ubuntu opencv安装

安装依赖

1. sudo apt-get install build-essential libgtk2.0-dev libjpeg-dev  libtiff5-dev libopenexr-dev libtbb-dev
2. sudo apt-get install libavcodec-dev libavformat-dev libswscale-dev libgtk-3-dev libgstreamer1.0-dev libgstreamer-plugins-base1.0-dev pkg-config

mkdir build
cd build

cmake .. -D CMAKE_BUILD_TYPE=Release -D CMAKE_INSTALL_PREFIX=/usr/local/opencv4.5.4 -D OPENCV_GENERATE_PKGCONFIG=ON

sudo make -j8

export PKG_CONFIG_PATH=/usr/local/opencv4.5.4/lib/pkgconfig  
export LD_LIBRARY_PATH=/usr/local/opencv4.5.4/lib

fatal error: opencv2/opencv_modules.hpp: No such file or directory(linux系统,opencv4)

sudo ln -s /usr/local/include/opencv4 /usr/include/

sudo ln -s /usr/local/include/opencv4/opencv2 /usr/include/