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			91 lines
		
	
	
		
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			91 lines
		
	
	
		
			4.2 KiB
		
	
	
	
		
			Markdown
		
	
	
	
	
	
| # RetinaFace 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RetinaFace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
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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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| wget https://bj.bcebos.com/fastdeploy/release/cpp/fastdeploy-linux-x64-0.6.0.tgz
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| tar xvf fastdeploy-linux-x64-0.6.0.tgz
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| cmake .. -DFASTDEPLOY_INSTALL_DIR=${PWD}/fastdeploy-linux-x64-0.6.0
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| make -j
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| 
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| #下载官方转换好的RetinaFace模型文件和测试图片
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| wget https://bj.bcebos.com/paddlehub/fastdeploy/Pytorch_RetinaFace_mobile0.25-640-640.onnx
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| wget https://raw.githubusercontent.com/DefTruth/lite.ai.toolkit/main/examples/lite/resources/test_lite_face_detector_3.jpg
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| 
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| 
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| # CPU推理
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| ./infer_demo Pytorch_RetinaFace_mobile0.25-640-640.onnx test_lite_face_detector_3.jpg 0
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| # GPU推理
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| ./infer_demo Pytorch_RetinaFace_mobile0.25-640-640.onnx test_lite_face_detector_3.jpg 1
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| # GPU上TensorRT推理
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| ./infer_demo Pytorch_RetinaFace_mobile0.25-640-640.onnx test_lite_face_detector_3.jpg 2
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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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| <img width="640" src="https://user-images.githubusercontent.com/67993288/184301763-1b950047-c17f-4819-b175-c743b699c3b1.jpg">
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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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| ## RetinaFace C++接口
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| 
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| ### RetinaFace类
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| 
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| ```c++
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| fastdeploy::vision::facedet::RetinaFace(
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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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| RetinaFace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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| > RetinaFace::Predict(cv::Mat* im, FaceDetectionResult* result,
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| >                 float conf_threshold = 0.25,
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| >                 float nms_iou_threshold = 0.5)
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| > ```
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| >
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| > 模型预测接口,输入图像直接输出检测结果。
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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**: 检测结果,包括检测框,各个框的置信度, FaceDetectionResult说明参考[视觉模型预测结果](../../../../../docs/api/vision_results/)
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| > > * **conf_threshold**: 检测框置信度过滤阈值
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| > > * **nms_iou_threshold**: NMS处理过程中iou阈值
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| 
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| ### 类成员变量
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| #### 预处理参数
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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[640, 640]
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| > > * **variance**(vector<float>): 通过此参数可以修改图片在resize时候做填充(padding)的值, 包含三个浮点型元素, 分别表示三个通道的值, 默认值为[0, 0, 0]
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| > > * **min_sizes**(vector<vector<int>>): retinaface中的anchor的宽高设置,默认是 {{16, 32}, {64, 128}, {256, 512}},分别和步长8、16和32对应
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| > > * **downsample_strides**(vector<int>): 通过此参数可以修改生成anchor的特征图的下采样倍数, 包含三个整型元素, 分别表示默认的生成anchor的下采样倍数, 默认值为[8, 16, 32]
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| > > * **landmarks_per_face**(int): 指定当前模型检测的人脸所带的关键点个数,默认为5.
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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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