一种linux下由源码安装各版本opencv及opencv_contrib方法

1.下载源玛

由opencv官网或github下载源码

例如本次下载的安装的版本是3.4.11

官网Releases - OpenCV

githubGitHub - opencv/opencv at 3.4.11

git clone -b 3.4.11 https://github.com/opencv/opencv.git opencv-3.4.11

 下载opencv_contrib源码，并解压到opencv目录，不需要的可以跳过

git clone -b 3.4.11 https://github.com/opencv/opencv_contrib opencv_contrib-3.4.11

2.cmake分析

sudo mkdir /usr/local/cv34
cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local/cv34 ..	 
make -j8		  				//根据自己电脑的核数，一般开8核，有16核的建议用 -j12
sudo make install				//开始配置opencv到cv34下