安装依赖项

sudo apt install -y g++
sudo apt install -y cmake
sudo apt install -y make
sudo apt install -y wget unzip

安装opencv依赖库

sudo apt-get install build-essential libgtk2.0-dev libgtk-3-dev libavcodec-dev libavformat-dev libjpeg-dev libswscale-dev libtiff5-dev

下载OpenCV 4.5.0源文件

# 安装4.5.0版本
wget -O opencv.zip https://github.com/opencv/opencv/archive/4.5.0.zip
# 安装最新版本
wget -O opencv.zip https://github.com/opencv/opencv/archive/master.zip

解压，重命名

sudo unzip opencv.zip
sudo mv opencv4.5.0 opencv

创建文件夹并进入，加权限

cd opencv
mkdir build
sudo chmod -R 777 ./*
cd build

使用cmake配置opencv：

cmake -D CMAKE_BUILD_TYPE=Release -D OPENCV_GENERATE_PKGCONFIG=YES ..

编译

make -j4

安装

sudo make install