1<html> 2<head> 3<meta name="generator" content="groff -Thtml, see www.gnu.org"> 4<meta name="Content-Style" content="text/css"> 5<title>TIFF2BW</title> 6</head> 7<body> 8 9<h1 align=center>TIFF2BW</h1> 10<a href="#NAME">NAME</a><br> 11<a href="#SYNOPSIS">SYNOPSIS</a><br> 12<a href="#DESCRIPTION">DESCRIPTION</a><br> 13<a href="#OPTIONS">OPTIONS</a><br> 14<a href="#SEE ALSO">SEE ALSO</a><br> 15 16<hr> 17<!-- Creator : groff version 1.18 --> 18<!-- CreationDate: Mon Oct 7 17:36:37 2002 --> 19<a name="NAME"></a> 20<h2>NAME</h2> 21<!-- INDENTATION --> 22<p><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></p> 31<a name="SYNOPSIS"></a> 32<h2>SYNOPSIS</h2> 33<!-- INDENTATION --> 34<p><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> [ options ] <i>input.tif 40output.tif</i></p> 41</td> 42</table></p> 43<a name="DESCRIPTION"></a> 44<h2>DESCRIPTION</h2> 45<!-- INDENTATION --> 46<p><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></p> 61<a name="OPTIONS"></a> 62<h2>OPTIONS</h2> 63<!-- TABS --> 64<p><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, <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>−c 81lzw</b> for Lempel-Ziv & 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>−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>−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>−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>−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></p> 143<a name="SEE ALSO"></a> 144<h2>SEE ALSO</h2> 145<!-- INDENTATION --> 146<p><table width="100%" border=0 rules="none" frame="void" 147 cols="2" cellspacing="0" cellpadding="0"> 148<tr valign="top" align="left"> 149<td width="8%"></td> 150<td width="91%"> 151<p><i>pal2rgb</i>(1), <i>tiffinfo</i>(1), <i>tiffcp</i>(1), 152<i>tiffmedian</i>(1), <i>libtiff</i>(3)</p> 153</td> 154</table></p> 155<hr> 156</body> 157</html> 158