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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.3//EN">
<html><head><title>Ppmbrighten User Manual</title></head>
<body>
<h1>ppmbrighten</h1>
Updated: 09 August 2020
<h2>NAME</h2>
ppmbrighten - replaced by pambrighten
<h2>DESCRIPTION</h2>
<p>This program is part of <a href="index.html">Netpbm</a>.
<p>Starting with Netpbm 10.86 (March 2019), <b>ppmbrighten</b> is
obsolete. Use <a href="pambrighten.html"><b>pambrighten</b></a> instead.
<b>pambrighten</b> is mostly backward compatible with <b>ppmbrighten</b>. You
can use the <b>pambrighten</b> manual for <b>ppmbrighten</b> as long as you
ignore features that were added after Netpbm 10.86.
<p>One way in which <b>pambrighten</b> is not backward compatible is that
<b>pambrighten</b> does not have a <b>-normalize</b> option. If you want
that function, use <b>pnmnorm</b> on the image before passing it to
<b>pambrighten</b>.
<p>Another backward incompatibility is that <b>pambrighten</b> produces the
same kind of output as the input, whereas <b>ppmbrighten</b> always
produces PPM. If you need PPM output, pass the results through
<b>ppmtoppm</b>.
<p><b>ppmbrighten</b> is currently implemented as a triviel program that
invokes <b>pambrighten</b>, <b>pnmnorm</b>, and <b>ppmtoppm</b>.
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