Ubuntu 20.04源码安装opencv 4.5.0
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
