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<refentry id="tiff2bw-1">

<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>SUNWTiff</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>

<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>