CentOS7安装opencv

1. 安装前的准备

   yum -y install git
   yum -y install gcc
   yum -y install numpy
   yum -y install gcc-c++
   yum -y install tbb-devel
   yum -y install gtk2-devel
   yum -y install epel-release
   yum -y install eigen3-devel
   yum -y install libv4l-devel
   yum -y install libpng-devel
   yum -y install jasper-devel
   yum -y install openexr-devel
   yum -y install libwebp-devel
   yum -y install libtiff-devel 
   yum -y install libdc1394-devel
   yum -y install qt5-qtbase-devel
   yum -y install libjpeg-turbo-devel
   yum -y install boost boost-thread boost-devel
   yum -y install boost boost-thread boost-devel
   yum -y install python python-devel python-pip
   yum -y install python34 python34-devel python34-pip python34-numpyx
   yum -y install freeglut-devel mesa-libGL mesa-libGL-devel
   rpm                 --import     https://note.so1234.top/network/opencv/RPM-GPG-KEY-nux.ro
   rpm                 -Uvh         https://note.so1234.top/network/opencv/nux-dextop.noarch.rpm
   yum -y localinstall --nogpgcheck https://note.so1234.top/network/opencv/rpmfusion-free-7.noarch.rpm
   yum -y localinstall --nogpgcheck https://note.so1234.top/network/opencv/rpmfusion-nonfree-7.noarch.rpm
   

2. 安装ffmpeg

3. 安装gcc10.1

4. 安装cmake3.16

5. 安装python3.6

6. 安装opencv

   cd /root
   git clone https://github.com/opencv/opencv.git
   git clone https://github.com/opencv/opencv_contrib.git
   mkdir /root/opencv/build
   cd /root/opencv/build
   
   cmake \
   -D CMAKE_INSTALL_PREFIX=/usr/local/opencv \
   -D OPENCV_EXTRA_MODULES_PATH=/root/opencv_contrib/modules\
   /root/opencv
   
   make -j$(nproc)
   make install
   opencv_version
   echo '/usr/local/lib' > /etc/ld.so.conf.d/opencv.conf
   

7. 测试C程序

   mkdir /root/test
   cd /root/test
   vim DisplayImage.cpp
   
   #include <stdio.h>
   #include <opencv2/opencv.hpp>
   using namespace cv;
   int main(int argc, char** argv )
   {
       if ( argc != 2 )
       {
           printf("usage: DisplayImage.out <Image_Path>\n");
           return -1;
       }
       Mat image;
       image = imread( argv[1], 1 );
       if ( !image.data )
       {
           printf("No image data \n");
           return -1;
       }
       namedWindow("Display Image", WINDOW_AUTOSIZE );
       imshow("Display Image", image);
       waitKey(0);
       return 0;
   }
   
   ESC
   :wq
   
   vim CMakeLists.txt
   
   set(CMAKE_CXX_STANDARD 14)
   cmake_minimum_required(VERSION 2.8)
   project(DisplayImage)
   find_package(OpenCV REQUIRED)
   include_directories(${OpenCV_INCLUDE_DIRS})
   add_executable(DisplayImage DisplayImage.cpp)
   target_link_libraries(DisplayImage ${OpenCV_LIBS})
   
   ESC
   :wq
   
   cmake /root/test
   
   ./DisplayImage /xxx/test.jpg