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1<!-- Creator : groff version 1.18.1 -->
2<!-- CreationDate: Mon Mar 13 18:03:12 2006 -->
3<html>
4<head>
5<meta name="generator" content="groff -Thtml, see www.gnu.org">
6<meta name="Content-Style" content="text/css">
7<title>TIFF2BW</title>
8</head>
9<body>
10
11<h1 align=center>TIFF2BW</h1>
12<a href="#NAME">NAME</a><br>
13<a href="#SYNOPSIS">SYNOPSIS</a><br>
14<a href="#DESCRIPTION">DESCRIPTION</a><br>
15<a href="#OPTIONS">OPTIONS</a><br>
16<a href="#SEE ALSO">SEE ALSO</a><br>
17
18<hr>
19<a name="NAME"></a>
20<h2>NAME</h2>
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26<td width="91%">
27<p>tiff2bw &minus; convert a color <small>TIFF</small> image
28to greyscale</p>
29</td>
30</table>
31<a name="SYNOPSIS"></a>
32<h2>SYNOPSIS</h2>
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38<td width="91%">
39<p><b>tiff2bw</b> [ options ] <i>input.tif
40output.tif</i></p>
41</td>
42</table>
43<a name="DESCRIPTION"></a>
44<h2>DESCRIPTION</h2>
45<!-- INDENTATION -->
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51<p><i>Tiff2bw</i> converts an <small>RGB</small> or Palette
52color <small>TIFF</small> image to a greyscale image by
53combining percentages of the red, green, and blue channels.
54By default, output samples are created by taking 28% of the
55red channel, 59% of the green channel, and 11% of the blue
56channel. To alter these percentages, the <b>&minus;R</b>,
57<b>&minus;G</b>, and <b>&minus;B</b> options may be
58used.</p>
59</td>
60</table>
61<a name="OPTIONS"></a>
62<h2>OPTIONS</h2>
63<!-- TABS -->
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67<td width="10%"></td>
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69
70<p><b>&minus;c</b></p>
71</td>
72<td width="5%"></td>
73<td width="80%">
74
75<p>Specify a compression scheme to use when writing image
76data: <b>&minus;c none</b> for no compression, <b>-c
77packbits</b> for the PackBits compression algorithm, <b>-c
78zip</b> for the Deflate compression algorithm, <b>-c g3</b>
79for the CCITT Group 3 compression algorithm, <b>-c g4</b>
80for the CCITT Group 4 compression algorithm, and <b>&minus;c
81lzw</b> for Lempel-Ziv &amp; Welch (the default).</p>
82</td>
83<td width="0%">
84</td>
85<tr valign="top" align="left">
86<td width="10%"></td>
87<td width="3%">
88
89<p><b>&minus;r</b></p>
90</td>
91<td width="5%"></td>
92<td width="80%">
93
94<p>Write data with a specified number of rows per strip; by
95default the number of rows/strip is selected so that each
96strip is approximately 8 kilobytes.</p>
97</td>
98<td width="0%">
99</td>
100<tr valign="top" align="left">
101<td width="10%"></td>
102<td width="3%">
103
104<p><b>&minus;R</b></p>
105</td>
106<td width="5%"></td>
107<td width="80%">
108
109<p>Specify the percentage of the red channel to use
110(default 28).</p>
111</td>
112<td width="0%">
113</td>
114<tr valign="top" align="left">
115<td width="10%"></td>
116<td width="3%">
117
118<p><b>&minus;G</b></p>
119</td>
120<td width="5%"></td>
121<td width="80%">
122
123<p>Specify the percentage of the green channel to use
124(default 59).</p>
125</td>
126<td width="0%">
127</td>
128<tr valign="top" align="left">
129<td width="10%"></td>
130<td width="3%">
131
132<p><b>&minus;B</b></p>
133</td>
134<td width="5%"></td>
135<td width="80%">
136
137<p>Specify the percentage of the blue channel to use
138(default 11).</p>
139</td>
140<td width="0%">
141</td>
142</table>
143<a name="SEE ALSO"></a>
144<h2>SEE ALSO</h2>
145<!-- INDENTATION -->
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147 cols="2" cellspacing="0" cellpadding="0">
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149<td width="8%"></td>
150<td width="91%">
151<p><b>pal2rgb</b>(1), <b>tiffinfo</b>(1), <b>tiffcp</b>(1),
152<b>tiffmedian</b>(1), <b>libtiff</b>(3)</p>
153<!-- INDENTATION -->
154<p>Libtiff library home page:
155<b>http://www.remotesensing.org/libtiff/</b></p>
156</td>
157</table>
158<hr>
159</body>
160</html>