pip3 install opencv-contrib-python -i https://pypi.tuna.tsinghua.edu.cn/simple
No module named 'skbuild'
pip install scikit-build
pip3 install --upgrade pip
pip3 install -i https://pypi.tuna.tsinghua.edu.cn/simple scikit-build
pip3 install -i https://pypi.tuna.tsinghua.edu.cn/simple cmake
