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<refentry id="tiff2bw-1">
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<refmeta><refentrytitle>tiff2bw</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>tiff2bw</primary></indexterm><indexterm><primary>convert
a color TIFF image to grayscale</primary></indexterm>
<refnamediv id="tiff2bw-1-name"><refname>tiff2bw</refname><refpurpose>convert
a color TIFF image to grayscale</refpurpose></refnamediv>
<refsynopsisdiv id="tiff2bw-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="tiff2bw-1-desc"><title>&desc-tt;</title>
<para><command>&cmd;</command> converts an RGB or palette color TIFF image
to a grayscale image by combining percentages of the red, green, and blue
channels. By default, output samples are created by taking 28% of the red
channel, 59% of the green channel, and 11% of the blue channel. To alter these
percentages, use the <option>R</option>. <option>G</option>, and <option>
B</option> options.</para>
</refsect1>
<refsect1 id="tiff2bw-1-opts"><title>&opts-tt;</title>
<para>The following options are supported:</para>
<variablelist termlength="narrow">
<varlistentry><term><option>B</option></term><listitem><para>Specify the percentage
of the blue channel to use. The default value is 11.</para>
</listitem></varlistentry>
<varlistentry><term><option>c</option></term><listitem><para>Specify a compression
scheme to use when writing image data:</para>
<variablelist>
<varlistentry><term><option>c g3</option></term><listitem><para>CCITT Group
3 compression algorithm.</para>
</listitem></varlistentry>
<varlistentry><term><option>c g4</option></term><listitem><para>CCITT Group
4 compression algorithm.</para>
</listitem></varlistentry>
<varlistentry><term><option>c lzw</option></term><listitem><para>Lempel-Ziv
and Welch algorithm. This is the default algorithm.</para>
</listitem></varlistentry>
<varlistentry><term><option>c none</option></term><listitem><para>No compression.
</para>
</listitem></varlistentry>
<varlistentry><term><option>c packbits</option></term><listitem><para>PackBits
compression algorithm.</para>
</listitem></varlistentry>
<varlistentry><term><option>c zip</option></term><listitem><para>Deflate compression
algorithm.</para>
</listitem></varlistentry>
</variablelist></listitem></varlistentry>
<varlistentry><term><option>G</option></term><listitem><para>Specify the percentage
of the green channel to use. The default value is 59.</para>
</listitem></varlistentry>
<varlistentry><term><option>R</option></term><listitem><para>Specify the percentage
of the red channel to use. The default value is 28.</para>
</listitem></varlistentry>
<varlistentry><term><option>r</option></term><listitem><para>Write data with
a specified number of rows per strip. By default, the number of rows per strip
is selected so that each strip is approximately 8 kilobytes.</para>
</listitem></varlistentry>
</variablelist>
<variablelist termlength="narrow"></variablelist></refsect1>
<refsect1 id="tiff2bw-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="tiff2bw-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="tiff2bw-1-also"><title>&also-tt;</title>
<!--Reference to another man page-->
<!--Reference to a Help manual-->
<!--Reference to a book.-->
<para><citerefentry><refentrytitle>pal2rgb</refentrytitle><manvolnum>1</manvolnum>
</citerefentry>, <citerefentry><refentrytitle>tiffinfo</refentrytitle><manvolnum>
1</manvolnum></citerefentry>, <citerefentry><refentrytitle>tiffcp</refentrytitle>
<manvolnum>1</manvolnum></citerefentry>, <citerefentry><refentrytitle>tiffmedian
</refentrytitle><manvolnum>1</manvolnum></citerefentry>, <citerefentry><refentrytitle>
libtiff</refentrytitle><manvolnum>3</manvolnum></citerefentry></para>
</refsect1>
<refsect1 id="tiff2bw-1-note"><title>&note-tt;</title>
<para>Updated by Breda McColgan, Sun Microsystems Inc., 2004.</para>
</refsect1>
</refentry>
