tiff2bw¶
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 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).
See also¶
pal2rgb (1), tiffinfo (1), tiffcp (1), tiffmedian (1), libtiff (3tiff),