Re: [Gimp-print-devel] Dithers in 3.1.3

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

   Date: Wed, 26 Apr 2000 00:25:22 +0200
   From: Thomas Tonino <tt...@bi...>

   If the pixels from this that are lower than a certain constant are
   printed the resulting distribution of pixels is pretty even. It is
   adapted from a well-known method in that during the build a filter is
   applied that punishes pixels that are about 2 pixels or a multiple
   thereof away from the current pixel. Actually, if I prevent my software
   from doing a dot-space-dot at all unless there is no other choice,
   interesting clustery/wormy patterns develop that might be useful for
   laser printers one day - although the worms are very likely to show up
   because of printer mechanism directionality - so for now here is a
   non-wormy one.

It still seemed to generate a fair bit of patterning, in the form of
horizontal lines.  The lines are softer than with the iterated-2
matrix, but it still created a banded effect.  I tried checkerboarding
it, and that created other problems (possibly resonances with some of
the other matrices).

Can you think of any kind of matrix based on hexagonal or octagonal
primitives?  Those will create a more circular effect (octagonal) or a
dense pack effect (hexagonal) which may be less objectionable.

-- 
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