[纯小白学习OpenCV系列]官方例程01：Load and Display an Image

Version: OpenCV 2.4.9

IDE    : VS2010

OS     : Windows

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Goal
In this tutorial you will learn how to:
• Load an image (using imread)
• Create a named OpenCV window (using namedWindow)
• Display an image in an OpenCV window (using imshow)

Source Code

 #include <opencv2/core/core.hpp>
 #include <opencv2/highgui/highgui.hpp>
 #include <iostream>

 using namespace cv;
 using namespace std;

 int main( int argc, char** argv )
 {
     if( argc != )
     {
      cout <<" Usage: display_image ImageToLoadAndDisplay" << endl;
      return -;
     }

     Mat image;
     image = imread(argv[], CV_LOAD_IMAGE_COLOR);    // Read the file

     if(! image.data )                              // Check for invalid input
     {
         cout <<  "Could not open or find the image" << std::endl ;
         return -;
     }

     namedWindow( "Display window", WINDOW_AUTOSIZE );// Create a window for display.
     imshow( "Display window", image );                   // Show our image inside it.

     waitKey();                                             // Wait for a keystroke in the window
     return ;
 }