安装opencv

1.在下面网站上下载所需版本的源文件



Releases – OpenCV

2.解压并进入该文件夹

3.命令行执行如下指令

mkdir build
cd build
cmake ..
sudo make -j8 #-j表示要多线程编译，8为线程数，可稍微加快一点速度
sudo make install 

卸载opencv

1.找到之前下载并解压出来的opencv文件夹，cd进入该文件夹

2.命令行执行如下指令

cd build
sudo make uninstall
cd ..
sudo rm -r build
sudo rm -r /usr/local/include/opencv2 /usr/local/include/opencv /usr/include/opencv /usr/include/opencv2 /usr/local/share/opencv /usr/local/share/OpenCV /usr/share/opencv /usr/share/OpenCV /usr/local/bin/opencv* /usr/local/lib/libopencv*
##上述语句是为了删除opencv安装的文件夹，可以自己找一找，不一定就是这些位置
cd ..
sudo rm -r 下载的文件名
sudo apt remove opencv-doc opencv-data python-opencv