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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.2//EN">
<HTML><HEAD><TITLE>Fstopgm User Manual</TITLE></HEAD>
<BODY>
<H1>fstopgm</H1>
Updated: 06 April 89
<BR>
<A HREF="#index">Table Of Contents</A>

<H2>NAME</H2>
fstopgm - convert a Usenix FaceSaver(tm) file into a PGM image


<H2 id="synopsis">SYNOPSIS</H2>

<B>fstopgm</B>
[<I>fsfile</I>]

<H2 id="description">DESCRIPTION</H2>

<p>This program is part of <a href="index.html">Netpbm</a>.

<p><b>fstopgm</b> reads a Usenix FaceSaver(tm) file as input and
produces a PGM image as output.

<P>FaceSaver(tm) files sometimes have rectangular pixels.  While
<B>fstopgm</B> won't re-scale them into square pixels for you, it will
give you the precise <B>pamscale</B> command that will do the job.
Because of this, reading a FaceSaver(tm) image is a two-step process.
First you do:

<PRE>
  fstopgm &gt; /dev/null
</PRE>

This will tell you whether you need to use <B>pamscale.</B>

Then use one of the following pipelines:
<PRE>
  fstopgm | pnmnorm
  fstopgm | pamscale -whatever | pnmnorm
</PRE>

To go to PBM, you want something more like one of these:
<PRE>
  fstopgm | pamenlarge 3 | pnmnorm | pamditherbw
  fstopgm | pamenlarge 3 | pamscale &lt;whatever&gt; | pnmnorm | pamditherbw
</PRE>

You want to enlarge when going to a bitmap because otherwise you lose
information; but enlarging by more than 3 does not look good.

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


<H2 id="seealso">SEE ALSO</H2>

<A HREF="pgmtofs.html">pgmtofs</A>,
<A HREF="pgm.html">pgm</A>,
<A HREF="pnmnorm.html">pnmnorm</A>,
<A HREF="pamenlarge.html">pamenlarge</A>,
<A HREF="pamscale.html">pamscale</A>,
<A HREF="pamditherbw.html">pamditherbw</A>


<H2 id="author">AUTHOR</H2>

Copyright (C) 1989 by Jef Poskanzer.

<HR>
<H2 id="index">Table Of Contents</H2>
<UL>
<LI><A HREF="#synopsis">SYNOPSIS</A>
<LI><A HREF="#description">DESCRIPTION</A>
<LI><A HREF="#seealso">SEE ALSO</A>
<LI><A HREF="#author">AUTHOR</A>
</UL>
</BODY>
</HTML>