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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.3//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 > /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 <whatever> | 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="options">OPTIONS</h2>
<p>There are no command line options defined specifically
for <b>fstopgm</b>, but it recognizes the options common to all
programs based on libnetpbm (See <a href="index.html#commonoptions">
Common Options</a>.)
<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="#options">OPTIONS</a>
<li><a href="#seealso">SEE ALSO</a>
<li><a href="#author">AUTHOR</a>
</ul>
</body>
</html>
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