Fernando Cacciola wrote:
But is not even that. You are probably missing the fact that the "GIL element under discussion", which I suggested not to be documented as a color space, isn't a tuple of numbers at all. It's a tag. That is, the tuple of number which holds the component values is the pixel<> class. Incidentally, if one were to follow that wikipedia article, would conclude that pixel<> (being a tuple of color component values) would have to be renamed color_model<>, or just color<>, since model is implied in computer programs. And that's what I suggested (but I can see that the class is used in certain contexts were calling it color<> is wrong.)
The thing that is documented as being a color space is the a tag class that is used inside pixel<>. That tag is just there to bind each tuple element to the corresponding component in a given color model so that the resulting thing, the "tagged pixel" can be considered as an instance of a color model. So IMO that tag class is representing a format.
Ok, those are good points (except for the bit where you are disconnecting color-space from color-model). I must admit, I missed that _tag_ thing. Cheers, -- Joel de Guzman http://www.boost-consulting.com http://spirit.sf.net