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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> | |
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<a name="NAME"></a> | |
<h2>NAME</h2> | |
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<p>tiff2bw − convert a color <small>TIFF</small> image | |
to greyscale</p> | |
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<a name="SYNOPSIS"></a> | |
<h2>SYNOPSIS</h2> | |
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<p><b>tiff2bw</b> [ <i>options</i> ] <i>input.tif | |
output.tif</i></p> | |
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<a name="DESCRIPTION"></a> | |
<h2>DESCRIPTION</h2> | |
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<p><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> | |
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<a name="OPTIONS"></a> | |
<h2>OPTIONS</h2> | |
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<p><b>−c</b></p> | |
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<p>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> | |
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<p><b>−r</b></p> | |
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<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> | |
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<p><b>−R</b></p> | |
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<p>Specify the percentage of the red channel to use | |
(default 28).</p> | |
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<p><b>−G</b></p> | |
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<p>Specify the percentage of the green channel to use | |
(default 59).</p> | |
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<p><b>−B</b></p> | |
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<p>Specify the percentage of the blue channel to use | |
(default 11).</p> | |
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<a name="SEE ALSO"></a> | |
<h2>SEE ALSO</h2> | |
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<p><b>pal2rgb</b>(1), <b>tiffinfo</b>(1), <b>tiffcp</b>(1), | |
<b>tiffmedian</b>(1), <b>libtiff</b>(3)</p> | |
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<p>Libtiff library home page: | |
<b>http://www.remotesensing.org/libtiff/</b></p> | |
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