth[block]):
+                conv_name = "res" + str(block + 2) + chr(97 + i)
+                basic_block = self.add_sublayer(
+                    'bb_%d_%d' % (block, i),
+                    BasicBlock(num_channels=num_channels[block] if i == 0 else num_filters[block],
+                               num_filters=num_filters[block],
+                               stride=2 if i == 0 and block != 0 else 1,
+                               shortcut=shortcut,
+                               if_first=block == i == 0,
+                               name=conv_name))
+                self.block_list.append(basic_block)
+                shortcut = True
+
+        self.pool2d_avg = AdaptiveAvgPool2d(1)
+        self.pool2d_avg_channels = num_channels[-1] * 2
+        stdv = 1.0 / math.sqrt(self.pool2d_avg_channels * 1.0)
+
+        self.out = Linear(self.pool2d_avg_channels,
+                          class_dim,
+                          weight_attr=ParamAttr(initializer=Uniform(-stdv, stdv), name="fc_0.w_0"),
+                          bias_attr=ParamAttr(name="fc_0.b_0"))
+
+        if load_checkpoint is not None:
+            model_dict = paddle.load(load_checkpoint)[0]
+            self.set_dict(model_dict)
+            print("load custom checkpoint success")
+
+        else:
+            checkpoint = os.path.join(self.directory, 'resnet34_vd_imagenet.pdparams')
+            if not os.path.exists(checkpoint):
+                os.system(
+                    'wget https://paddlehub.bj.bcebos.com/dygraph/image_classification/resnet34_vd_imagenet.pdparams -O '
+                    + checkpoint)
+            model_dict = paddle.load(checkpoint)[0]
+            self.set_dict(model_dict)
+            print("load pretrained checkpoint success")
+
+    def forward(self, inputs: paddle.Tensor):
+        y = self.conv1_1(inputs)
+        y = self.conv1_2(y)
+        y = self.conv1_3(y)
+        y = self.pool2d_max(y)
+        for block in self.block_list:
+            y = block(y)
+        y = self.pool2d_avg(y)
+        y = paddle.reshape(y, shape=[-1, self.pool2d_avg_channels])
+        y = self.out(y)
+        return y

hub_module/modules/image/classification/resnet34_vd_imagenet_ssld/module.py

+# copyright (c) 2020 PaddlePaddle Authors. All Rights Reserve.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+import os
+import math
+
+import numpy as np
+import paddle
+from paddle import ParamAttr
+import paddle.nn as nn
+from paddle.nn import Conv2d, BatchNorm, Linear, Dropout
+from paddle.nn import AdaptiveAvgPool2d, MaxPool2d, AvgPool2d
+from paddle.nn.initializer import Uniform
+from paddlehub.module.module import moduleinfo
+from paddlehub.module.cv_module import ImageClassifierModule
+
+
+class ConvBNLayer(nn.Layer):
+    """Basic conv bn layer."""
+    def __init__(
+        self,
+        num_channels: int,
+        num_filters: int,
+        filter_size: int,
+        stride: int = 1,
+        groups: int = 1,
+        is_vd_mode: bool = False,
+        act: str = None,
+        name: str = None,
+    ):
+        super(ConvBNLayer, self).__init__()
+
+        self.is_vd_mode = is_vd_mode
+        self._pool2d_avg = AvgPool2d(kernel_size=2, stride=2, padding=0, ceil_mode=True)
+        self._conv = Conv2d(in_channels=num_channels,
+                            out_channels=num_filters,
+                            kernel_size=filter_size,
+                            stride=stride,
+                            padding=(filter_size - 1) // 2,
+                            groups=groups,
+                            weight_attr=ParamAttr(name=name + "_weights"),
+                            bias_attr=False)
+        if name == "conv1":
+            bn_name = "bn_" + name
+        else:
+            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')
+
+    def forward(self, inputs: paddle.Tensor):
+        if self.is_vd_mode:
+            inputs = self._pool2d_avg(inputs)
+        y = self._conv(inputs)
+        y = self._batch_norm(y)
+        return y
+
+
+class BottleneckBlock(nn.Layer):
+    """Bottleneck Block for ResNet34_vd."""
