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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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