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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.2//EN">
<HTML><HEAD><TITLE>Pnmscale User Manual</TITLE></HEAD>
<BODY>
<H1>pnmscale</H1>
Updated: 25 January 2004
<BR>
<A HREF="#index">Table Of Contents</A>
<A NAME="lbAB"> </A>
<H2>NAME</H2>
pnmscale - scale a PNM image
<A NAME="lbAC"> </A>
<H2>SYNOPSIS</H2>
<pre>
<B>pnmscale</B>
[
<I>scale_factor</I>
|
<b>-xysize</b> <I>cols</i> <i>rows</I>
|
<B>-reduce</B> <I>reduction_factor</I>
|
[<B>-xsize=</B><I>cols</I> | <B>-width=</B><I>cols</I> | <B>-xscale=</B><I>factor</I>]
[<B>-ysize=</B><I>rows</I> | <B>-height=</B><I>rows</I> | <B>-yscale=</B><I>factor</I>]
|
<b>-pixels</B> <I>n</I>
]
[<B>-verbose</b>]
[<b>-nomix</B>]
[<I>pnmfile</I>]
</pre>
<A NAME="lbAD"> </A>
<H2>DESCRIPTION</H2>
<p>This program is part of <a href="index.html">Netpbm</a>.
<p><b>pnmscale</b> was obsoleted by <a
href="pamscale.html"><b>pamscale</b></a>, introduced with Netpbm 10.20
(January 2004). <b>pamscale</b> is backward compatible with
<b>pnmscale</b>, plus adds many additional functions, including the
ability to process PAM images, and tends to produce better results.
<p><b>pnmscale</b> remains in the current Netpbm package because it
probably has fewer bugs for now than <b>pamscale</b>, and may have
superior performance characteristics in some cases. Some day,
<b>pnmscale</b> will probably become an alias for <b>pamscale</b>.
<p>You can use the <b>pamscale</b> documentation for <b>pnmscale</b>,
considering the following differences:
<ul>
<li><b>pnmscale</b> options are a subset of <b>pamscale</b>'s, as
documented above.
<li><b>pnmscale</b> always assumes the input is linear, as <b>pamscale</b>
does when you specify its <b>-linear</b> option.
<li><b>pnmscale</b> cannot process PAM images.
</ul>
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