+    def __init__(self,
+                 num_channels: int,
+                 num_filters: int,
+                 stride: int,
+                 shortcut: bool = True,
+                 if_first: bool = False,
+                 name: str = None):
+        super(BottleneckBlock, self).__init__()
+
+        self.conv0 = ConvBNLayer(num_channels=num_channels,
+                                 num_filters=num_filters,
+                                 filter_size=1,
+                                 act='relu',
+                                 name=name + "_branch2a")
+        self.conv1 = ConvBNLayer(num_channels=num_filters,
+                                 num_filters=num_filters,
+                                 filter_size=3,
+                                 stride=stride,
+                                 act='relu',
+                                 name=name + "_branch2b")
+        self.conv2 = ConvBNLayer(num_channels=num_filters,
+                                 num_filters=num_filters * 4,
+                                 filter_size=1,
+                                 act=None,
+                                 name=name + "_branch2c")
+
+        if not shortcut:
+            self.short = ConvBNLayer(num_channels=num_channels,
+                                     num_filters=num_filters * 4,
+                                     filter_size=1,
+                                     stride=1,
+                                     is_vd_mode=False if if_first else True,
+                                     name=name + "_branch1")
+
+        self.shortcut = shortcut
+
+    def forward(self, inputs: paddle.Tensor):
+        y = self.conv0(inputs)
+        conv1 = self.conv1(y)
+        conv2 = self.conv2(conv1)
+
+        if self.shortcut:
+            short = inputs
+        else:
+            short = self.short(inputs)
+        y = paddle.elementwise_add(x=short, y=conv2, act='relu')
+        return y
+
+
+class BasicBlock(nn.Layer):
+    """Basic block for ResNet34_vd."""
+    def __init__(self,
+                 num_channels: int,
+                 num_filters: int,
+                 stride: int,
+                 shortcut: bool = True,
+                 if_first: bool = False,
+                 name: str = None):
+        super(BasicBlock, self).__init__()
+        self.stride = stride
+        self.conv0 = ConvBNLayer(num_channels=num_channels,
+                                 num_filters=num_filters,
+                                 filter_size=3,
+                                 stride=stride,
+                                 act='relu',
+                                 name=name + "_branch2a")
+        self.conv1 = ConvBNLayer(num_channels=num_filters,
+                                 num_filters=num_filters,
+                                 filter_size=3,
+                                 act=None,
+                                 name=name + "_branch2b")
+
+        if not shortcut:
+            self.short = ConvBNLayer(num_channels=num_channels,
+                                     num_filters=num_filters,
+                                     filter_size=1,
+                                     stride=1,
+                                     is_vd_mode=False if if_first else True,
+                                     name=name + "_branch1")
+
+        self.shortcut = shortcut
+
+    def forward(self, inputs: paddle.Tensor):
+        y = self.conv0(inputs)
+        conv1 = self.conv1(y)
+
+        if self.shortcut:
+            short = inputs
+        else:
+            short = self.short(inputs)
+        y = paddle.elementwise_add(x=short, y=conv1, act='relu')
+        return y
+
+
+@moduleinfo(name="resnet34_vd_imagenet_ssld",
+            type="CV/classification",
+            author="paddlepaddle",
+            author_email="",
+            summary="resnet34_vd_imagenet_ssld is a classification model, "
+            "this module is trained with Baidu open sourced dataset.",
+            version="1.1.0",
+            meta=ImageClassifierModule)
+class ResNet34_vd(nn.Layer):
+    """ResNet34_vd model."""
