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RedHat 9 (Linux i386) - man page for tiff2bw (redhat section 1)

TIFF2BW(1)			     General Commands Manual			       TIFF2BW(1)

       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 per-
       centages 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     Specify a compression scheme to use when writing image data: -c none  for  no  com-
	      pression,  -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, 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).

       pal2rgb(1), tiffinfo(1), tiffcp(1), tiffmedian(1), libtiff(3)

					 October 15, 1995			       TIFF2BW(1)

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