TIFF2BW(1)							   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 chan-
       nel, 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  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, 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)



			       October 15, 1995			   TIFF2BW(1)

UNIX/Linux commands referenced on this page:

1. convert
2. red
3. zip