+    def __init__(self, class_dim: int = 1000, load_checkpoint: str = None):
+        super(ResNet34_vd, self).__init__()
+
+        self.layers = 34
+        depth = [3, 4, 6, 3]
+        num_channels = [64, 64, 128, 256]
+        num_filters = [64, 128, 256, 512]
+
+        self.conv1_1 = ConvBNLayer(num_channels=3, num_filters=32, filter_size=3, stride=2, act='relu', name="conv1_1")
+        self.conv1_2 = ConvBNLayer(num_channels=32, num_filters=32, filter_size=3, stride=1, act='relu', name="conv1_2")
+        self.conv1_3 = ConvBNLayer(num_channels=32, num_filters=64, filter_size=3, stride=1, act='relu', name="conv1_3")
+        self.pool2d_max = MaxPool2d(kernel_size=3, stride=2, padding=1)
+
+        self.block_list = []
+
+        for block in range(len(depth)):
+            shortcut = False
+            for i in range(depth[block]):
+                conv_name = "res" + str(block + 2) + chr(97 + i)
+                basic_block = self.add_sublayer(
+                    'bb_%d_%d' % (block, i),
+                    BasicBlock(num_channels=num_channels[block] if i == 0 else num_filters[block],
+                               num_filters=num_filters[block],
+                               stride=2 if i == 0 and block != 0 else 1,
+                               shortcut=shortcut,
+                               if_first=block == i == 0,
+                               name=conv_name))
+                self.block_list.append(basic_block)
+                shortcut = True
+
+        self.pool2d_avg = AdaptiveAvgPool2d(1)
+        self.pool2d_avg_channels = num_channels[-1] * 2
+        stdv = 1.0 / math.sqrt(self.pool2d_avg_channels * 1.0)
+
+        self.out = Linear(self.pool2d_avg_channels,
+                          class_dim,
+                          weight_attr=ParamAttr(initializer=Uniform(-stdv, stdv), name="fc_0.w_0"),
+                          bias_attr=ParamAttr(name="fc_0.b_0"))
+
+        if load_checkpoint is not None:
+            model_dict = paddle.load(load_checkpoint)[0]
+            self.set_dict(model_dict)
+            print("load custom checkpoint success")
+
+        else:
+            checkpoint = os.path.join(self.directory, 'resnet34_vd_ssld_imagenet.pdparams')
+            if not os.path.exists(checkpoint):
+                os.system(
+                    'wget https://paddlehub.bj.bcebos.com/dygraph/image_classification/resnet34_vd_ssld_imagenet.pdparams -O '
+                    + checkpoint)
+            model_dict = paddle.load(checkpoint)[0]
+            self.set_dict(model_dict)
+            print("load pretrained checkpoint success")
+
+    def forward(self, inputs: paddle.Tensor):
+        y = self.conv1_1(inputs)
+        y = self.conv1_2(y)
+        y = self.conv1_3(y)
+        y = self.pool2d_max(y)
+        for block in self.block_list:
+            y = block(y)
+        y = self.pool2d_avg(y)
+        y = paddle.reshape(y, shape=[-1, self.pool2d_avg_channels])
+        y = self.out(y)
+        return y

hub_module/modules/image/classification/resnet50_imagenet/module.py

+# copyright (c) 2020 PaddlePaddle Authors. All Rights Reserve.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import os
+import math
+
+import numpy as np
+import paddle
+from paddle import ParamAttr
+import paddle.nn as nn
+from paddle.nn import Conv2d, BatchNorm, Linear, Dropout
+from paddle.nn import AdaptiveAvgPool2d, MaxPool2d, AvgPool2d
+from paddle.nn.initializer import Uniform
+from paddlehub.module.module import moduleinfo
+from paddlehub.module.cv_module import ImageClassifierModule
+
+
+class ConvBNLayer(nn.Layer):
+    """Basic conv bn layer."""
