[Gimp-print-devel] Dithering

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

I have some new dithering code that I've just committed (it's the code
I've been yakking about lately).  This code seems to give much more
even results, better color matching, and less ink consumption.  It
probably works best for printers with variable dot sizes/ink types,
such as the Epson Stylus Photo series (6 colors, and in some cases
variable dot sizes) and the Stylus Color 740 and 900.  It's certainly
a lot easier to tune, and it's possible to actually understand what's
going on.  I've slapped on two tags "dither2-premerge" and
"dither2-postmerge" in case people dislike it and we want to rip it
out easily.

My tests are a little suspect right now because the cartridge in my
printer right now is contaminated with alcohol that I used to try to
clean it, so the colors are all washed out.  Despite that, however,
it's promising enough so I want more people to get a shot at it.

Note that this doesn't preclude using the Even Toned screening
algorithm, or anything else.  I want to have different dithering
algorithms available for different purposes (e. g. Even Tone doesn't
currently support variable dot sizes).  That's why I've been pushing
for alternate dithering algorithm support.

I have a pretty good backlog of stuff here -- look at rinkj, document
how to add a new family of printers, write a script to generate a
change log from the CVS commit messages.  I need to take a break from
coding long enough to get to all this.  I know I won't get to it all,
though.  The family illness is still there, and won't be entirely
going away any time soon.

-- 
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