ubuntu 18.04编译安装opencv 4.3.0

1. 下载opencv安装包

官网地址：https://opencv.org/releases/

2. 安装依赖

sudo apt-get install cmake git libgtk2.0-dev pkg-config  libavcodec-dev libavformat-dev libswscale-dev
sudo apt-get install libtbb2  libtbb-dev libjpeg-dev libpng-dev libtiff-dev libdc1394-22-dev
sudo add-apt-repository "deb http://security.ubuntu.com/ubuntu xenial-security main"
sudo apt-get update
sudo apt install libjasper1 libjasper-dev 

3. 编译安装

mkdir build && cd build
cmake .. -DWITH_QT=ON -DBUILD_TIFF=ON -DOPENCV_GENERATE_PKGCONFIG=ON -DCMAKE_INSTALL_PREFIX=/usr/local
sudo make -j16
sudo make install

如果出现CMAKE_PREFIX_PATH doesn't help CMake in finding Qt5错误，则在终端中输入apt-get install qtbase5-dev qtdeclarative5-dev安装QT安装包以解决问题。

4. 配置环境变量

pkg-config --cflags opencv4
sudo gedit /etc/ld.so.conf.d/opencv.conf

输入

/usr/local/lib