1. 下载OpenCV
解压后进入目录并创建build目录
unzip opencv-3.4.12.zip
cd opencv-3.4.12
mkdir build
2. 安装预编译环境
sudo yum -y install epel-release
sudo yum -y install git gcc gcc-c++ cmake3
sudo yum -y install gtk2-devel
sudo yum install -y libpng-devel
sudo yum install