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<meta name="generator" content="groff -Thtml, see www.gnu.org">
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<title>TIFF2BW</title>
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TIFF2BW
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NAME
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SYNOPSIS
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DESCRIPTION
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OPTIONS
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SEE ALSO
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NAME
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cols="2" cellspacing="0" cellpadding="0">
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tiff2bw − convert a color <small>TIFF</small> image
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to greyscale
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SYNOPSIS
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cols="2" cellspacing="0" cellpadding="0">
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tiff2bw [ options ] input.tif
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output.tif
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DESCRIPTION
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cols="2" cellspacing="0" cellpadding="0">
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Tiff2bw converts an <small>RGB</small> or Palette
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color <small>TIFF</small> image to a greyscale image by
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combining percentages of the red, green, and blue channels.
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By default, output samples are created by taking 28% of the
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red channel, 59% of the green channel, and 11% of the blue
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channel. To alter these percentages, the −R,
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−G, and −B options may be
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used.
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OPTIONS
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cols="5" cellspacing="0" cellpadding="0">
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−c
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Specify a compression scheme to use when writing image
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data: −c none for no compression, −c
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packbits for the PackBits compression algorithm,
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−c zip for the Deflate compression algorithm,
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−c g3 for the CCITT Group 3 compression
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algorithm, −c g4 for the CCITT Group 4
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compression algorithm, and −c lzw for
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Lempel-Ziv & Welch (the default).
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−r
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Write data with a specified number of rows per strip; by
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default the number of rows/strip is selected so that each
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strip is approximately 8 kilobytes.
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−R
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Specify the percentage of the red channel to use
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(default 28).
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−G
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Specify the percentage of the green channel to use
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(default 59).
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−B
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Specify the percentage of the blue channel to use
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(default 11).
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SEE ALSO
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cols="2" cellspacing="0" cellpadding="0">
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pal2rgb(1), tiffinfo(1), tiffcp(1),
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tiffmedian(1), libtiff(3)
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Libtiff library home page:
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http://www.remotesensing.org/libtiff/
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</body>
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</html>
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