各平台安装OpenCVUbuntu 20.Ubuntu 20.如何在Ubuntu 20.04上安装OpenCV本文介绍了

Ubuntu 20.04上安装OpenCV

如何在Ubuntu 20.04上安装OpenCV本文介绍了如何在Ubuntu 20.04上安装OpenCV。要从源代码安装OpenCV的最新稳定版本，请向下滚动至本教程的从源代码安装OpenCV。选择最适合您的安装方法https://www.myfreax.com/how-to-install-opencv-on-ubuntu-20-04/

Windows编译安装OpenCV

Installation of OpenCV 4.1.0 in Windows 10 from source – CV-Tricks.comhttps://cv-tricks.com/how-to/installation-of-opencv-4-1-0-in-windows-10-from-source/

cmake指令可参考我的（开启了Python支持，关闭了example生成）：

cmake -D CMAKE_BUILD_TYPE=RELEASE     -D CMAKE_INSTALL_PREFIX=/usr/local     -D INSTALL_C_EXAMPLES=OFF     -D INSTALL_PYTHON_EXAMPLES=OFF     -D OPENCV_GENERATE_PKGCONFIG=ON     -D OPENCV_EXTRA_MODULES_PATH=~/opencv_build/opencv_contrib/modules     -D BUILD_EXAMPLES=OFF -D BUILD_PYTHON_SUPPORT=ON -D BUILD_NEW_PYTHON_SUPPORT=ON  -D OPENCV_ENABLE_NONFREE=ON -DBUILD_opencv_gapi:BOOL=OFF ..

树莓派4B安装OpenCV

（也可按照上面ubuntu的步骤安装。）

sudo apt update
sudo apt install libopencv-dev opencv-python opencv-contrib-python -y
python3 -c "import cv2; print(cv2.__version__)"