提交 872d81fa 编写于 作者: S SunAhong1993

docs

上级 841bfa0b
......@@ -44,6 +44,11 @@ x2paddle --framework=caffe --prototxt=deploy.prototxt --weight=deploy.caffemodel
```
x2paddle --framework=onnx --model=onnx_model.onnx --save_dir=pd_model
```
### PyTorch
```
x2paddle --framework=pytorch --model=resnet50.pt --save_dir=pd_model
```
### Paddle2ONNX
```
# 注意:paddle_infer_model_dir下需包含__model__和__params__两个文件
......@@ -56,7 +61,7 @@ x2paddle --framework=paddle2onnx --model=paddle_infer_model_dir --save_dir=onnx_
|--prototxt | 当framework为caffe时,该参数指定caffe模型的proto文件路径 |
|--weight | 当framework为caffe时,该参数指定caffe模型的参数文件路径 |
|--save_dir | 指定转换后的模型保存目录路径 |
|--model | 当framework为tensorflow/onnx时,该参数指定tensorflow的pb模型文件或onnx模型路径 |
|--model | 当framework为tensorflow/onnx/pytorch时,该参数指定tensorflow的pb模型文件或onnx模型路径或者pytorch的script模型 |
|--caffe_proto | **[可选]** 由caffe.proto编译成caffe_pb2.py文件的存放路径,当存在自定义Layer时使用,默认为None |
|--without_data_format_optimization | **[可选]** For TensorFlow, 当指定该参数时,关闭NHWC->NCHW的优化,见[文档Q2](FAQ.md) |
|--define_input_shape | **[可选]** For TensorFlow, 当指定该参数时,强制用户输入每个Placeholder的shape,见[文档Q2](FAQ.md) |
......@@ -81,6 +86,7 @@ X2Paddle提供了工具解决如下问题,详见[tools/README.md](tools/README
3. [X2Paddle测试模型库](x2paddle_model_zoo.md)
4. [PyTorch模型导出为ONNX模型](pytorch_to_onnx.md)
5. [X2Paddle内置的Caffe自定义层](caffe_custom_layer.md)
6. [PyTorch模型导出为ScriptModule模型](pytorch_to_script.md)
## 更新历史
2019.08.05
......
## PyTorch模型导出为ONNX模型
目前pytorch2paddle主要支持pytorch ScriptModule。 用户可通过如下示例代码,将torchvison或者自己开发写的模型转换成ScriptModule model:
```
#coding: utf-8
import torch
import torch.nn as nn
from torchvision.models.utils import load_state_dict_from_url
# 定义模型
class AlexNet(nn.Module):
def __init__(self, num_classes=1000):
super(AlexNet, self).__init__()
self.features = nn.Sequential(
nn.Conv2d(3, 64, kernel_size=11, stride=4, padding=2),
nn.ReLU(inplace=True),
nn.MaxPool2d(kernel_size=3, stride=2),
nn.Conv2d(64, 192, kernel_size=5, padding=2),
nn.ReLU(inplace=True),
nn.MaxPool2d(kernel_size=3, stride=2),
nn.Conv2d(192, 384, kernel_size=3, padding=1),
nn.ReLU(inplace=True),
nn.Conv2d(384, 256, kernel_size=3, padding=1),
nn.ReLU(inplace=True),
nn.Conv2d(256, 256, kernel_size=3, padding=1),
nn.ReLU(inplace=True),
nn.MaxPool2d(kernel_size=3, stride=2),
)
self.avgpool = nn.AdaptiveAvgPool2d((6, 6))
self.classifier = nn.Sequential(
nn.Dropout(0.0),
nn.Linear(256 * 6 * 6, 4096),
nn.ReLU(inplace=True),
nn.Dropout(0.0),
nn.Linear(4096, 4096),
nn.ReLU(inplace=True),
nn.Linear(4096, num_classes),
)
def forward(self, x):
x = self.features(x)
for i in range(1):
x = self.avgpool(x)
x = torch.flatten(x, 1)
x = self.classifier(x)
return x
# 初始化模型
model = AlexNet()
# 加载参数
state_dict = load_state_dict_from_url('https://download.pytorch.org/models/alexnet-owt-4df8aa71.pth',
progress=True)
model.load_state_dict(state_dict)
# 设置模式
model.eval()
# 生成ScriptModule并保存
script = torch.jit.script(model)
torch.jit.save(script, "alexnet.pt")
```
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