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1994-03-01
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pbmtopgm(12 Dec 1990) AMIGA pbmtopgm(12 Dec 1990)
NAME
pbmtopgm - convert portable bitmap to portable graymap by
averaging areas
SYNOPSIS
pbmtopgm <width> <height> [pbmfile]
DESCRIPTION
Reads a portable bitmap as input. Outputs a portable graymap
created by averaging the number of pixels within a sample
area of width by height around each point. Pbmtopgm is
similar to a special case of ppmconvol. A ppmsmooth step may
be needed after pbmtopgm.
Pbmtopgm has the effect of anti-aliasing bitmaps which
contain distinct line features.
SEE ALSO
pbm(5)
AUTHOR
Copyright (C) 1990 by Angus Duggan Copyright (C) 1989 by Jef
Poskanzer.
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
documentation. This software is provided "as is" without
express or implied warranty.
NOTES
Pbmtopgm works best with odd sample width and heights.
Page 1 (printed 3/1/94)