TIFF2BW(1)TIFF2BW(1)NAMEtiff2bw - convert a color TIFF image to greyscale
SYNOPSIStiff2bw [ options ] input.tif output.tif
DESCRIPTION
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 per
centages, the -R, -G, and -B options may be used.
OPTIONS-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).
SEE ALSOpal2rgb(1), tiffinfo(1), tiffcp(1), tiffmedian(1),
libtiff(3)
October 15, 1995 TIFF2BW(1)
