George Vandenberghe on wrote...
| As someone who doesn't do much with images anymore you should take my
| advice cautiously. However the PBM file format is a simple way
| to represent black/white images one bit per pixel. The only way
| to get grayscale with PBM is by varying the density of black and white
| points.
| Look at the dithering options in convert for possible assistance. However
| dithering does point density manipulation and lines are a problem I've not
| worked with.
|
For dithering options, and expecially the later versions of IM that
allow user defined dithering threshold maps, see..
http://imagemagick.org/Usage/quantize/#ordered-dither
I did a lot of work to get this up and running, and also allow multiple
color levels. though black and white dithering is still the default.
convert logo.png -colorspace Gray -ordered-dither o8x8 logo_bw_o8x8.gif
Anthony Thyssen ( System Programmer ) <[EMAIL PROTECTED]>
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A Real Kiter doesn't get annoyed with line tangles. Rather, he finds
that sorting them is a relaxing passtime. Line tangles involving many
kites are a social occasion.
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Anthony's Home is his Castle http://www.cit.gu.edu.au/~anthony/
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