1<html> 2<head> 3<meta name="generator" content="groff -Thtml, see www.gnu.org"> 4<meta name="Content-Style" content="text/css"> 5<title>THUMBNAIL</title> 6</head> 7<body> 8 9<h1 align=center>THUMBNAIL</h1> 10<a href="#NAME">NAME</a><br> 11<a href="#SYNOPSIS">SYNOPSIS</a><br> 12<a href="#DESCRIPTION">DESCRIPTION</a><br> 13<a href="#OPTIONS">OPTIONS</a><br> 14<a href="#BUGS">BUGS</a><br> 15<a href="#SEE ALSO">SEE ALSO</a><br> 16 17<hr> 18<!-- Creator : groff version 1.17.2 --> 19<!-- CreationDate: Mon Dec 22 00:39:32 2003 --> 20<a name="NAME"></a> 21<h2>NAME</h2> 22<table width="100%" border=0 rules="none" frame="void" 23 cols="2" cellspacing="0" cellpadding="0"> 24<tr valign="top" align="left"> 25<td width="10%"></td><td width="90%"> 26thumbnail - create a <small>TIFF</small> file with thumbnail images</td></table> 27<a name="SYNOPSIS"></a> 28<h2>SYNOPSIS</h2> 29 30<table width="100%" border=0 rules="none" frame="void" 31 cols="2" cellspacing="0" cellpadding="0"> 32<tr valign="top" align="left"> 33<td width="10%"></td><td width="90%"> 34<b>thumbnail</b> [ <i>options</i> ] <i>input.tif 35output.tif</i></td></table> 36<a name="DESCRIPTION"></a> 37<h2>DESCRIPTION</h2> 38 39<table width="100%" border=0 rules="none" frame="void" 40 cols="2" cellspacing="0" cellpadding="0"> 41<tr valign="top" align="left"> 42<td width="10%"></td><td width="90%"> 43<i>thumbnail</i> is a program written to show how one might 44use the SubIFD tag (#330) to store thumbnail images. 45<i>thumbnail</i> copies a <small>TIFF</small> Class F 46facsimile file to the output file and for each image an 478-bit greyscale <i>thumbnail sketch</i>. The output file 48contains the thumbnail image with the associated 49full-resolution page linked below with the SubIFD 50tag.</td></table> 51 52<table width="100%" border=0 rules="none" frame="void" 53 cols="2" cellspacing="0" cellpadding="0"> 54<tr valign="top" align="left"> 55<td width="10%"></td><td width="90%"> 56By default, thumbnail images are 216 pixels wide by 274 57pixels high. Pixels are calculated by sampling and filtering 58the input image with each pixel value passed through a 59contrast curve.</td></table> 60<a name="OPTIONS"></a> 61<h2>OPTIONS</h2> 62 63<table width="100%" border=0 rules="none" frame="void" 64 cols="2" cellspacing="0" cellpadding="0"> 65<tr valign="top" align="left"> 66<td width="10%"></td><td width="90%"> 67<b>-w</b></td></table> 68 69<table width="100%" border=0 rules="none" frame="void" 70 cols="2" cellspacing="0" cellpadding="0"> 71<tr valign="top" align="left"> 72<td width="21%"></td><td width="79%"> 73Specify the width of thumbnail images in 74pixels.</td></table> 75 76<table width="100%" border=0 rules="none" frame="void" 77 cols="2" cellspacing="0" cellpadding="0"> 78<tr valign="top" align="left"> 79<td width="10%"></td><td width="90%"> 80<b>-h</b></td></table> 81 82<table width="100%" border=0 rules="none" frame="void" 83 cols="2" cellspacing="0" cellpadding="0"> 84<tr valign="top" align="left"> 85<td width="21%"></td><td width="79%"> 86Specify the height of thumbnail images in 87pixels.</td></table> 88 89<table width="100%" border=0 rules="none" frame="void" 90 cols="2" cellspacing="0" cellpadding="0"> 91<tr valign="top" align="left"> 92<td width="10%"></td><td width="90%"> 93<b>-c</b></td></table> 94 95<table width="100%" border=0 rules="none" frame="void" 96 cols="2" cellspacing="0" cellpadding="0"> 97<tr valign="top" align="left"> 98<td width="21%"></td><td width="79%"> 99Specify a contrast curve to apply in generating the 100thumbnail images. By default pixels values are passed 101through a linear contrast curve that simply maps the pixel 102value ranges. Alternative curves are: <b>exp50</b> for a 50% 103exponential curve, <b>exp60</b> for a 60% exponential curve, 104<b>exp70</b> for a 70% exponential curve, <b>exp80</b> for a 10580% exponential curve, <b>exp90</b> for a 90% exponential 106curve, <b>exp</b> for a pure exponential curve, 107<b>linear</b> for a linear curve.</td></table> 108<a name="BUGS"></a> 109<h2>BUGS</h2> 110 111<table width="100%" border=0 rules="none" frame="void" 112 cols="2" cellspacing="0" cellpadding="0"> 113<tr valign="top" align="left"> 114<td width="10%"></td><td width="90%"> 115There are no options to control the format of the saved 116thumbnail images.</td></table> 117<a name="SEE ALSO"></a> 118<h2>SEE ALSO</h2> 119 120<table width="100%" border=0 rules="none" frame="void" 121 cols="2" cellspacing="0" cellpadding="0"> 122<tr valign="top" align="left"> 123<td width="10%"></td><td width="90%"> 124<i>tiffdump</i>(1), <i>tiffgt</i>(1), <i>tiffinfo</i>(1), 125<i>libtiff</i>(3)</td></table> 126<hr> 127</body> 128</html> 129