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 | void on_mouse( int event, int x, int y, int flags )
{
    if( !image )
        return;
 
    if( image->origin )
        y = image->height - y;
 
    if( select_object )
    {
        selection.x = MIN(x,origin.x);
        selection.y = MIN(y,origin.y);
        selection.width = selection.x + CV_IABS(x - origin.x);
        selection.height = selection.y + CV_IABS(y - origin.y);
 
        selection.x = MAX( selection.x, 0 );
        selection.y = MAX( selection.y, 0 );
        selection.width = MIN( selection.width, image->width );
        selection.height = MIN( selection.height, image->height );
        selection.width -= selection.x;
        selection.height -= selection.y;
 
    }
 
    switch( event )
    {
    case CV_EVENT_LBUTTONDOWN:
        origin = cvPoint(x,y);
        selection = cvRect(x,y,0,0);
        select_object = 1;
        break;
    case CV_EVENT_LBUTTONUP:
        select_object = 0;
        if( selection.width > 0 && selection.height > 0 )
            track_object = -1;
#ifdef _DEBUG
    printf("\n # تَ±êµؤر،شٌاّسٍ£؛");
    printf("\n   X = %d, Y = %d, Width = %d, Height = %d",
        selection.x, selection.y, selection.width, selection.height);
#endif
        break;
    }
}
 
 
CvScalar hsv2rgb( float hue )
{
    int rgb[3], p, sector;
    static const int sector_data[][3]=
        {{0,2,1}, {1,2,0}, {1,0,2}, {2,0,1}, {2,1,0}, {0,1,2}};
    hue *= 0.033333333333333333333333333333333f;
    sector = cvFloor(hue);
    p = cvRound(255*(hue - sector));
    p ^= sector & 1 ? 255 : 0;
 
    rgb[sector_data[sector][0]] = 255;
    rgb[sector_data[sector][1]] = 0;
    rgb[sector_data[sector][2]] = p;
 
#ifdef _DEBUG
    printf("\n # Convert HSV to RGB£؛");
    printf("\n   HUE = %f", hue);
    printf("\n   R = %d, G = %d, B = %d", rgb[0],rgb[1],rgb[2]);
#endif
 
    return cvScalar(rgb[2], rgb[1], rgb[0],0);
}
 
int main( int argc, char** argv )
{
    CvCapture* capture = 0;
    IplImage* frame = 0;
 
   if( argc == 1 || (argc == 2 && strlen(argv[1]) == 1 && isdigit(argv[1][0])))
        capture = cvCaptureFromCAM( argc == 2 ? argv[1][0] - '0' : 0);
    else if( argc == 2 )
       capture = cvCaptureFromAVI( argv[1] );
 
    if( !capture )
    {
        fprintf(stderr,"Could not initialize capturing...\n");
        return -1;
    }
 
    printf( "Hot keys: \n"
        "\tESC - quit the program\n"
        "\tc - stop the tracking\n"
        "\tb - switch to/from backprojection view\n"
        "\th - show/hide object histogram\n"
        "To initialize tracking, select the object with mouse\n" );
 
    //cvNamedWindow( "Histogram", 1 );
    cvNamedWindow( "CamShiftDemo", 1 );
 
    cvSetMouseCallback("CamShiftDemo",on_mouse,void*); // on_mouse 
 
    cvCreateTrackbar( "Vmin", "CamShiftDemo", &vmin, 256, 0 );
    cvCreateTrackbar( "Vmax", "CamShiftDemo", &vmax, 256, 0 );
    cvCreateTrackbar( "Smin", "CamShiftDemo", &smin, 256, 0 ); | 
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