OpenCV在ubuntu下的编译安装

 #include <opencv2/highgui/highgui.hpp>  
    
   
    
 using namespace cv; 
    
  
    
 int main( int argc, char** argv )  
    
 {  
    
     Mat image;  
    
     image = imread( argv[1], 1 );  
    
   
    
     if( argc != 2 || !image.data )  
    
     {  
    
     printf( "No image data \n" );  
    
     return -1;  
    
     }  
    
   
    
     namedWindow( "Display Image", CV_WINDOW_AUTOSIZE );  
    
     imshow( "Display Image", image );  
    
     waitKey(0);  
    
   
    
     return 0;  
    
 }

    # cmake needs this line
    cmake_minimum_required(VERSION 2.8)
    
    # Define project name
    project(display_image)
    
    # Find OpenCV, you may need to set OpenCV_DIR variable
    # to the absolute path to the directory containing OpenCVConfig.cmake file
    # via the command line or GUI
    find_package(OpenCV REQUIRED)
    
    # If the package has been found, several variables will
    # be set, you can find the full list with descriptions
    # in the OpenCVConfig.cmake file.
    # Print some message showing some of them
    message(STATUS "OpenCV library status:")
    message(STATUS "    version: ${OpenCV_VERSION}")
    message(STATUS "    libraries: ${OpenCV_LIBS}")
    message(STATUS "    include path: ${OpenCV_INCLUDE_DIRS}")
    
    if(CMAKE_VERSION VERSION_LESS "2.8.11")
      # Add OpenCV headers location to your include paths
      include_directories(${OpenCV_INCLUDE_DIRS})
    endif()
    
    # Declare the executable target built from your sources
    add_executable(display_image displayImage.cpp)
    
    # Link your application with OpenCV libraries
    target_link_libraries(display_image ${OpenCV_LIBS})