On Mon, Apr 21, 2014 at 1:16 PM, Elle Stone <ellestone@xxxxxxxxxxxxxxxxxxxx> wrote: > On 04/21/2014 07:07 AM, Teo Mazars wrote: >> Hmm, I understand, then the default black-to-white gradient would be non >> perceptually linear, which is more surprising than the color-to-color >> gradient. I think I am now convinced this is correct, but it will probably >> be puzzling to use. >> >> BTW, "gradient" is not such a good example because it's not related to >> chromaticities, "Invert" would be a better one. > > I don't understand what you are trying to say. How is drawing a gradient > from most saturated red to most saturated green in any given color space not > related to chromaticities? Picking the gradient color stops (including start and end) colors can be considered as separate from the color space the rendering process and interpolation is done in. > The color space chromaticities are what determine the most saturated > possible colors in any given color space. > > Aren't the negative RGB values required to draw a gradient in unbounded mode > sRGB from Rec. 2020 reddest red to Rec. 2020 greenest green exactly what > makes the gradient so horribly wrong when drawn in perceptual rather than > linear? It's the effect of the perceptual TRC that sends the "out of bounded > sRGB gamut" colors to strange places. This might be an argument that do the _interpolation_ by default in for instance CIE Lab instead of sRGB. /pippin _______________________________________________ gimp-developer-list mailing list List address: gimp-developer-list@xxxxxxxxx List membership: https://mail.gnome.org/mailman/listinfo/gimp-developer-list List archives: https://mail.gnome.org/archives/gimp-developer-list