+    def __init__(self,
+                 num_channels: int,
+                 num_filters: int,
+                 filter_size: int,
+                 stride: int = 1,
+                 groups: int = 1,
+                 act: str = None,
+                 name: str = None):
+        super(ConvBNLayer, self).__init__()
+
+        self._conv = Conv2d(in_channels=num_channels,
+                            out_channels=num_filters,
+                            kernel_size=filter_size,
+                            stride=stride,
+                            padding=(filter_size - 1) // 2,
+                            groups=groups,
+                            weight_attr=ParamAttr(name=name + "_weights"),
+                            bias_attr=False)
+        if name == "conv1":
+            bn_name = "bn_" + name
+        else:
+            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")
+
+    def forward(self, inputs: paddle.Tensor):
+        y = self._conv(inputs)
+        y = self._batch_norm(y)
+        return y
+
+
+class BottleneckBlock(nn.Layer):
+    """Bottleneck Block for ResNet50."""
+    def __init__(self, num_channels: int, num_filters: int, stride: int, shortcut: bool = True, name: str = None):
+        super(BottleneckBlock, self).__init__()
+
+        self.conv0 = ConvBNLayer(num_channels=num_channels,
+                                 num_filters=num_filters,
+                                 filter_size=1,
+                                 act="relu",
+                                 name=name + "_branch2a")
+        self.conv1 = ConvBNLayer(num_channels=num_filters,
+                                 num_filters=num_filters,
+                                 filter_size=3,
+                                 stride=stride,
+                                 act="relu",
+                                 name=name + "_branch2b")
+        self.conv2 = ConvBNLayer(num_channels=num_filters,
+                                 num_filters=num_filters * 4,
+                                 filter_size=1,
+                                 act=None,
+                                 name=name + "_branch2c")
+
+        if not shortcut:
+            self.short = ConvBNLayer(num_channels=num_channels,
+                                     num_filters=num_filters * 4,
+                                     filter_size=1,
+                                     stride=stride,
+                                     name=name + "_branch1")
+
+        self.shortcut = shortcut
+
+        self._num_channels_out = num_filters * 4
+
+    def forward(self, inputs: paddle.Tensor):
+        y = self.conv0(inputs)
+        conv1 = self.conv1(y)
+        conv2 = self.conv2(conv1)
+
+        if self.shortcut:
+            short = inputs
+        else:
+            short = self.short(inputs)
+
+        y = paddle.elementwise_add(x=short, y=conv2, act="relu")
+        return y
+
+
+class BasicBlock(nn.Layer):
+    """Basic block for ResNet50."""
+    def __init__(self, num_channels: int, num_filters: int, stride: int, shortcut: bool = True, name: str = None):
+        super(BasicBlock, self).__init__()
+        self.stride = stride
+        self.conv0 = ConvBNLayer(num_channels=num_channels,
+                                 num_filters=num_filters,
+                                 filter_size=3,
+                                 stride=stride,
+                                 act="relu",
+                                 name=name + "_branch2a")
+        self.conv1 = ConvBNLayer(num_channels=num_filters,
+                                 num_filters=num_filters,
+                                 filter_size=3,
+                                 act=None,
+                                 name=name + "_branch2b")
+
+        if not shortcut:
+            self.short = ConvBNLayer(num_channels=num_channels,
+                                     num_filters=num_filters,
+                                     filter_size=1,
+                                     stride=stride,
+                                     name=name + "_branch1")
+
+        self.shortcut = shortcut
+
+    def forward(self, inputs: paddle.Tensor):
+        y = self.conv0(inputs)
+        conv1 = self.conv1(y)
+
+        if self.shortcut:
+            short = inputs
+        else:
+            short = self.short(inputs)
+        y = paddle.elementwise_add(x=short, y=conv1, act="relu")
+        return y
+
+
+@moduleinfo(name="resnet50_imagenet",
+            type="CV/classification",
+            author="paddlepaddle",
+            author_email="",
+            summary="resnet50_imagenet is a classification model, "
+            "this module is trained with Baidu open sourced dataset.",
+            version="1.1.0",
+            meta=ImageClassifierModule)
+class ResNet50(nn.Layer):
+    """ResNet50 model."""
