ตัวอย่างการติดต่อกับกล้องของOpenCV

#include <iostream>
using namespace std;

#include <cxcore.h>
#include <highgui.h>

#define CAMERA_ID   0
#define DISPLAY_WINDOW_NAME   "captured image"

int main( int argc, char **argv )
{
    // create camera capture object.
    CvCapture *pCapture = NULL;
    pCapture = cvCreateCameraCapture( CAMERA_ID );
    if ( pCapture == NULL )
        {
            cout << "ERROR: Failed to open camera" << endl;
            return EXIT_FAILURE;
        }

    // create window for displaying captured image.
    cvNamedWindow( DISPLAY_WINDOW_NAME );

    // capture and display
    //   until user hit any key of the keyboard
    IplImage *pImage = NULL;
    do
    {
        pImage = cvQueryFrame( pCapture );
        cvShowImage( DISPLAY_WINDOW_NAME, pImage );
    } while ( cvWaitKey( 1 ) == -1 );

    // before exiting the program,
    //   destroy the display window and
    //   release the cameara capture object.
    cvDestroyWindow( DISPLAY_WINDOW_NAME );
    cvReleaseCapture( &pCapture );
    return 0;
}