说明：  CIE中各色域空间的转换，例如：XYZ到RGB，XYZ到Luv，RGB到XYZ，Lab到LHC，RGB到HSV，HSV到RGB
(CIE were colored domain space conversion, for example : XYZ to RGB, XYZ to Luv, to XYZ RGB, Lab of the LHC, RGB to HSV, HSV to RGB, etc.)