opencv官方文档地址
https://docs.opencv.org/master/
安装opencv(cv2)官方地址
https://pypi.org/project/opencv-python/
pip install opencv-python
opencv官方文档地址
https://docs.opencv.org/master/
安装opencv(cv2)官方地址
https://pypi.org/project/opencv-python/
pip install opencv-python