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 compress
- 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, -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 approximately 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).
pal2rgb (1), tiffinfo (1), tiffcp (1),
tiffmedian (1), libtiff (3tiff),
1988-2023, LibTIFF contributors