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<title>TIFF2BW</title>
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<h1 align="center">TIFF2BW</h1>
<a href="#NAME">NAME</a><br>
<a href="#SYNOPSIS">SYNOPSIS</a><br>
<a href="#DESCRIPTION">DESCRIPTION</a><br>
<a href="#OPTIONS">OPTIONS</a><br>
<a href="#SEE ALSO">SEE ALSO</a><br>
<hr>
<h2>NAME
<a name="NAME"></a>
</h2>
<p style="margin-left:11%; margin-top: 1em">tiff2bw −
convert a color <small>TIFF</small> image to greyscale</p>
<h2>SYNOPSIS
<a name="SYNOPSIS"></a>
</h2>
<p style="margin-left:11%; margin-top: 1em"><b>tiff2bw</b>
[ <i>options</i> ] <i>input.tif output.tif</i></p>
<h2>DESCRIPTION
<a name="DESCRIPTION"></a>
</h2>
<p style="margin-left:11%; margin-top: 1em"><i>Tiff2bw</i>
converts an <small>RGB</small> or Palette color
<small>TIFF</small> image to a greyscale 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, the <b>−R</b>,
<b>−G</b>, and <b>−B</b> options may be
used.</p>
<h2>OPTIONS
<a name="OPTIONS"></a>
</h2>
<table width="100%" border="0" rules="none" frame="void"
cellspacing="0" cellpadding="0">
<tr valign="top" align="left">
<td width="11%"></td>
<td width="3%">
<p style="margin-top: 1em"><b>−c</b></p></td>
<td width="8%"></td>
<td width="78%">
<p style="margin-top: 1em">Specify a compression scheme to
use when writing image data: <b>−c none</b> for no
compression, <b>−c packbits</b> for the PackBits
compression algorithm, <b>−c zip</b> for the Deflate
compression algorithm, <b>−c g3</b> for the CCITT
Group 3 compression algorithm, <b>−c g4</b> for the
CCITT Group 4 compression algorithm, and <b>−c lzw</b>
for Lempel-Ziv & Welch (the default).</p></td></tr>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="3%">
<p><b>−r</b></p></td>
<td width="8%"></td>
<td width="78%">
<p>Write data with a specified number of rows per strip; by
default the number of rows/strip is selected so that each
strip is approximately 8 kilobytes.</p></td></tr>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="3%">
<p><b>−R</b></p></td>
<td width="8%"></td>
<td width="78%">
<p>Specify the percentage of the red channel to use
(default 28).</p></td></tr>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="3%">
<p><b>−G</b></p></td>
<td width="8%"></td>
<td width="78%">
<p>Specify the percentage of the green channel to use
(default 59).</p></td></tr>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="3%">
<p><b>−B</b></p></td>
<td width="8%"></td>
<td width="78%">
<p>Specify the percentage of the blue channel to use
(default 11).</p></td></tr>
</table>
<h2>SEE ALSO
<a name="SEE ALSO"></a>
</h2>
<p style="margin-left:11%; margin-top: 1em"><b>pal2rgb</b>(1),
<b>tiffinfo</b>(1), <b>tiffcp</b>(1), <b>tiffmedian</b>(1),
<b>libtiff</b>(3)</p>
<p style="margin-left:11%; margin-top: 1em">Libtiff library
home page: <b>http://www.simplesystems.org/libtiff/</b></p>
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