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 FaceSaver(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 | pnmnorm
         fstopgm | pamscale -whatever | pnmnorm

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

OPTIONS

       There are no command line options defined specifically for fstopgm, but it recognizes  the
       options common to all programs based on libnetpbm (See
        Common Options ⟨index.html#commonoptions⟩ .)

SEE ALSO

       pgmtofs(1), pgm(1), pnmnorm(1), pamenlarge(1), pamscale(1), pamditherbw(1)

AUTHOR

       Copyright (C) 1989 by Jef Poskanzer.

DOCUMENT SOURCE

       This  manual page was generated by the Netpbm tool 'makeman' from HTML source.  The master
       documentation is at

              http://netpbm.sourceforge.net/doc/fstopgm.html