TStdRGBAHelper.ToYCbCr

function TStdRGBAHelper.ToYCbCr(

  const AStd: TYCbCrSTD = YCbCr_JPG;

  ASamplePrecision: Single = 0.5

):TYCbCr; overload;

function TStdRGBAHelper.ToYCbCr(

  LumaRed: Single = 0.299;

  LumaGreen: Single = 0.587;

  LumaBlue: Single = 0.114

):TYCbCr; overload;