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- ppmtopgm(1) PBM Plus ppmtopgm(1)
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- NAME
- ppmtopgm - convert a portable pixmap into a portable graymap
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- SYNOPSIS
- ppmtopgm [ppmfile]
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- DESCRIPTION
- Reads a portable pixmap as input. Produces a portable gray-
- map as output. The quantization formula used is .299 r +
- .587 g + .114 b.
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- Note that there is no pgmtoppm converter because any ppm
- program can read pgm (and pbm) files automagically.
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- QUOTE
- Cold-hearted orb that rules the night
- Removes the colors from our sight
- Red is gray, and yellow white
- But we decide which is right
- And which is a quantization error.
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- SEE ALSO
- ppm(5), pgm(5)
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- AUTHOR
- Copyright (C) 1989 by Jef Poskanzer.
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- Permission to use, copy, modify, and distribute this
- software and its documentation for any purpose and without
- fee is hereby granted, provided that the above copyright
- notice appear in all copies and that both that copyright
- notice and this permission notice appear in supporting docu-
- mentation. This software is provided "as is" without
- express or implied warranty.
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- Printed 5/25/90 23 December 1988 1
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