Opencv，contrib安装

create -n opencv_env python=3.8

conda activate opencv_env

python -m pip install opencv-python -i https://pypi.tuna.tsinghua.edu.cn/simple --trusted-host pypi.tuna.tsinghua.edu.cn

python -m pip install opencv-contrib-python -i https://pypi.tuna.tsinghua.edu.cn/simple --trusted-host pypi.tuna.tsinghua.edu.cn