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- ppmtopgm(1) AMIGA (23 December 1988) 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
- graymap as output. The quantization formula used is .299 r
- + .587 g + .114 b.
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- Note that although there is a pgmtoppm program, it is not
- necessary for simple conversions from pgm to ppm, because
- any ppm program can read pgm (and pbm ) files automagically.
- pgmtoppm is for colorizing a pgm file. Also, see ppmtorgb3
- for a different way of converting color to gray.
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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
- pgmtoppm(1), ppmtorgb3(1), rgb3toppm(1), ppm(5), pgm(5)
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- AUTHOR
- Copyright (C) 1989 by Jef Poskanzer.
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- Page 1 (printed 10/19/91)
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