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<refentry id="thumbnail-1">

<refmeta><refentrytitle>thumbnail</refentrytitle><manvolnum>1</manvolnum>

<refmiscinfo class="date">26 Mar 2004</refmiscinfo>

<refmiscinfo class="sectdesc">&man1;</refmiscinfo>

<refmiscinfo class="software">&release;</refmiscinfo>

<refmiscinfo class="arch">generic</refmiscinfo>

<refmiscinfo class="copyright">&suncopy;</refmiscinfo>

</refmeta>

<indexterm><primary>thumbnail</primary></indexterm><indexterm><primary>create

a TIFF file with thumbnail images</primary></indexterm>

<refnamediv id="thumbnail-1-name"><refname>thumbnail</refname><refpurpose>

create a TIFF file with thumbnail images</refpurpose></refnamediv>

<refsynopsisdiv id="thumbnail-1-synp"><title>&synp-tt;</title>

<cmdsynopsis><command>&cmd;</command><arg choice="opt"><option role="nodash"><replaceable>

options</replaceable></option></arg><arg choice="plain"><option role="nodash"><replaceable>

input.tif</replaceable></option></arg><arg choice="plain"><option role="nodash"><replaceable>

output.tif</replaceable></option></arg>

</cmdsynopsis></refsynopsisdiv>

<refsect1 id="thumbnail-1-desc"><title>&desc-tt;</title>

<para>The <command>&cmd;</command> command shows how to use the SubIFD tag

(#330) to store thumbnail images. <command>&cmd;</command> copies a TIFF Class

F facsimile file to the output file and, for each image, an 8-bit grayscale

thumbnail sketch. The output file contains the thumbnail image with the associated

full-resolution page linked below with the SubIFD tag.</para>

<para>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.</para>

</refsect1>

<refsect1 id="thumbnail-1-opts"><title>&opts-tt;</title>

<para>The following options are supported:</para>

<variablelist termlength="narrow">

<varlistentry><term><option>c</option></term><listitem><para>Specify a contrast

curve to apply when generating the thumbnail images. By default, pixel values

are passed through a linear contrast curve that simply maps the pixel value

ranges. Alternative curves are as follows:</para>

<variablelist>

<varlistentry><term>exp50</term><listitem><para>50% exponential curve</para>

</listitem></varlistentry>

<varlistentry><term>exp60</term><listitem><para>60% exponential curve</para>

</listitem></varlistentry>

<varlistentry><term>exp70</term><listitem><para>70% exponential curve</para>

</listitem></varlistentry>

<varlistentry><term>exp80</term><listitem><para>80% exponential curve</para>

</listitem></varlistentry>

<varlistentry><term>exp90</term><listitem><para>90% exponential curve</para>

</listitem></varlistentry>

<varlistentry><term>exp</term><listitem><para>pure exponential curve</para>

</listitem></varlistentry>

<varlistentry><term>linear</term><listitem><para>linear curve</para>

</listitem></varlistentry>

</variablelist></listitem></varlistentry>

<varlistentry><term><option>h</option></term><listitem><para>Specify the height

of thumbnail images in pixels.</para>

</listitem></varlistentry>

<varlistentry><term><option>w</option></term><listitem><para>Specify the width

of thumbnail images in pixels.</para>

</listitem></varlistentry>

</variablelist></refsect1>

<refsect1 id="thumbnail-1-oper"><title>&oper-tt;</title>

<para>The following operands are supported:</para>

<variablelist termlength="narrow">

<varlistentry><term><option role="nodash"><replaceable>input.tif</replaceable></option></term>

<listitem><para>The name of the input TIFF file.</para>

</listitem></varlistentry>

<varlistentry><term><option role="nodash"><replaceable>output.tif</replaceable></option></term>

<listitem><para>The name of the output file.</para>

</listitem></varlistentry>

</variablelist></refsect1>

<refsect1 id="thumbnail-1-attr"><title>&attr-tt;</title>

<para>See <olink targetdocent="REFMAN5" localinfo="attributes-5"><citerefentry>

<refentrytitle>attributes</refentrytitle><manvolnum>5</manvolnum></citerefentry></olink>

for descriptions of the following attributes:</para>

<informaltable frame="all">

<tgroup cols="2" colsep="1" rowsep="1"><colspec colname="COLSPEC0" colwidth="1*">

<colspec colname="COLSPEC1" colwidth="1*">

<thead>

<row><entry align="center" valign="middle">ATTRIBUTE TYPE</entry><entry align="center"

valign="middle">ATTRIBUTE VALUE</entry></row>

</thead>

<tbody>

<row><entry><para>Availability</para></entry><entry><para>image/library/libtiff</para></entry>

</row>

<row><entry colname="COLSPEC0"><para>Interface stability</para></entry><entry

colname="COLSPEC1"><para>Uncommitted</para></entry></row>

</tbody>

</tgroup>

</informaltable>

</refsect1>

<refsect1 id="thumbnail-1-also"><title>&also-tt;</title>

<para><citerefentry><refentrytitle>tiffdump</refentrytitle><manvolnum>1</manvolnum>

</citerefentry>, <citerefentry><refentrytitle>tiffgt</refentrytitle><manvolnum>

1</manvolnum></citerefentry>, <citerefentry><refentrytitle>tiffinfo</refentrytitle>

<manvolnum>1</manvolnum></citerefentry>, <citerefentry><refentrytitle>libtiff

</refentrytitle><manvolnum>3</manvolnum></citerefentry></para>

</refsect1>

<refsect1 id="thumbnail-1-note"><title>&note-tt;</title>

<para>There are no options to control the format of the saved thumbnail

images.</para>

<para>Updated by Breda McColgan, Sun Microsystems Inc., 2004.</para>

</refsect1>

</refentry>