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			86 lines
		
	
	
		
			3.4 KiB
		
	
	
	
		
			Markdown
		
	
	
	
	
	
| # PFLD C++部署示例
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| 
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| 本目录下提供`infer.cc`快速完成PFLD在CPU/GPU,以及GPU上通过TensorRT加速部署的示例。
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| 
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| 在部署前,需确认以下两个步骤
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| 
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| - 1. 软硬件环境满足要求,参考[FastDeploy环境要求](../../../../../docs/cn/build_and_install/download_prebuilt_libraries.md)  
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| - 2. 根据开发环境,下载预编译部署库和samples代码,参考[FastDeploy预编译库](../../../../../docs/cn/build_and_install/download_prebuilt_libraries.md)
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| 
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| 以Linux上CPU推理为例,在本目录执行如下命令即可完成编译测试,支持此模型需保证FastDeploy版本1.0.2以上(x.x.x>=1.0.2), 或使用nightly built版本
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| 
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| ```bash
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| mkdir build
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| cd build
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| # 下载FastDeploy预编译库,用户可在上文提到的`FastDeploy预编译库`中自行选择合适的版本使用
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| wget https://bj.bcebos.com/fastdeploy/release/cpp/fastdeploy-linux-x64-x.x.x.tgz
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| tar xvf fastdeploy-linux-x64-x.x.x.tgz
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| cmake .. -DFASTDEPLOY_INSTALL_DIR=${PWD}/fastdeploy-linux-x64-x.x.x
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| make -j
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| 
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| #下载官方转换好的 PFLD 模型文件和测试图片
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| wget https://bj.bcebos.com/paddlehub/fastdeploy/pfld-106-lite.onnx
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| wget https://bj.bcebos.com/paddlehub/fastdeploy/facealign_input.png
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| 
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| # CPU推理
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| ./infer_demo --model pfld-106-lite.onnx --image facealign_input.png --device cpu
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| # GPU推理
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| ./infer_demo --model pfld-106-lite.onnx --image facealign_input.png --device gpu
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| # GPU上TensorRT推理
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| ./infer_demo --model pfld-106-lite.onnx --image facealign_input.png --device gpu --backend trt
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| ```
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| 
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| 运行完成可视化结果如下图所示
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| 
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| <div width="500">
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| <img width="470" height="384" float="left" src="https://user-images.githubusercontent.com/19977378/197931737-c2d8e760-a76d-478a-a6c9-4574fb5c70eb.png">
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| </div>
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| 
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| 以上命令只适用于Linux或MacOS, Windows下SDK的使用方式请参考:  
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| - [如何在Windows中使用FastDeploy C++ SDK](../../../../../docs/cn/faq/use_sdk_on_windows.md)
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| 
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| ## PFLD C++接口
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| 
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| ### PFLD 类
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| 
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| ```c++
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| fastdeploy::vision::facealign::PFLD(
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|         const string& model_file,
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|         const string& params_file = "",
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|         const RuntimeOption& runtime_option = RuntimeOption(),
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|         const ModelFormat& model_format = ModelFormat::ONNX)
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| ```
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| 
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| PFLD模型加载和初始化,其中model_file为导出的ONNX模型格式。
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| 
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| **参数**
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| 
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| > * **model_file**(str): 模型文件路径
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| > * **params_file**(str): 参数文件路径,当模型格式为ONNX时,此参数传入空字符串即可
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| > * **runtime_option**(RuntimeOption): 后端推理配置,默认为None,即采用默认配置
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| > * **model_format**(ModelFormat): 模型格式,默认为ONNX格式
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| 
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| #### Predict函数
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| 
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| > ```c++
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| > PFLD::Predict(cv::Mat* im, FaceAlignmentResult* result)
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| > ```
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| >
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| > 模型预测接口,输入图像直接输出landmarks结果。
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| >
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| > **参数**
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| >
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| > > * **im**: 输入图像,注意需为HWC,BGR格式
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| > > * **result**: landmarks结果, FaceAlignmentResult说明参考[视觉模型预测结果](../../../../../docs/api/vision_results/)
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| 
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| ### 类成员变量
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| 
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| 用户可按照自己的实际需求,修改下列预处理参数,从而影响最终的推理和部署效果
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| 
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| > > * **size**(vector<int>): 通过此参数修改预处理过程中resize的大小,包含两个整型元素,表示[width, height], 默认值为[112, 112]
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| 
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| - [模型介绍](../../)
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| - [Python部署](../python)
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| - [视觉模型预测结果](../../../../../docs/api/vision_results/)
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| - [如何切换模型推理后端引擎](../../../../../docs/cn/faq/how_to_change_backend.md)
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