yolov5安装

• 下载git
• 将下载后文件安装
• git bash: git clone https://github.com/ultralytics/yolov5.git
• cd yolov5
• pip install -r requirements.txt
• python detect.py --source data\images\bus.jpg --weights yolov5s.pt --conf 0.25 # 运行无错则torch安装成功