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| [English](README.md) | 简体中文
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| # PP-Tracking Python部署示例
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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. FastDeploy Python whl包安装,参考[FastDeploy Python安装](../../../../../docs/cn/build_and_install/download_prebuilt_libraries.md)
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| 
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| 本目录下提供`infer.py`快速完成PP-Tracking在CPU/GPU,以及GPU上通过TensorRT加速部署的示例。执行如下脚本即可完成
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| 
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| ```bash
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| #下载部署示例代码
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| git clone https://github.com/PaddlePaddle/FastDeploy.git
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| cd FastDeploy/examples/vision/tracking/pptracking/python
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| 
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| # 下载PP-Tracking模型文件和测试视频
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| wget https://bj.bcebos.com/paddlehub/fastdeploy/fairmot_hrnetv2_w18_dlafpn_30e_576x320.tgz
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| tar -xvf fairmot_hrnetv2_w18_dlafpn_30e_576x320.tgz
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| wget https://bj.bcebos.com/paddlehub/fastdeploy/person.mp4
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| # CPU推理
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| python infer.py --model fairmot_hrnetv2_w18_dlafpn_30e_576x320 --video person.mp4 --device cpu
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| # GPU推理
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| python infer.py --model fairmot_hrnetv2_w18_dlafpn_30e_576x320 --video person.mp4  --device gpu
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| # GPU上使用TensorRT推理 (注意:TensorRT推理第一次运行,有序列化模型的操作,有一定耗时,需要耐心等待)
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| python infer.py --model fairmot_hrnetv2_w18_dlafpn_30e_576x320 --video person.mp4  --device gpu --use_trt True
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| ```
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| 
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| ## PP-Tracking Python接口
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| 
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| ```python
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| fd.vision.tracking.PPTracking(model_file, params_file, config_file, runtime_option=None, model_format=ModelFormat.PADDLE)
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| ```
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| 
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| PP-Tracking模型加载和初始化,其中model_file, params_file以及config_file为训练模型导出的Paddle inference文件,具体请参考其文档说明[模型导出](https://github.com/PaddlePaddle/PaddleDetection/blob/release/2.5/deploy/pptracking/cpp/README.md)
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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
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| > * **config_file**(str): 推理部署配置文件
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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Paddle格式
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| 
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| ### predict函数
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| 
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| > ```python
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| > PPTracking.predict(frame)
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| > ```
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| >
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| > 模型预测结口,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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| > > * **frame**(np.ndarray): 输入数据,注意需为HWC,BGR格式,frame为视频帧如:_,frame=cap.read()得到
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| 
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| > **返回**
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| >
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| > > 返回`fastdeploy.vision.MOTResult`结构体,结构体说明参考文档[视觉模型预测结果](../../../../../docs/api/vision_results/)
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| 
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| ### 类成员属性
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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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| 
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| 
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| ## 其它文档
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| 
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| - [PP-Tracking 模型介绍](..)
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| - [PP-Tracking C++部署](../cpp)
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| - [模型预测结果说明](../../../../../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)
 |