OpenCV

การติดต่อกับกล้องโดย OpenCV นั้นจะใช้ชุดคำสั่งจาก highgui ซึ่งมีตัวอย่างดังนี้

#include 
using namespace std;
#include 
#include 
#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;
}