+    def __init__(self, class_dim: int = 1000, load_checkpoint: str = None):
+        super(ResNet50, self).__init__()
+
+        self.layers = 50
+        depth = [3, 4, 6, 3]
+        num_channels = [64, 256, 512, 1024]
+        num_filters = [64, 128, 256, 512]
+
+        self.conv = ConvBNLayer(num_channels=3, num_filters=64, filter_size=7, stride=2, act="relu", name="conv1")
+        self.pool2d_max = MaxPool2d(kernel_size=3, stride=2, padding=1)
+
+        self.block_list = []
+
+        for block in range(len(depth)):
+            shortcut = False
+            for i in range(depth[block]):
+                conv_name = "res" + str(block + 2) + chr(97 + i)
+                bottleneck_block = self.add_sublayer(
+                    conv_name,
+                    BottleneckBlock(num_channels=num_channels[block] if i == 0 else num_filters[block] * 4,
+                                    num_filters=num_filters[block],
+                                    stride=2 if i == 0 and block != 0 else 1,
+                                    shortcut=shortcut,
+                                    name=conv_name))
+                self.block_list.append(bottleneck_block)
+                shortcut = True
+
+        self.pool2d_avg = AdaptiveAvgPool2d(1)
+
+        self.pool2d_avg_channels = num_channels[-1] * 2
+
+        stdv = 1.0 / math.sqrt(self.pool2d_avg_channels * 1.0)
+
+        self.out = Linear(self.pool2d_avg_channels,
+                          class_dim,
+                          weight_attr=ParamAttr(initializer=Uniform(-stdv, stdv), name="fc_0.w_0"),
+                          bias_attr=ParamAttr(name="fc_0.b_0"))
+
+        if load_checkpoint is not None:
+            model_dict = paddle.load(load_checkpoint)[0]
+            self.set_dict(model_dict)
+            print("load custom checkpoint success")
+
+        else:
+            checkpoint = os.path.join(self.directory, 'resnet50_imagenet.pdparams')
+            if not os.path.exists(checkpoint):
+                os.system(
+                    'wget https://paddlehub.bj.bcebos.com/dygraph/image_classification/resnet50_imagenet.pdparams -O ' +
+                    checkpoint)
+            model_dict = paddle.load(checkpoint)[0]
+            self.set_dict(model_dict)
+            print("load pretrained checkpoint success")
+
+    def forward(self, inputs: paddle.Tensor):
+        y = self.conv(inputs)
+        y = self.pool2d_max(y)
+        for block in self.block_list:
+            y = block(y)
+        y = self.pool2d_avg(y)
+        y = paddle.reshape(y, shape=[-1, self.pool2d_avg_channels])
+        y = self.out(y)
+        return y

hub_module/modules/image/classification/resnet50_vd_imagenet/module.py

+# copyright (c) 2020 PaddlePaddle Authors. All Rights Reserve.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+import os
+import math
+
+import numpy as np
+import paddle
+from paddle import ParamAttr
+import paddle.nn as nn
+from paddle.nn import Conv2d, BatchNorm, Linear, Dropout
+from paddle.nn import AdaptiveAvgPool2d, MaxPool2d, AvgPool2d
+from paddle.nn.initializer import Uniform
+from paddlehub.module.module import moduleinfo
+from paddlehub.module.cv_module import ImageClassifierModule
+
+
+class ConvBNLayer(nn.Layer):
+    """Basic conv bn layer."""
