/**
* Get Q from RGB in YIQ color model
*
* @param \Sokil\Image\ColorModel\Rgb $rgb
* @return int Q
*/
public static function getQFromRgb(Rgb $rgb)
{
return floor($rgb->getRed() * 0.211 - $rgb->getGreen() * 0.522 + $rgb->getBlue() * 0.311);
}
