Martin Nordholts <enselic <at> gmail.com> writes: > > On 07/01/2009 08:21 PM, Emil Assarsson wrote: > > On Mon, Jun 29, 2009 at 9:33 PM, Martin Nordholts<enselic <at> gmail.com> wrote: > > > >> Maybe the RGB -> HSL conversion is buggy? > >> > > > > I don't see it as a bug... it's more of a problem. Gimp uses HSL(?) > > and PhotoShop /seems/ to use CIELAB for these operations. > > > > Any comments on this? > > > > If using a CIE Lab based color space for defining and implementing the > color layer modes gives better looking and more intuitive results, than > that is the color space we shall use. > > A patch that uses CIE Lab (or CIE LCH?) for this when using GEGL would > be much appreciated. > > / Martin > For sure one should use CIELAB. There is a good write up about that color model here: http://www.handprint.com/HP/WCL/color7.html (you will find CIELAB a little over half way down the page. CIELAB, while quite good in itself is also the preferred system for transformation between color spaces - for example going from RGB to CMYK one is best to go RGB > CIELAB > CMYK, thus, not only would you have a top rate color system, you would be set up for top rate transformation functions as well _______________________________________________ gimp-developer-list mailing list gimp-developer-list@xxxxxxxxx http://mail.gnome.org/mailman/listinfo/gimp-developer-list
