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Fstopgm User Manual(0)                                  Fstopgm User Manual(0)



NAME
       fstopgm - convert a Usenix FaceSaver(tm) file into a PGM image



SYNOPSIS
       fstopgm [fsfile]


DESCRIPTION
       This program is part of Netpbm(1).

       fstopgm reads a Usenix FaceSaver(tm) file as input and produces a PGM image 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 pamscale command that will do the job.  Because of this, reading a  Face-
       Saver(tm) image is a two-step process.  First you do:

         fstopgm > /dev/null

       This will tell you whether you need to use pamscale.

       Then use one of the following pipelines:
         fstopgm | pgmnorm
         fstopgm | pamscale -whatever | pgmnorm

       To go to PBM, you want something more like one of these:
         fstopgm | pamenlarge 3 | pgmnorm | pamditherbw
         fstopgm | pamenlarge 3 | pamscale <whatever> | pgmnorm | pamditherbw

       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(1), pgmnorm(1), pamenlarge(1), pamscale(1), pamditherbw(1)



AUTHOR
       Copyright (C) 1989 by Jef Poskanzer.



netpbm documentation              06 April 89           Fstopgm User Manual(0)