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+<!-- Creator : groff version 1.18.1 -->
+<!-- CreationDate: Fri Jul 13 17:43:20 2007 -->
+<html>
+<head>
+<meta name="generator" content="groff -Thtml, see www.gnu.org">
+<meta name="Content-Style" content="text/css">
+<title>TIFFMEDIAN</title>
+</head>
+<body>
+
+<h1 align=center>TIFFMEDIAN</h1>
+<a href="#NAME">NAME</a><br>
+<a href="#SYNOPSIS">SYNOPSIS</a><br>
+<a href="#DESCRIPTION">DESCRIPTION</a><br>
+<a href="#OPTIONS">OPTIONS</a><br>
+<a href="#NOTES">NOTES</a><br>
+<a href="#SEE ALSO">SEE ALSO</a><br>
+
+<hr>
+<a name="NAME"></a>
+<h2>NAME</h2>
+<!-- INDENTATION -->
+<table width="100%" border=0 rules="none" frame="void"
+ cols="2" cellspacing="0" cellpadding="0">
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="91%">
+<p>tiffmedian &minus; apply the median cut algorithm to data
+in a <small>TIFF</small> file</p>
+</td>
+</table>
+<a name="SYNOPSIS"></a>
+<h2>SYNOPSIS</h2>
+<!-- INDENTATION -->
+<table width="100%" border=0 rules="none" frame="void"
+ cols="2" cellspacing="0" cellpadding="0">
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="91%">
+<p><b>tiffmedian</b> [ <i>options</i> ] <i>input.tif
+output.tif</i></p>
+</td>
+</table>
+<a name="DESCRIPTION"></a>
+<h2>DESCRIPTION</h2>
+<!-- INDENTATION -->
+<table width="100%" border=0 rules="none" frame="void"
+ cols="2" cellspacing="0" cellpadding="0">
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="91%">
+<p><i>tiffmedian</i> applies the median cut algorithm to an
+<small>RGB</small> image in <i>input.tif</i> to generate a
+palette image that is written to <i>output.tif</i>. The
+generated colormap has, by default, 256 entries. The image
+data is quantized by mapping each pixel to the closest color
+values in the colormap.</p>
+</td>
+</table>
+<a name="OPTIONS"></a>
+<h2>OPTIONS</h2>
+<!-- TABS -->
+<table width="100%" border=0 rules="none" frame="void"
+ cols="5" cellspacing="0" cellpadding="0">
+<tr valign="top" align="left">
+<td width="11%"></td>
+<td width="2%">
+
+<p><b>&minus;c</b></p>
+</td>
+<td width="5%"></td>
+<td width="80%">
+
+<p>Specify the compression to use for data written to the
+output file: <b>none</b> for no compression, <b>packbits</b>
+for PackBits compression, <b>lzw</b> for Lempel-Ziv &amp;
+Welch compression, and <b>zip</b> for Deflate compression.
+By default <i>tiffmedian</i> will compress data according to
+the value of the <i>Compression</i> tag found in the source
+file.</p>
+</td>
+<td width="0%">
+</td>
+</table>
+<!-- INDENTATION -->
+<table width="100%" border=0 rules="none" frame="void"
+ cols="2" cellspacing="0" cellpadding="0">
+<tr valign="top" align="left">
+<td width="17%"></td>
+<td width="82%">
+<p><small>LZW</small> compression can be specified together
+with a <i>predictor</i> value. A predictor value of 2 causes
+each scanline of the output image to undergo horizontal
+differencing before it is encoded; a value of 1 forces each
+scanline to be encoded without differencing. LZW-specific
+options are specified by appending a
+&lsquo;&lsquo;:&rsquo;&rsquo;-separated list to the
+&lsquo;&lsquo;lzw&rsquo;&rsquo; option; e.g. <b>&minus;c
+lzw:2</b> for <small>LZW</small> compression with horizontal
+differencing.</p>
+</td>
+</table>
+<!-- TABS -->
+<table width="100%" border=0 rules="none" frame="void"
+ cols="5" cellspacing="0" cellpadding="0">
+<tr valign="top" align="left">
+<td width="10%"></td>
+<td width="2%">
+
+<p><b>&minus;C</b></p>
+</td>
+<td width="6%"></td>
+<td width="80%">
+
+<p>Specify the number of entries to use in the generated
+colormap. By default all 256 entries/colors are used.</p>
+</td>
+<td width="0%">
+</td>
+<tr valign="top" align="left">
+<td width="10%"></td>
+<td width="2%">
+
+<p><b>&minus;f</b></p>
+</td>
+<td width="6%"></td>
+<td width="80%">
+
+<p>Apply Floyd-Steinberg dithering before selecting a
+colormap entry.</p>
+</td>
+<td width="0%">
+</td>
+<tr valign="top" align="left">
+<td width="10%"></td>
+<td width="2%">
+
+<p><b>&minus;r</b></p>
+</td>
+<td width="6%"></td>
+<td width="80%">
+
+<p>Specify the number of rows (scanlines) in each strip of
+data written to the output file. By default,
+<i>tiffmedian</i> attempts to set the rows/strip that no
+more than 8 kilobytes of data appear in a strip.</p>
+</td>
+<td width="0%">
+</td>
+</table>
+<a name="NOTES"></a>
+<h2>NOTES</h2>
+<!-- INDENTATION -->
+<table width="100%" border=0 rules="none" frame="void"
+ cols="2" cellspacing="0" cellpadding="0">
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="91%">
+<p>This program is derived from Paul Heckbert&rsquo;s
+<i>median</i> program.</p>
+</td>
+</table>
+<a name="SEE ALSO"></a>
+<h2>SEE ALSO</h2>
+<!-- INDENTATION -->
+<table width="100%" border=0 rules="none" frame="void"
+ cols="2" cellspacing="0" cellpadding="0">
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="91%">
+<p><b>pal2rgb</b>(1), <b>tiffinfo</b>(1), <b>tiffcp</b>(1),
+<b>tiffcmp</b>(1), <b>libtiff</b>(3TIFF)</p>
+<!-- INDENTATION -->
+<p><b>Color Image Quantization for Frame Buffer Display</b>,
+Paul Heckbert, SIGGRAPH proceedings, 1982, pp. 297-307.</p>
+<!-- INDENTATION -->
+<p>Libtiff library home page:
+<b>http://www.remotesensing.org/libtiff/</b></p>
+</td>
+</table>
+<hr>
+</body>
+</html>