# fstopgm

Updated: 06 April 89
Table Of Contents

## NAME

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

## SYNOPSIS

fstopgm [fsfile]

## DESCRIPTION

This program is part of Netpbm.

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.

## SEE ALSO

pgmtofs, pgm, pnmnorm, pamenlarge, pamscale, pamditherbw

## AUTHOR

Copyright (C) 1989 by Jef Poskanzer.

## Table Of Contents

- SYNOPSIS
- DESCRIPTION
- SEE ALSO
- AUTHOR