void yiq2rgb(double y, double i, double q, Pixel pixel)
{
double dr, dg, db;
#if YUV
dr = (y + 1.140 * q);
dg = (y - 0.395 * i - 0.581 * q);
db = (y + 2.032 * i);
#else
dr = (y + 0.956 * i + 0.621 * q);
dg = (y - 0.272 * i - 0.647 * q);
db = (y - 1.105 * i + 1.702 * q);
#endif
pixel.Red = (int) (255 * dr);
pixel.Green = (int) (255 * dg);
pixel.Blue = (int) (255 * db);
pixel.Clamp0255();
}