尽量应用最新的树莓派Raspbian镜像，执行上面的命令更新零碎库：

sudo apt updatesudo apt install -y libatlas-base-dev libjasper-dev libqtgui4 python3-pyqt5 libqt4-test libhdf5-dev

pip3装置opencv4，只是特定几个版本的opencv能够装置

sudo pip3 install opencv-contrib-python==4.1.0.25# 或者sudo pip3 install opencv-contrib-python==4.4.0.46

测试

python3 -c "import cv2;print(cv2.__version__)"