+    def __init__(
+        self,
+        num_channels: int,
+        num_filters: int,
+        filter_size: int,
+        stride: int = 1,
+        groups: int = 1,
+        is_vd_mode: bool = False,
+        act: str = None,
+        name: str = None,
+    ):
+        super(ConvBNLayer, self).__init__()
+
+        self.is_vd_mode = is_vd_mode
+        self._pool2d_avg = AvgPool2d(kernel_size=2, stride=2, padding=0, ceil_mode=True)
+        self._conv = Conv2d(in_channels=num_channels,
+                            out_channels=num_filters,
+                            kernel_size=filter_size,
+                            stride=stride,
+                            padding=(filter_size - 1) // 2,
+                            groups=groups,
+                            weight_attr=ParamAttr(name=name + "_weights"),
+                            bias_attr=False)
+        if name == "conv1":
+            bn_name = "bn_" + name
+        else:
+            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')
+
+    def forward(self, inputs: paddle.Tensor):
+        if self.is_vd_mode:
+            inputs = self._pool2d_avg(inputs)
+        y = self._conv(inputs)
+        y = self._batch_norm(y)
+        return y
+
+
+class BottleneckBlock(nn.Layer):
+    """Bottleneck Block for ResNet50_vd."""
+    def __init__(self,
+                 num_channels: int,
+                 num_filters: int,
+                 stride: int,
+                 shortcut: bool = True,
+                 if_first: bool = False,
+                 name: str = None):
+        super(BottleneckBlock, self).__init__()
+
+        self.conv0 = ConvBNLayer(num_channels=num_channels,
+                                 num_filters=num_filters,
+                                 filter_size=1,
+                                 act='relu',
+                                 name=name + "_branch2a")
+        self.conv1 = ConvBNLayer(num_channels=num_filters,
+                                 num_filters=num_filters,
+                                 filter_size=3,
+                                 stride=stride,
+                                 act='relu',
+                                 name=name + "_branch2b")
+        self.conv2 = ConvBNLayer(num_channels=num_filters,
+                                 num_filters=num_filters * 4,
+                                 filter_size=1,
+                                 act=None,
+                                 name=name + "_branch2c")
+
+        if not shortcut:
+            self.short = ConvBNLayer(num_channels=num_channels,
+                                     num_filters=num_filters * 4,
+                                     filter_size=1,
+                                     stride=1,
+                                     is_vd_mode=False if if_first else True,
+                                     name=name + "_branch1")
+
+        self.shortcut = shortcut
+
+    def forward(self, inputs: paddle.Tensor):
+        y = self.conv0(inputs)
+        conv1 = self.conv1(y)
+        conv2 = self.conv2(conv1)
+
+        if self.shortcut:
+            short = inputs
+        else:
+            short = self.short(inputs)
+        y = paddle.elementwise_add(x=short, y=conv2, act='relu')
+        return y
+
+
+class BasicBlock(nn.Layer):
+    """Basic block for ResNet50_vd."""
+    def __init__(self,
+                 num_channels: int,
+                 num_filters: int,
+                 stride: int,
+                 shortcut: bool = True,
+                 if_first: bool = False,
+                 name: str = None):
+        super(BasicBlock, self).__init__()
+        self.stride = stride
+        self.conv0 = ConvBNLayer(num_channels=num_channels,
+                                 num_filters=num_filters,
+                                 filter_size=3,
+                                 stride=stride,
+                                 act='relu',
+                                 name=name + "_branch2a")
+        self.conv1 = ConvBNLayer(num_channels=num_filters,
+                                 num_filters=num_filters,
+                                 filter_size=3,
+                                 act=None,
+                                 name=name + "_branch2b")
+
+        if not shortcut:
+            self.short = ConvBNLayer(num_channels=num_channels,
+                                     num_filters=num_filters,
+                                     filter_size=1,
+                                     stride=1,
+                                     is_vd_mode=False if if_first else True,
+                                     name=name + "_branch1")
+
+        self.shortcut = shortcut
+
+    def forward(self, inputs: paddle.Tensor):
+        y = self.conv0(inputs)
+        conv1 = self.conv1(y)
+
+        if self.shortcut:
+            short = inputs
+        else:
+            short = self.short(inputs)
+        y = paddle.elementwise_add(x=short, y=conv1, act='relu')
+        return y
+
+
+@moduleinfo(name="resnet50_vd_imagenet",
+            type="CV/classification",
+            author="paddlepaddle",
+            author_email="",
+            summary="resnet50_vd_imagenet is a classification model, "
+            "this module is trained with Imagenet dataset.",
+            version="1.1.0",
+            meta=ImageClassifierModule)
+class ResNet50_vd(nn.Layer):
+    """ResNet50_vd model."""
