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+<!-- Creator : groff version 1.18.1 -->
+<!-- CreationDate: Sat Feb 24 18:37:19 2007 -->
+<html>
+<head>
+<meta name="generator" content="groff -Thtml, see www.gnu.org">
+<meta name="Content-Style" content="text/css">
+<title>THUMBNAIL</title>
+</head>
+<body>
+
+<h1 align=center>THUMBNAIL</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="#BUGS">BUGS</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>thumbnail &minus; create a <small>TIFF</small> file with
+thumbnail images</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>thumbnail</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>thumbnail</i> is a program written to show how one
+might use the SubIFD tag (#330) to store thumbnail images.
+<i>thumbnail</i> copies a <small>TIFF</small> Class F
+facsimile file to the output file and for each image an
+8-bit greyscale <i>thumbnail sketch</i>. The output file
+contains the thumbnail image with the associated
+full-resolution page linked below with the SubIFD tag.</p>
+<!-- INDENTATION -->
+<p>By default, thumbnail images are 216 pixels wide by 274
+pixels high. Pixels are calculated by sampling and filtering
+the input image with each pixel value passed through a
+contrast curve.</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="10%"></td>
+<td width="3%">
+
+<p><b>&minus;w</b></p>
+</td>
+<td width="5%"></td>
+<td width="80%">
+
+<p>Specify the width of thumbnail images in pixels.</p>
+</td>
+<td width="0%">
+</td>
+<tr valign="top" align="left">
+<td width="10%"></td>
+<td width="3%">
+
+<p><b>&minus;h</b></p>
+</td>
+<td width="5%"></td>
+<td width="80%">
+
+<p>Specify the height of thumbnail images in pixels.</p>
+</td>
+<td width="0%">
+</td>
+<tr valign="top" align="left">
+<td width="10%"></td>
+<td width="3%">
+
+<p><b>&minus;c</b></p>
+</td>
+<td width="5%"></td>
+<td width="80%">
+
+<p>Specify a contrast curve to apply in generating the
+thumbnail images. By default pixels values are passed
+through a linear contrast curve that simply maps the pixel
+value ranges. Alternative curves are: <b>exp50</b> for a 50%
+exponential curve, <b>exp60</b> for a 60% exponential curve,
+<b>exp70</b> for a 70% exponential curve, <b>exp80</b> for a
+80% exponential curve, <b>exp90</b> for a 90% exponential
+curve, <b>exp</b> for a pure exponential curve,
+<b>linear</b> for a linear curve.</p>
+</td>
+<td width="0%">
+</td>
+</table>
+<a name="BUGS"></a>
+<h2>BUGS</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>There are no options to control the format of the saved
+thumbnail images.</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>tiffdump</b>(1), <b>tiffgt</b>(1), <b>tiffinfo</b>(1),
+<b>libtiff</b>(3)</p>
+<!-- INDENTATION -->
+<p>Libtiff library home page:
+<b>http://www.remotesensing.org/libtiff/</b></p>
+</td>
+</table>
+<hr>
+</body>
+</html>