LinuxQuestions.org - OpenCV commands

How to load and display image;

Code:

/* usage: prog <image_name> */

#include "cv.h"

#include "highgui.h"



int main( int argc, char** argv )

{

    IplImage* img;

    if( argc == 2 && (img = cvLoadImage( argv[1], 1)) != 0 )

    {

        cvNamedWindow( "Image view", 1 );

        cvShowImage( "Image view", img );

        cvWaitKey(0); // very important, contains event processing loop inside

        cvDestroyWindow( "Image view" );

        cvReleaseImage( &img );

        return 0;

    }

    return -1;

}

This is just one of the examples that you can find here.
Lots of other things OpenCV related are there.