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| [English](README.md) | 简体中文
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| # YOLOX 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YOLOX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0.7.0以上(x.x.x>=0.7.0)
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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YOLOX模型文件和测试图片
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| wget https://bj.bcebos.com/paddlehub/fastdeploy/yolox_s.onnx
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| wget https://gitee.com/paddlepaddle/PaddleDetection/raw/release/2.4/demo/000000014439.jpg
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| 
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| 
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| # CPU推理
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| ./infer_demo yolox_s.onnx 000000014439.jpg 0
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| # GPU推理
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| ./infer_demo yolox_s.onnx 000000014439.jpg 1
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| # GPU上TensorRT推理
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| ./infer_demo yolox_s.onnx 000000014439.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/67993288/184301746-04595d76-454a-4f07-8c7d-6f41418f8ae3.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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| 
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| ## YOLOX C++接口
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| 
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| ### YOLOX类
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| 
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| ```c++
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| fastdeploy::vision::detection::YOLOX(
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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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| YOLOX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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| > YOLOX::Predict(cv::Mat* im, DetectionResult* 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, DetectionResult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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| > > * **padding_value**(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[114, 114, 114]
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| > > * **is_no_pad**(bool): 通过此参数让图片是否通过填充的方式进行resize, `is_no_pad=ture` 表示不使用填充的方式,默认值为`is_no_pad=false`
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| > > * **is_decode_exported**(bool): 表示导出的YOLOX的onnx模型文件是否带坐标反算的decode部分, 默认值为`is_decode_exported=false`,官方默认的导出不带decode部分,如果您导出的模型带了decode,请将此参数设置为true  
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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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