static double redGrayscaleFactor() {return s_dRedGrayscaleFactor;}
static double greenGrayscaleFactor() {return s_dGreenGrayscaleFactor;}
static double blueGrayscaleFactor() {return s_dBlueGrayscaleFactor;}
static double redGrayscaleFactor() {return s_dRedGrayscaleFactor;}
static double greenGrayscaleFactor() {return s_dGreenGrayscaleFactor;}
static double blueGrayscaleFactor() {return s_dBlueGrayscaleFactor;}