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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.3//EN">
<html><head><title>Rletopnm User Manual</title></head>
<body>
<h1>rletopnm</h1>
Updated: 13 April 2000
<br>
<a href="#index">Table Of Contents</a>
<h2>NAME</h2>
rletopnm - convert a Utah Raster Tools RLE image file to a PNM image file.
<h2 id="synopsis">SYNOPSIS</h2>
<b>rletopnm</b>
[<b>--alphaout=</b>{<i>alpha-filename</i>,<b>-</b>}]
[<b>--headerdump</b>|<b>-h</b>]
[<b>--verbose</b>|<b>-v</b>]
[<i>rlefile</i>|<b>-</b>]
<p>All options may be abbreviated to their minimum unique abbreviation
and options and arguments may be in any order.
<h2 id="description">DESCRIPTION</h2>
<p>This program is part of <a href="index.html">Netpbm</a>.
<p><b>rletopnm</b> converts Utah Raster Toolkit RLE image files to PNM
image files. <b>rletopnm</b> handles four types of RLE files:
Grayscale (8 bit data, no color map), Pseudocolor (8 bit data with a
color map), Truecolor (24 bit data with color map), and Directcolor
(24 bit data, no color map). <b>rletopnm</b> generates a PPM file for
all these cases except for the Grayscale file, for which
<b>rletopnm</b> generates a PGM file.
<p><i>rlefile</i> is the RLE input file. If it is absent or <b>-</b>,
the input comes from Standard Input.
<h2 id="options">OPTIONS</h2>
<p>In addition to the options common to all programs based on libnetpbm
(most notably <b>-quiet</b>, see <a href="index.html#commonoptions">
Common Options</a>), <b>rletopnm</b> recognizes the following
command line options:
<dl compact>
<dt><b>--alphaout=</b><i>alpha-filename</i>
<dd>
<b>rletopnm </b> creates a PGM (portable graymap) file containing the
transparency channel values in the input image. If the input image doesn't
contain an transparency channel, the <i>alpha-filename</i> file contains all
zero (transparent) transparency values. If you don't specify
<b>--alphaout</b>, <b>rletopnm</b> does not generate a transparency file,
and if the input image has a transparency channel, <b>rletopnm</b> simply
discards it.
<p>If you specify <b>-</b> as the filename, <b>rletopnm</b> writes the
transparency output to Standard Output and discards the image.
<p>See <b><a href="pamcomp.html">pamcomp</a></b> for one way to use
the transparency output file.
<dt><b>--verbose</b>
<dd>This option causes <b>rletopnm </b> to operate in verbose mode.
It prints messages about what it's doing, including the contents of
the RLE image header, to Standard Error.
<dt><b>--headerdump</b>
<dd>This option causes <b>rletopnm</b> to operate in header dump mode.
It prints the contents of the RLE image header to Standard Error, but
does not produce any other output.
</dl>
<h2 id="examples">EXAMPLES</h2>
<ul>
<li>While running in verbose mode, convert lenna.rle to PPM format and
store the resulting image as lenna.ppm:
<pre>
<kbd>
rletopnm --verbose lenna.rle >lenna.ppm
</kbd>
</pre>
<li>Dump the header information of the RLE file called file.rle:
<pre>
<kbd>
rletopnm --headerdump file.rle
</kbd>
</pre>
<li>Convert RLE file dart.rle to PPM format as dart.ppm. Store the
transparency channel of dart.rle as dartalpha.pgm (if dart.rle doesn't have
a transparency channel, store a fully transparent transparency mask as
dartalpha.pgm):
<pre>
<kbd>
rletopnm --alphaout=dartalpha.pgm dart.rle >dart.ppm
</kbd>
</pre>
</ul>
<h2 id="seealso">SEE ALSO</h2>
<b><a href="pnmtorle.html">pnmtorle</a></b>,
<b><a href="pnmconvol.html">pnmconvol</a></b>,
<b><a href="pnm.html">pnm</a></b>,
<b><a href="ppm.html">ppm</a></b>,
<b><a href="pgm.html">pgm</a></b>,
<h2 id="author">AUTHOR</h2>
Wes Barris
<br>
Army High Performance Computing Research Center (AHPCRC)
<br>
Minnesota Supercomputer Center, Inc.
<p>Modifications by Eric Haines to produce raw and plain formats.
<p>Modifications by Bryan Henderson to create transparency files and use
mnemonic options.
<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="#examples">EXAMPLES</a>
<li><a href="#seealso">SEE ALSO</a>
<li><a href="#author">AUTHOR</a>
</ul>
</body>
</html>
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