124 lines
2.6 KiB
HTML
124 lines
2.6 KiB
HTML
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
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<HTML><HEAD><TITLE>Manpage of THUMBNAIL</TITLE>
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</HEAD><BODY BGCOLOR=WHITE><FONT FACE="helvetica, sans, arial">
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<H1>THUMBNAIL</H1>
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Section: User Commands (1)<BR>Updated: September 26, 1994<BR><A HREF="#index">Index</A>
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<BR><A HREF="index.html">Return to Main Contents</A>
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<HR>
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<A NAME="lbAB"> </A>
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<H2>NAME</H2>
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thumbnail - create a
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<FONT SIZE="-1">TIFF</FONT>
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file with thumbnail images
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<A NAME="lbAC"> </A>
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<H2>SYNOPSIS</H2>
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<B>thumbnail</B>
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[
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<I>options</I>
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]
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<I>input.tif</I>
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<I>output.tif</I>
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<A NAME="lbAD"> </A>
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<H2>DESCRIPTION</H2>
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<I>thumbnail</I>
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is a program written to show how one might use the
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SubIFD tag (#330) to store thumbnail images.
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<I>thumbnail</I>
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copies a
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<FONT SIZE="-1">TIFF</FONT>
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Class F facsimile file to the output file
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and for each image an 8-bit greyscale
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<I>thumbnail sketch</I>.
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The output file contains the thumbnail image with the associated
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full-resolution page linked below with the SubIFD tag.
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<P>
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By default, thumbnail images are 216 pixels wide by 274 pixels high.
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Pixels are calculated by sampling and filtering the input image
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with each pixel value passed through a contrast curve.
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<A NAME="lbAE"> </A>
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<H2>OPTIONS</H2>
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<DL COMPACT>
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<DT><B>-w</B>
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<DD>
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Specify the width of thumbnail images in pixels.
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<DT><B>-h</B>
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<DD>
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Specify the height of thumbnail images in pixels.
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<DT><B>-c</B>
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<DD>
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Specify a contrast curve to apply in generating the thumbnail images.
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By default pixels values are passed through a linear contrast curve
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that simply maps the pixel value ranges.
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Alternative curves are:
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<B>exp50</B>
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for a 50% exponential curve,
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<B>exp60</B>
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for a 60% exponential curve,
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<B>exp70</B>
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for a 70% exponential curve,
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<B>exp80</B>
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for a 80% exponential curve,
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<B>exp90</B>
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for a 90% exponential curve,
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<B>exp</B>
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for a pure exponential curve,
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<B>linear</B>
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for a linear curve.
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</DL>
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<A NAME="lbAF"> </A>
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<H2>BUGS</H2>
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There are no options to control the format of the saved thumbnail images.
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<A NAME="lbAG"> </A>
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<H2>SEE ALSO</H2>
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<I><A HREF="tiffdump+1.html">tiffdump</A></I>(1),
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<I><A HREF="tiffgt+1.html">tiffgt</A></I>(1),
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<I><A HREF="tiffinfo+1.html">tiffinfo</A></I>(1),
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<I><A HREF="libtiff+3">libtiff</A></I>(3)
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<HR>
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<A NAME="index"> </A><H2>Index</H2>
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<DL>
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<DT><A HREF="#lbAB">NAME</A><DD>
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<DT><A HREF="#lbAC">SYNOPSIS</A><DD>
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<DT><A HREF="#lbAD">DESCRIPTION</A><DD>
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<DT><A HREF="#lbAE">OPTIONS</A><DD>
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<DT><A HREF="#lbAF">BUGS</A><DD>
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<DT><A HREF="#lbAG">SEE ALSO</A><DD>
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</DL>
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<HR>
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This document was created by
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<A HREF="index.html">man2html</A>,
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using the manual pages.<BR>
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Time: 01:31:47 GMT, November 23, 1999
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</BODY>
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</HTML>
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