注意;要退出conda的虚拟环境

依赖 

1.更新系统

sudo apt-get update
sudo apt-get upgrade

2.安装相关的依赖

sudo apt-get install build-essential cmake git libgtk2.0-dev pkg-config libavcodec-dev libavformat-dev libswscale-dev
sudo apt-get install libjpeg-dev libpng-dev libtiff-dev libjasper-dev libatlas-base-dev gfortran

这里可能遇到报错

 debug

sudo add-apt-repository "deb http://security.ubuntu.com/ubuntu xenial-security main"
sudo apt update
sudo apt install libjasper1 libjasper-dev

然后继续 

OpenCV

3.下载OpenCV

git clone https://github.com/opencv/opencv.git

4.进入到OpenCV所在的路径

cd opencv
mkdir build

编译 

5.编译安装
依次输入如下命令：

cd build
cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local ..
make -j4

这里的make报错 

 跟conda的虚拟环境有关，需要退出(删除之前的build文件夹重新cmake和make)

linux下安装opencv（c++）的一些踩坑问题_⁤维维诺诺x的博客-CSDN博客

然后继续

这里编译成功

 

sudo make install

然后就安装依赖成功了

sudo nano /etc/dphys-swapfile
sudo /etc/init.d/dphys-swapfile stop
sudo /etc/init.d/dphys-swapfile start
g++ -o test_opencv test_opencv.cpp `pkg-config opencv --cflags --libs`
./test_opencv

references

Ubuntu 20.04下搭建C++ & OpenCV 4.6.0 & cmake编译 - 知乎