1<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"> 2<HTML><HEAD><TITLE>Manpage of THUMBNAIL</TITLE> 3</HEAD><BODY BGCOLOR=WHITE><FONT FACE="helvetica, sans, arial"> 4<H1>THUMBNAIL</H1> 5Section: User Commands (1)<BR>Updated: September 26, 1994<BR><A HREF="#index">Index</A> 6<BR><A HREF="index.html">Return to Main Contents</A> 7<HR> 8 9<A NAME="lbAB"> </A> 10<H2>NAME</H2> 11 12thumbnail - create a 13<FONT SIZE="-1">TIFF</FONT> 14file with thumbnail images 15<A NAME="lbAC"> </A> 16<H2>SYNOPSIS</H2> 17 18<B>thumbnail</B> 19 20[ 21<I>options</I> 22 23] 24<I>input.tif</I> 25 26<I>output.tif</I> 27 28<A NAME="lbAD"> </A> 29<H2>DESCRIPTION</H2> 30 31<I>thumbnail</I> 32 33is a program written to show how one might use the 34SubIFD tag (#330) to store thumbnail images. 35<I>thumbnail</I> 36 37copies a 38<FONT SIZE="-1">TIFF</FONT> 39Class F facsimile file to the output file 40and for each image an 8-bit greyscale 41<I>thumbnail sketch</I>. 42 43The output file contains the thumbnail image with the associated 44full-resolution page linked below with the SubIFD tag. 45<P> 46 47By default, thumbnail images are 216 pixels wide by 274 pixels high. 48Pixels are calculated by sampling and filtering the input image 49with each pixel value passed through a contrast curve. 50<A NAME="lbAE"> </A> 51<H2>OPTIONS</H2> 52 53<DL COMPACT> 54<DT><B>-w</B> 55 56<DD> 57Specify the width of thumbnail images in pixels. 58<DT><B>-h</B> 59 60<DD> 61Specify the height of thumbnail images in pixels. 62<DT><B>-c</B> 63 64<DD> 65Specify a contrast curve to apply in generating the thumbnail images. 66By default pixels values are passed through a linear contrast curve 67that simply maps the pixel value ranges. 68Alternative curves are: 69<B>exp50</B> 70 71for a 50% exponential curve, 72<B>exp60</B> 73 74for a 60% exponential curve, 75<B>exp70</B> 76 77for a 70% exponential curve, 78<B>exp80</B> 79 80for a 80% exponential curve, 81<B>exp90</B> 82 83for a 90% exponential curve, 84<B>exp</B> 85 86for a pure exponential curve, 87<B>linear</B> 88 89for a linear curve. 90</DL> 91<A NAME="lbAF"> </A> 92<H2>BUGS</H2> 93 94There are no options to control the format of the saved thumbnail images. 95<A NAME="lbAG"> </A> 96<H2>SEE ALSO</H2> 97 98<I><A HREF="tiffdump+1.html">tiffdump</A></I>(1), 99 100<I><A HREF="tiffgt+1.html">tiffgt</A></I>(1), 101 102<I><A HREF="tiffinfo+1.html">tiffinfo</A></I>(1), 103 104<I><A HREF="libtiff+3">libtiff</A></I>(3) 105 106 107<HR> 108<A NAME="index"> </A><H2>Index</H2> 109<DL> 110<DT><A HREF="#lbAB">NAME</A><DD> 111<DT><A HREF="#lbAC">SYNOPSIS</A><DD> 112<DT><A HREF="#lbAD">DESCRIPTION</A><DD> 113<DT><A HREF="#lbAE">OPTIONS</A><DD> 114<DT><A HREF="#lbAF">BUGS</A><DD> 115<DT><A HREF="#lbAG">SEE ALSO</A><DD> 116</DL> 117<HR> 118This document was created by 119<A HREF="index.html">man2html</A>, 120using the manual pages.<BR> 121Time: 01:31:47 GMT, November 23, 1999 122</BODY> 123</HTML> 124