TIFF2BW(1) User Commands TIFF2BW(1)

NAME

tiff2bw - convert a color TIFF image to greyscale

SYNOPSIS

tiff2bw [ 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 percentages, 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 ALSO

pal2rgb(1), tiffinfo(1), tiffcp(1), tiffmedian(1), libtiff(3)

Libtiff library home page: http://www.simplesystems.org/libtiff/

libtiff November 2, 2005 TIFF2BW(1)