CxImage

Maybe it's wrong in U and V, I think U and V was been exchanged.

RGBQUAD CxImage::RGBtoYUV(RGBQUAD lRGBColor)
{
int Y,U,V,R,G,B;
R = lRGBColor.rgbRed;
G = lRGBColor.rgbGreen;
B = lRGBColor.rgbBlue;

// Y = (int)( 0.257 * R + 0.504 * G + 0.098 * B);
// U = (int)( 0.439 * R - 0.368 * G - 0.071 * B + 128);
// V = (int)(-0.148 * R - 0.291 * G + 0.439 * B + 128);
Y = (int)(0.299f * R + 0.587f * G + 0.114f * B);
U = (int)((B-Y) * 0.565f + 128);
V = (int)((R-Y) * 0.713f + 128);

Y= min(255,max(0,Y));
U= min(255,max(0,U));
V= min(255,max(0,V));
RGBQUAD yuv={(BYTE)V,(BYTE)U,(BYTE)Y,0};
return yuv;
}