Re: [boost] GIL Review

From: Joel de Guzman (joel_at_[hidden])
Date: 2006-11-01 02:35:07

Matt Gruenke wrote:
> Joel de Guzman wrote:

>> I disagree. A color space is a tuple of numbers. It is concerned with
>> data and layout as far as I can see. That is the very definition of
>> "tuple".
>>  
> That's a color (or pixel value).
> 
> A color space provides the semantics of these numbers, possibly 
> including how they are converted to other color spaces.  This may 
> include its basis, CIE primaries, transfer function, gamut, etc.  (For 
> more information, here's a good starting point: 
> http://www.poynton.com/notes/colour_and_gamma/ColorFAQ.html )
> 
> A pixel format establishes the mapping between channels of an image 
> (i.e. color, pixel value, etc.) and components of a color space.

Now I see the confusion. There are overlaps in the definition of
colors and color-spaces of course. Did you think they were orthogonal?
See: http://tinyurl.com/18r for the definition of color-spaces.

Regards,
-- 
Joel de Guzman
http://www.boost-consulting.com
http://spirit.sf.net