Re: Chrominance and Luminance

MyName wrote:

> I found this formula to calculate Luminance e Chrominance
> L = (R + G + B) /3
> C = { R-L, G - L, B- L}
> what do negative values mean ?
> How can i split an RGB image into its Luminance and Chrominance
> componenet? A RGB image is fully described only by this two compoments?

I'm not sure but I think you also need some kind of saturation value to
fully describe a RGB colour. Maybe you should use the HSV (Hue saturation 
value) color model. I think the conversion between RGB and HSV is described
in the FAQ of comp.lang.algorithms. Or just google for that.

-- 
Dipl.-Inform. Hendrik Belitz
Central Laboratory of Electronics
Research Center Juelich