[Sugar-devel] De-yellowing page images?

[Chris Ball]

Hi,

   > I'd like to lighten or remove the yellowing from the pages to
   > make the book more attractive.  Maybe leave the text alone and
   > replace everything else with white.  I tried different things
   > with GIMP without much luck.  Any ideas?

Is the book printed in color?  If not, you could simply convert to
greyscale (and optionally adjust brightness/levels afterwards):

   % convert -colorspace Gray source.jpg greyscale.jpg

- Chris.
-- 
Chris Ball   <cjb at laptop.org>
One Laptop Per Child