RedHat 9 (Linux i386) - man page for fstopgm (redhat section 1)

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fstopgm(1)									       fstopgm(1)

NAME
       fstopgm - convert a Usenix FaceSaver(tm) file into a portable graymap

SYNOPSIS
       fstopgm [fsfile]

DESCRIPTION
       Reads a Usenix FaceSaver(tm) file as input.  Produces a portable graymap as output.

       FaceSaver(tm)  files sometimes have rectangular pixels.	While fstopgm won't re-scale them
       into square pixels for you, it will give you the precise pnmscale command that will do the
       job.  Because of this, reading a FaceSaver(tm) image is a two-step process.  First you do:
	 fstopgm > /dev/null
       This  will tell you whether you need to use pnmscale.  Then use one of the following pipe-
       lines:
	 fstopgm | pgmnorm
	 fstopgm | pnmscale -whatever | pgmnorm
       To go to PBM, you want something more like one of these:
	 fstopgm | pnmenlarge 3 | pgmnorm | pgmtopbm
	 fstopgm | pnmenlarge 3 | pnmscale <whatever> | pgmnorm | pgmtopbm
       You want to enlarge when going to a bitmap because otherwise  you  lose	information;  but
       enlarging by more than 3 does not look good.

       FaceSaver is a registered trademark of Metron Computerware Ltd. of Oakland, CA.

SEE ALSO
       pgmtofs(1), pgm(5), pgmnorm(1), pnmenlarge(1), pnmscale(1), pgmtopbm(1)

AUTHOR
       Copyright (C) 1989 by Jef Poskanzer.

					   06 April 89				       fstopgm(1)
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