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ppmtomap - extract all colors from a portable pixmap |
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ppmtomap [-sort] [-square] [ppmfile] |
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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. |
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-sort |
Produces a portable pixmap with the colors in some sorted order. |
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-square |
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Produces a (more or less) square output file, instead of putting all colors on the top row. |
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All flags can be abbreviated to their shortest unique prefix. |
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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). |
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ppmtogif(1), ppmquant(1), ppm(5) |
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Marcel Wijkstra (wijkstra@fwi.uva.nl). Copyright (C) 1989 by Jef Poskanzer. |