[gs-bugs] [Bug 689633] Floyd-Steinberg dithering for tiffg3, tiffg32d, and tiffg4

[bugs.ghostscript.com-bugzilla-daemon at ghostscript.com]

http://bugs.ghostscript.com/show_bug.cgi?id=689633





------- Additional Comments From ray.johnston at artifex.com  2007-12-31 13:26 -------
Now I must apologize for seeing the one mistake and missing the other.

The ht_ccsto.ps is a replacement for the (too dark) one in the lib/ directory, but
when you invoke Ghostscript, you need to use 'stocht.ps' which loads the
ht_stocht.ps halftone resource and defines it as the DefaultHalftone.

The 'ht_ccsto.ps' file only defines a Halftone Resource 'StochasticDefault'
which stocht.ps uses.

Please try:

jpeg2ps -r 200 -q original.jpg | \
  gs -q -sDEVICE=tiffg3 -dNOPAUSE -dBATCH -r204x196 \
  -sOutputFile=final.tif stocht.ps -c "<< /HalftoneMode 1 >> setuserparams" -





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