1<!-- Creator : groff version 1.18.1 --> 2<!-- CreationDate: Sat Feb 24 18:37:19 2007 --> 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> 21<!-- INDENTATION --> 22<table width="100%" border=0 rules="none" frame="void" 23 cols="2" cellspacing="0" cellpadding="0"> 24<tr valign="top" align="left"> 25<td width="8%"></td> 26<td width="91%"> 27<p>tiff2bw − convert a color <small>TIFF</small> image 28to greyscale</p> 29</td> 30</table> 31<a name="SYNOPSIS"></a> 32<h2>SYNOPSIS</h2> 33<!-- INDENTATION --> 34<table width="100%" border=0 rules="none" frame="void" 35 cols="2" cellspacing="0" cellpadding="0"> 36<tr valign="top" align="left"> 37<td width="8%"></td> 38<td width="91%"> 39<p><b>tiff2bw</b> [ <i>options</i> ] <i>input.tif 40output.tif</i></p> 41</td> 42</table> 43<a name="DESCRIPTION"></a> 44<h2>DESCRIPTION</h2> 45<!-- INDENTATION --> 46<table width="100%" border=0 rules="none" frame="void" 47 cols="2" cellspacing="0" cellpadding="0"> 48<tr valign="top" align="left"> 49<td width="8%"></td> 50<td width="91%"> 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>−R</b>, 57<b>−G</b>, and <b>−B</b> options may be 58used.</p> 59</td> 60</table> 61<a name="OPTIONS"></a> 62<h2>OPTIONS</h2> 63<!-- TABS --> 64<table width="100%" border=0 rules="none" frame="void" 65 cols="5" cellspacing="0" cellpadding="0"> 66<tr valign="top" align="left"> 67<td width="10%"></td> 68<td width="3%"> 69 70<p><b>−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>−c none</b> for no compression, <b>−c 77packbits</b> for the PackBits compression algorithm, 78<b>−c zip</b> for the Deflate compression algorithm, 79<b>−c g3</b> for the CCITT Group 3 compression 80algorithm, <b>−c g4</b> for the CCITT Group 4 81compression algorithm, and <b>−c lzw</b> for 82Lempel-Ziv & Welch (the default).</p> 83</td> 84<td width="0%"> 85</td> 86<tr valign="top" align="left"> 87<td width="10%"></td> 88<td width="3%"> 89 90<p><b>−r</b></p> 91</td> 92<td width="5%"></td> 93<td width="80%"> 94 95<p>Write data with a specified number of rows per strip; by 96default the number of rows/strip is selected so that each 97strip is approximately 8 kilobytes.</p> 98</td> 99<td width="0%"> 100</td> 101<tr valign="top" align="left"> 102<td width="10%"></td> 103<td width="3%"> 104 105<p><b>−R</b></p> 106</td> 107<td width="5%"></td> 108<td width="80%"> 109 110<p>Specify the percentage of the red channel to use 111(default 28).</p> 112</td> 113<td width="0%"> 114</td> 115<tr valign="top" align="left"> 116<td width="10%"></td> 117<td width="3%"> 118 119<p><b>−G</b></p> 120</td> 121<td width="5%"></td> 122<td width="80%"> 123 124<p>Specify the percentage of the green channel to use 125(default 59).</p> 126</td> 127<td width="0%"> 128</td> 129<tr valign="top" align="left"> 130<td width="10%"></td> 131<td width="3%"> 132 133<p><b>−B</b></p> 134</td> 135<td width="5%"></td> 136<td width="80%"> 137 138<p>Specify the percentage of the blue channel to use 139(default 11).</p> 140</td> 141<td width="0%"> 142</td> 143</table> 144<a name="SEE ALSO"></a> 145<h2>SEE ALSO</h2> 146<!-- INDENTATION --> 147<table width="100%" border=0 rules="none" frame="void" 148 cols="2" cellspacing="0" cellpadding="0"> 149<tr valign="top" align="left"> 150<td width="8%"></td> 151<td width="91%"> 152<p><b>pal2rgb</b>(1), <b>tiffinfo</b>(1), <b>tiffcp</b>(1), 153<b>tiffmedian</b>(1), <b>libtiff</b>(3)</p> 154<!-- INDENTATION --> 155<p>Libtiff library home page: 156<b>http://www.simplesystems.org/libtiff/</b></p> 157</td> 158</table> 159<hr> 160</body> 161</html> 162