>In indexed mode, the color of a pixel in the image (in all layers) is >taken from a "color map". Since the index in the color map is a 8-bit >byte, you can only have 256 colors (across all layers). When you >import >another image, its colors are approximated with the 256 colors in the >current colormap. The first victims of this color shortage are the >anti-aliasing pixels along the edges of things that are a blend of the >two colors in various (and numerous) proportions(*) and the edges >become >jagged. > >(*) Experiment: Take a blank image, add a black text layer, and merge >it >down to obtain one single layer with black text over white. Then Go to >Colors>Info>Color cubes analysis. You will find much more than two >colors... these are the 250 shades of grays used in the edge pixels. >You >can start Color>Posterize and see what happend to the text outline >when >you reduce the number of colors.
Thanks, yes, I did the experiment and I saw the change now. -- bsmile (via www.gimpusers.com/forums) _______________________________________________ gimp-user-list mailing list List address: gimp-user-list@gnome.org List membership: https://mail.gnome.org/mailman/listinfo/gimp-user-list List archives: https://mail.gnome.org/archives/gimp-user-list
