src/tiff/html/man/tiff2bw.1.html

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   7 <title>TIFF2BW</title>
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  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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  27 <p>tiff2bw &minus; convert a color <small>TIFF</small> image
  28 to greyscale</p>
  29 </td>
  30 </table>
  31 <a name="SYNOPSIS"></a>
  32 <h2>SYNOPSIS</h2>
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  39 <p><b>tiff2bw</b> [ options ] <i>input.tif
  40 output.tif</i></p>
  41 </td>
  42 </table>
  43 <a name="DESCRIPTION"></a>
  44 <h2>DESCRIPTION</h2>
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  51 <p><i>Tiff2bw</i> converts an <small>RGB</small> or Palette
  52 color <small>TIFF</small> image to a greyscale image by
  53 combining percentages of the red, green, and blue channels.
  54 By default, output samples are created by taking 28% of the
  55 red channel, 59% of the green channel, and 11% of the blue
  56 channel. To alter these percentages, the <b>&minus;R</b>,
  57 <b>&minus;G</b>, and <b>&minus;B</b> options may be
  58 used.</p>
  59 </td>
  60 </table>
  61 <a name="OPTIONS"></a>
  62 <h2>OPTIONS</h2>
  63 <!-- TABS -->
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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
  76 data: <b>&minus;c none</b> for no compression, <b>-c
  77 packbits</b> for the PackBits compression algorithm, <b>-c
  78 zip</b> for the Deflate compression algorithm, <b>-c g3</b>
  79 for the CCITT Group 3 compression algorithm, <b>-c g4</b>
  80 for the CCITT Group 4 compression algorithm, and <b>&minus;c
  81 lzw</b> for Lempel-Ziv &amp; Welch (the default).</p>
  82 </td>
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  84 </td>
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  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
  95 default the number of rows/strip is selected so that each
  96 strip 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>
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 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>
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