Ubunt16.04 下安装并测试 opencv-4.0 opencv-contrib 模块

• download

  • 需要下载源码

    可以直接去官网下载source code
    也可以直接 git clone 下载最新版本

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

  install

  • 安装 所需依赖

    $ 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 # 处理图像所需的包
    $ sudo apt-get install libavcodec-dev libavformat-dev libswscale-dev libv4l-dev liblapacke-dev
    $ sudo apt-get install libxvidcore-dev libx264-dev # 处理视频所需的包
    $ sudo apt-get install libatlas-base-dev gfortran # 优化opencv功能
    $ sudo apt-get install ffmpeg
    

  • 源码安装

     tar -zxvf opencv.zip
     tar -zxvf opencv-contrib.zip
     mv opencv-contib opencv
     cd opencv
     mkdir build
     cd build
     cmake -D CMAKE_BUILD_TYPE=Release -D CMAKE_INSTALL_PREFIX=/usr/local  -D  OPENCV_EXTRA_MODULES_PATH=../opencv_contrib/modules/ ..  # 最后的两点和空格不要忘记哦 ,时间可能需要一会
     sudo make 
     sudo make install
    

这样是 cmake 好了的标志

opencv 配置

 sudo gedit /etc/ld.so.conf.d/opencv.conf 此时是空的，写进入 /usr/local/lib  //将opencv库添加到路径，从而可以让系统找到
 sudo ldconfig  //使上述配置命令生效
 sudo gedit /etc/bash.bashrc //配置bash 在末尾添加如下命令
  
      PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/lib/pkgconfig 
      export PKG_CONFIG_PATH 
 
 source /etc/bash.bashrc  //使bash配置生效
 sudo updatedb           //更新

测试安装是否成功

  cd opencv-3.4.0/smaples/cpp/example_cmake 
  cmake .  
  make
  ./opencv_example # 测试demo,如果电脑上有摄像头会打开摄像头,如果没有则屏幕上会出现hello opencv的界面