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TIFF2BW(1)             DragonFly 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
       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     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, 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)

       Libtiff library home page: http://www.simplesystems.org/libtiff/

libtiff                        November 2, 2005                     TIFF2BW(1)

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