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  • Language
    Python
  • License
    Apache License 2.0
  • Created about 6 years ago
  • Updated 16 days ago

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Repository Details

ONNX Model Exporter for PaddlePaddle

Paddle2ONNX

简体中文 | English

🆕 新开源项目FastDeploy

如若你转换的目的是用于部署TensorRT、OpenVINO、ONNX Runtime,当前飞桨提供FastDeploy,支持150+模型直接部署到这些引擎上,Paddle2ONNX的转换流程也已经无需用户显式调用,帮助大家解决在转换过程中的各种Trick及对齐问题。

简介

Paddle2ONNX 支持将 PaddlePaddle 模型格式转化到 ONNX 模型格式。通过 ONNX 可以完成将 Paddle 模型到多种推理引擎的部署,包括 TensorRT/OpenVINO/MNN/TNN/NCNN,以及其它对 ONNX 开源格式进行支持的推理引擎或硬件。

感谢EasyEdge团队贡献的Paddle2Caffe, 支持将Paddle模型导出为Caffe格式,安装及使用方式参考Paddle2Caffe

模型库

Paddle2ONNX 建设了一个飞桨热点模型的模型库,包括 PicoDet、OCR、HumanSeg 等多种领域模型,有需求的开发者可直接下载使用,进入目录model_zoo了解更多详情!

环境依赖

安装

pip install paddle2onnx

使用

获取PaddlePaddle部署模型

Paddle2ONNX 在导出模型时,需要传入部署模型格式,包括两个文件

  • model_name.pdmodel: 表示模型结构
  • model_name.pdiparams: 表示模型参数 [注意] 这里需要注意,两个文件其中参数文件后辍为 .pdiparams,如你的参数文件后辍是 .pdparams,那说明你的参数是训练过程中保存的,当前还不是部署模型格式。 部署模型的导出可以参照各个模型套件的导出模型文档。

命令行转换

paddle2onnx --model_dir saved_inference_model \
            --model_filename model.pdmodel \
            --params_filename model.pdiparams \
            --save_file model.onnx \
            --enable_dev_version True

参数选项

参数 参数说明
--model_dir 配置包含 Paddle 模型的目录路径
--model_filename [可选] 配置位于 --model_dir 下存储网络结构的文件名
--params_filename [可选] 配置位于 --model_dir 下存储模型参数的文件名称
--save_file 指定转换后的模型保存目录路径
--opset_version [可选] 配置转换为 ONNX 的 OpSet 版本,目前支持 7~16 等多个版本,默认为 9
--enable_dev_version [可选] 是否使用新版本 Paddle2ONNX(推荐使用),默认为 True
--enable_onnx_checker [可选] 配置是否检查导出为 ONNX 模型的正确性, 建议打开此开关, 默认为 False
--enable_auto_update_opset [可选] 是否开启 opset version 自动升级功能,当低版本 opset 无法转换时,自动选择更高版本的 opset进行转换, 默认为 True
--deploy_backend [可选] 量化模型部署的推理引擎,支持 onnxruntime、tensorrt 或 others,当选择 others 时,所有的量化信息存储于 max_range.txt 文件中,默认为 onnxruntime
--save_calibration_file [可选] TensorRT 8.X版本部署量化模型需要读取的 cache 文件的保存路径,默认为 calibration.cache
--version [可选] 查看 paddle2onnx 版本
--external_filename [可选] 当导出的 ONNX 模型大于 2G 时,需要设置 external data 的存储路径,推荐设置为:external_data
--export_fp16_model [可选] 是否将导出的 ONNX 的模型转换为 FP16 格式,并用 ONNXRuntime-GPU 加速推理,默认为 False
--custom_ops [可选] 将 Paddle OP 导出为 ONNX 的 Custom OP,例如:--custom_ops '{"paddle_op":"onnx_op"},默认为 {}
  • 使用 onnxruntime 验证转换模型, 请注意安装最新版本(最低要求 1.10.0)

其他优化工具

  1. 如你对导出的 ONNX 模型有优化的需求,推荐使用 onnx-simplifier,也可使用如下命令对模型进行优化
python -m paddle2onnx.optimize --input_model model.onnx --output_model new_model.onnx
  1. 如需要修改导出 ONNX 的模型输入形状,如改为静态 shape
python -m paddle2onnx.optimize --input_model model.onnx \
                               --output_model new_model.onnx \
                               --input_shape_dict "{'x':[1,3,224,224]}"
  1. 如果你有裁剪 Paddle 模型,固化或修改 Paddle 模型输入 Shape 或者合并 Paddle 模型的权重文件等需求,请使用如下工具:Paddle 相关工具

  2. 如果你需要裁剪 ONNX 模型或者修改 ONNX 模型,请参考如下工具:ONNX 相关工具

  3. PaddleSlim 量化模型导出请参考:量化模型导出ONNX

使用VisualDL进行模型转换

飞桨可视化工具VisualDL已经将模型转换工具部署在官网提供服务,可以点击服务链接进行在线的Paddle2ONNX模型转换。

Paddle2ONNX

License

Provided under the Apache-2.0 license.

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