Re: [Gimp-print-devel] New dither codes

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

   Date: Fri, 28 Apr 2000 22:53:41 +0100
   From: Thorsten Schnier <tho...@sc...>

   hybrid FS and adaptive hybrid: some artefacts in a ligt area next to a
   dark one: I get a row of black pixels just next to the dark area.

The hybrid algorithms are beginning to look like real non-starters.
And I had such high hopes for them!  Sigh.

   random FS and adaptive random: zigzag lines in dark-grey areas (greenish
   and reddish ones). 

What settings are you using (in particular, photograph vs. line art
vs. solid color)?

   I don't see much difference between the adaptive and non-adaptive
   versions

You'll see a difference in very pale areas, but that's it.

   720dpi microweave:

   Only tested adaptive random, same artefacts in dark areas, only
   stronger, probably because the image in total is noticeable darker (I
   didn't adjust the controls). Light skintones are better, darker ones
   look very greyish (I expect some experimentation with the levels will
   help here). 

For some reason, the 360 dpi prints seem to be much lighter on every
printer.  Try bumping up the density to 1.5 at 360 dpi and see if it
helps.  How fast was this mode?

Try setting the saturation to 1.2~1.4.

   720 softweave:
   "broken", the image looks very blurry, bottom edge of the image looks
   'broken' (i.e as if you abort a print and it has only printed some of
   the paths), noticeable banding, looks like some layer is printed a few
   pixels too low.

Hmm.  Did the print try to continue on another page?  I'd really like
to see what that's like.

Try 720 highest quality.  720 softweave will show a lot of banding.