View Single Post
Old 10-06-2013, 03:21 AM   #24
Jellby
frumious Bandersnatch
Jellby ought to be getting tired of karma fortunes by now.Jellby ought to be getting tired of karma fortunes by now.Jellby ought to be getting tired of karma fortunes by now.Jellby ought to be getting tired of karma fortunes by now.Jellby ought to be getting tired of karma fortunes by now.Jellby ought to be getting tired of karma fortunes by now.Jellby ought to be getting tired of karma fortunes by now.Jellby ought to be getting tired of karma fortunes by now.Jellby ought to be getting tired of karma fortunes by now.Jellby ought to be getting tired of karma fortunes by now.Jellby ought to be getting tired of karma fortunes by now.
 
Jellby's Avatar
 
Posts: 7,560
Karma: 20150435
Join Date: Jan 2008
Location: Spaniard in Sweden
Device: Cybook Orizon, Kobo Aura
Quote:
Originally Posted by Tex2002ans View Post
I just thought of this. Perhaps as a workaround, the image can be reduced to 17 colors instead.
That could work if you don't want to play with the files too much. What I sometimes do is:

GIMP: Reduce number of colors with "Posterize". Depending on the type of image, I reduce to between 8 and 64 colors. Save as PNG.

And then the magic command:

Code:
pngcrush -bit_depth 8 -force
to optimize the PNG compression, at the same time enforcing an 8-bit final file.
Jellby is offline   Reply With Quote