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TIFF2BW(1)		    General Commands Manual		    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     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 ap-
	      proximately 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)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | SEE ALSO

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