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tiff2bw - convert a color TIFF
image to greyscale
tiff2bw [ options ] input.tif output.tif
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.
- -c
- 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).
- -r
- 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.
- -R
- Specify the percentage
of the red channel to use (default 28).
- -G
- Specify the percentage of the
green channel to use (default 59).
- -B
- Specify the percentage of the blue
channel to use (default 11).
pal2rgb(1)
, tiffinfo(1)
, tiffcp(1)
,
tiffmedian(1)
, libtiff(3)
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