[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 != 2)
    {
     cout <<" Usage: display_image ImageToLoadAndDisplay" << endl;
     return -1;
    }

    Mat image;
    image = imread(argv[1], 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 -1;
    }

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

    waitKey(0);                                             // Wait for a keystroke in the window
    return 0;
}