opencv源码环境搭建

opencv源码环境搭建：https://blog.youkuaiyun.com/weixin_52288941/article/details/120614133
1.安装cmake和依赖库
cmake之前已安装
sudo apt-get install build-essential libgtk2.0-dev libavcodec-dev libavformat-dev libjpeg.dev libtiff5.dev libswscale-dev libjasper-dev 报错
解决方法：
sudo add-apt-repository “deb http://security.ubuntu.com/ubuntu xenial-security main”
sudo apt update
sudo apt install libjasper1 libjasper-dev
再次输入：
sudo apt-get install build-essential libgtk2.0-dev libavcodec-dev libavformat-dev libjpeg.dev libtiff5.dev libswscale-dev libjasper-dev

2.进入opencv目录配置编译环境
cd opencv-3.4.12
mkdir build
cd build
cmake -D CMAKE_BUILD_TYPE=Release -D CMAKE_INSTALL_PREFIX=/usr/local …
sudo make -j4
sudo make install
sudo gedit /etc/ld.so.conf.d/opencv.conf 添加

/usr/local/lib

sudo ldconfig
sudo gedit /etc/bash.bashrc 添加

PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/lib/pkgconfig
export PKG_CONFIG_PATH

source /etc/bash.bashrc
sudo updatedb
pkg-config --modversion opencv