TIFF2BW(1) LibTIFF 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 im-
age 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 compress
Specify a compression scheme to use when writing image data: -c
none for no compression, -c packbits for the PackBits compres-
sion 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, -c lzw for Lempel-Ziv &
Welch (the default).
-r striprows
Write data with a specified number of rows per strip; by default
the number of rows/strip is selected so that each strip is ap-
proximately 8 kilobytes.
-R redperc
Specify the percentage of the red channel to use (default 28).
-G greenperc
Specify the percentage of the green channel to use (default 59).
-B blueperc
Specify the percentage of the blue channel to use (default 11).
SEE ALSO
pal2rgb (1), tiffinfo (1), tiffcp (1), tiffmedian (1), libtiff (3tiff),
AUTHOR
LibTIFF contributors
COPYRIGHT
1988-2023, LibTIFF contributors
4.5 Nov 23, 2023 TIFF2BW(1)
Generated by dwww version 1.15 on Tue Jun 25 07:52:42 CEST 2024.