Jef Poskanzer <jef@ee.lbl.gov> writes:

...

Well, try using Stego on an 8 bit PICT, and see for yourself! It looks like a >slight< random noise filter was applied to the image - plausibly the sort of trouble one would have with a slightly imperfect scanner.

Maybe colormaps on the Mac are always sorted? That would minimize the visible effect of +-1 changes in index value.

Colormaps on the Mac are not "always" anything, since creating custom pallettes is trivial, but yes, they usually are. For best stegonagraphy in 8-bit, I would recomend using the system greyscale pallette. (Greyscale images *almost always* sorted on the mac.) _______________________________________________________________________ Geoff Dale -- Cypherpunk/Extropian -- Plastic Beethoven AnarchyPPL - Anarch (Adjudicator) ExI-Freegate Virtual Branch Head plaz@netcom.com 66 Pyramid Plaza plaz@io.com Freegate, Metaverse@io.com 7777 "Subvert the domination paradigm!"