【Ubuntu】安装OpenCV

一、安装依赖库

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

二、下载OpenCV压缩包

下载地址：https://github.com/opencv/opencv/releases，版本自选，直接下载 zip 就可以了

三、编译

1、解压

2、进入解压目录，新建文件夹

两种方式

1）命令行新建

mkdir build
cd build

2）右键新建

3、cmake

sudo cmake ..

4、编译

sudo make
sudo make install 

5、添加环境变量

sudo /bin/bash -c 'echo "/usr/local/lib" > /etc/ld.so.conf.d/opencv.conf'
sudo ldconfig

四、配置完成

如果报错：error while loading shared libraries: libopencv_highgui.so.3.4: cannot open shared object file: No such file or directory，是没有添加环境变量

五、参考

https://blog.youkuaiyun.com/luanpeng825485697/article/details/81181825

https://github.com/pjreddie/darknet/issues/382