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TIFF2BW
TIFF2BW
NAME
SYNOPSIS
DESCRIPTION
OPTIONS
SEE ALSO
NAME
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tiff2bw − convert a color TIFF image
to greyscale
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SYNOPSIS
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tiff2bw [ options ] input.tif
output.tif
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DESCRIPTION
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Tiff2bw converts an RGB or Palette
color TIFF 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 −R,
−G, and −B options may be
used.
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OPTIONS
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−c
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Specify a compression scheme to use when writing image
data: −c none for no compression, −c
packbits for the PackBits compression algorithm,
−c zip for the Deflate compression algorithm,
−c g3 for the CCITT Group 3 compression
algorithm, −c g4 for the CCITT Group 4
compression algorithm, and −c lzw for
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
default the number of rows/strip is selected so that each
strip is approximately 8 kilobytes.
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−R
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Specify the percentage of the red channel to use
(default 28).
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−G
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Specify the percentage of the green channel to use
(default 59).
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−B
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Specify the percentage of the blue channel to use
(default 11).
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SEE ALSO
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pal2rgb(1), tiffinfo(1), tiffcp(1),
tiffmedian(1), libtiff(3)
Libtiff library home page:
http://www.remotesensing.org/libtiff/
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