+    def __init__(self, class_dim: int = 1000, load_checkpoint: str = None):
+        super(ResNet50_vd, self).__init__()
+
+        self.layers = 50
+
+        depth = [3, 4, 6, 3]
+        num_channels = [64, 256, 512, 1024]
+        num_filters = [64, 128, 256, 512]
+
+        self.conv1_1 = ConvBNLayer(num_channels=3, num_filters=32, filter_size=3, stride=2, act='relu', name="conv1_1")
+        self.conv1_2 = ConvBNLayer(num_channels=32, num_filters=32, filter_size=3, stride=1, act='relu', name="conv1_2")
+        self.conv1_3 = ConvBNLayer(num_channels=32, num_filters=64, filter_size=3, stride=1, act='relu', name="conv1_3")
+        self.pool2d_max = MaxPool2d(kernel_size=3, stride=2, padding=1)
+
+        self.block_list = []
+
+        for block in range(len(depth)):
+            shortcut = False
+            for i in range(depth[block]):
+                conv_name = "res" + str(block + 2) + chr(97 + i)
+                bottleneck_block = self.add_sublayer(
+                    'bb_%d_%d' % (block, i),
+                    BottleneckBlock(num_channels=num_channels[block] if i == 0 else num_filters[block] * 4,
+                                    num_filters=num_filters[block],
+                                    stride=2 if i == 0 and block != 0 else 1,
+                                    shortcut=shortcut,
+                                    if_first=block == i == 0,
+                                    name=conv_name))
+                self.block_list.append(bottleneck_block)
+                shortcut = True
+
+        self.pool2d_avg = AdaptiveAvgPool2d(1)
+        self.pool2d_avg_channels = num_channels[-1] * 2
+        stdv = 1.0 / math.sqrt(self.pool2d_avg_channels * 1.0)
+
+        self.out = Linear(self.pool2d_avg_channels,
+                          class_dim,
+                          weight_attr=ParamAttr(initializer=Uniform(-stdv, stdv), name="fc_0.w_0"),
+                          bias_attr=ParamAttr(name="fc_0.b_0"))
+
+        if load_checkpoint is not None:
+            model_dict = paddle.load(load_checkpoint)[0]
+            self.set_dict(model_dict)
+            print("load custom checkpoint success")
+
+        else:
+            checkpoint = os.path.join(self.directory, 'resnet50_vd_imagenet.pdparams')
+            if not os.path.exists(checkpoint):
+                os.system(
+                    'wget https://paddlehub.bj.bcebos.com/dygraph/image_classification/resnet50_vd_imagenet.pdparams -O '
+                    + checkpoint)
+            model_dict = paddle.load(checkpoint)[0]
+            self.set_dict(model_dict)
+            print("load pretrained checkpoint success")
+
+    def forward(self, inputs: paddle.Tensor):
+        y = self.conv1_1(inputs)
+        y = self.conv1_2(y)
+        y = self.conv1_3(y)
+        y = self.pool2d_max(y)
+        for block in self.block_list:
+            y = block(y)
+        y = self.pool2d_avg(y)
+        y = paddle.reshape(y, shape=[-1, self.pool2d_avg_channels])
+        y = self.out(y)
+        return y