opencv安装
1.1 安装依赖
sudo apt-get update
sudo apt-get install build-essential
sudo apt-get install cmake git libgtk2.0-dev pkg-config libavcodec-dev libavformat-dev libswscale-dev
sudo apt-get install python-dev python-numpy libtbb2 libtbb-dev libjpeg-dev libpng-dev libtiff-dev libjasper-dev libdc1394-22-dev
1.2 下载并解压opencv及对应版本opencv_contrib源码包，以opencv4.5.2为例
wget https://github.com/opencv/opencv/archive/4.5.2.zip -O opencv-4.5.2.zip
wget https://github.com/opencv/opencv_contrib/archive/refs/tags/4.5.2.zip -O opencv_contrib-4.5.2.zip
unzip opencv-4.5.2.zip
unzip opencv_contrib-4.5.2.zip
1.3 编译安装
mkdir opencv-4.5.2/build && cd opencv-4.5.2/build
cmake -D CMAKE_BUILD_TYPE=Release -D BUILD_opencv_world=ON -D OPENCV_DOWNLOAD_MIRROR_ID=gitcode \
-D OPENCV_ENABLE_NONFREE=ON -D BUILD_TIFF=ON -D OPENCV_GENERATE_PKGCONFIG=ON \
-D CMAKE_INSTALL_PREFIX=~/opencv_200dk/opencv_install \
-D OPENCV_EXTRA_MODULES_PATH=../../opencv_contrib-4.5.2/modules ..
make -j8
make install
关键编译选项：
- BUILD_opencv_world # 如果为ON，编译只会生成一个整体的链接库，如果为OFF会生成各个模块的链接库
- CMAKE_INSTALL_PREFIX # 编译安装的路径，执行make install后opencv会被安装到CMAKE_INSTALL_PREFIX路径下
- OPENCV_ENABLE_NONFREE # 如需编译xfeatures2d等不受专利保护的算法，需要将其置为ON
- OPENCV_EXTRA_MODULES_PATH # 扩展算法包模块的路径，需指定为解压后opencv_contrib包的modules目录
在编译目录下执行cmake -LH可查看所有编译选项说明和其默认设置