[Openicc] Drop size calibration

[Robert Krawitz]

   Date: Tue, 29 Jan 2008 10:25:26 +0100 (CET)
   From: Kai-Uwe Behrmann <ku.b at gmx.de>

   Am 29.01.08, 10:01 +0100 schrieb Gerhard Fuernkranz:

   > Robert Krawitz wrote:
   > > I need to find some time to investigate Raph Levien's EvenBetter Screening. I'm not certain, but this may be multi-level as well as well as handling multiple inks.
   > 
   > Oh, and I was always believing that Gutenprint's "Even Tone" screening
   > is already yet another implementation of Raph Levien's algorithm.
   > Obviously I was wrong...
   >  
   > > The code's a bit convoluted because it's vector-optimized (and because it's Ghostscript-based -- I always find Ghostscript code harder to figure out).
   > >   
   > 
   > Raph Levien's original code seems to be pretty easy to use
   > (independently of GS). Create the EvenBetter object with
   > even_better_new(), then call even_better_line() for each scan line,
   > feeding the continuous color data of the scan line into the engine and
   > getting the dithered pattern out. But there are a couple of parameters
   > too, which can be / need to be tuned.

   I have the feeling there was a license issue (GPL).

Gutenprint is GPL also.  I've asked them to clarify exactly which
version(s) of the GPL -- Gutenprint is currently GPL2+.

-- 
Robert Krawitz                                     <rlk at alum.mit.edu>

Tall Clubs International  --  http://www.tall.org/ or 1-888-IM-TALL-2
Member of the League for Programming Freedom -- mail lpf at uunet.uu.net
Project lead for Gutenprint   --    http://gimp-print.sourceforge.net

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