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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 − 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>−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>−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>−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>
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