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ppmtomap - extract all colors from a portable pixmap
ppmtomap
[-sort] [-square] [ppmfile]
Reads a portable pixmap as input. Produces
a portable pixmap as output, representing a color map of the input file.
All N different colors found are put in an Nx1 portable pixmap. This color
map file can be used as a mapfile for ppmquant or ppmtogif.
- -sort
- Produces a portable pixmap with the colors in some sorted order.
- -square
- Produces a (more or less) square output file, instead of putting all colors
on the top row.
All flags can be abbreviated to their shortest unique prefix.
If you want to use the output file as a mapfile for ppmtogif, you
first have to do a ppmquant 256, since ppmtomap is not limited to 256 colors
(but to 65536).
ppmtogif(1)
, ppmquant(1)
, ppm(5)
Marcel Wijkstra
(wijkstra@fwi.uva.nl).
Copyright (C) 1989 by Jef Poskanzer.
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