Re: [Gimp-print-devel] Dither problem with stc740

[Robert L K. <rl...@al...>]

   Date: Wed, 19 Apr 2000 19:35:13 +0100
   From: Dave Hill <da...@mi...>

   I'm not sure that I like either of the new dithers, the "screen"
   effect you get on photos is more noticeable than on the windoze
   driver output.

OK.  I'm going to code up something that uses a random dither, in
addition to the ordered and "hybrid" dithers.  It's pretty easy to do,
actually; just use a random number in place of the matrix lookup.

I noticed that the ordering is more obvious -- and more obnoxious --
at low resolution (360 dpi) than at high resolutions (720 and
1440x720).  So one option would be to default to some kind of more
pure F-S dithering at low resolutions, but use one of the screen
variants at high resolution.

Another thing that's jumping out at me is the need to decide on which
color to print very independently of whether to print at all.
Otherwise all manner of weird things happen.  Not really all that
surprising.

-- 
Robert Krawitz <rl...@al...>      http://www.tiac.net/users/rlk/

Tall Clubs International  --  http://www.tall.org/ or 1-888-IM-TALL-2
Member of the League for Programming Freedom -- mail lp...@uu...
Project lead for The Gimp Print --  http://gimp-print.sourceforge.net

"Linux doesn't dictate how I work, I dictate how Linux works."
--Eric Crampton