docs: public static void rgbToYCbCr( int r , int g , int b , byte yuv[] ) {
  		// multiply coefficients in book by 1024, which is 2^10
  		yuv[0] = (byte)((( 187*r + 629*g + 63*b ) >> 10) + 16);
  		yuv[1] = (byte)(((-103*r - 346*g + 450*b) >> 10) + 128);
  		yuv[2] = (byte)((( 450*r - 409*g - 41*b ) >> 10) + 128);
  	}