On Sun, May 31, 2009 at 10:36 PM, Robert Krawitz <rlk@xxxxxxxxxxxx> wrote:
> Omari Stephens wrote:
> - This requires more computation to use because of the "odd"
> shape of the space of valid coordinates. That is, not all
> valid coordinates are valid colors.
>
> What I don't like about this is that it leaves a large fraction (well
> over half) of the color space unused and functionally meaningless. I
> agree that this representation is more accurate, but functionally it
> seems more difficult to work with. Think about the UI implications.
>
> - HSL and HSV are in wide use, and this is neither HSL nor HSV
> (though it's just a coordinate transformation away from both
> HSL and RGB)
>
> It's a simple coordinate transformation from HSL:
>
> H' = H
> S' = S * (1 - ((|L - .5|) * 2))
> L' = L
>
> but it's not any simpler than RGB->HSL.
The colors selected in this manner will likely be used in a different
color space than the one they are selected in anyways. This means that
undefined regions of the colorspace and computational complexity are
only a concern of the color picker interface. CIE Lch is another
options that can be considered. I haven't studied it but suspect that
the current computation of Lightness has crude 8bit/gamma assumptions
in it.
/Øyvind K.
--
«The future is already here. It's just not very evenly distributed»
-- William Gibson
http://pippin.gimp.org/ http://ffii.org/
_______________________________________________
Gimp-developer mailing list
Gimp-developer@xxxxxxxxxxxxxxxxxxxxxx
https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-developer
