NAME
      tobw - Convert a 24 bit RLE file to eight
      bits of gray scale value.

 SYNOPSIS
      tobw [ -t ] [ -o outfile ] [ infile ]

 DESCRIPTION
      Tobw converts an image with 24 bit pixel
      values (eight bits each of red, green and
      blue) to eight bits of grayscale information.
      The NTSC Y transform is used.  If the -t flag
      is given, then the monochrome pixel values
      are replicated on all three output channels
      (otherwise, just one channel of eight bit
      data is produced).  If no input file is
      specified, tobw reads from stdin.  If no
      output file is specified with -o, it writes
      the result to stdout.

 SEE ALSO
      to8(1), urt(1), rgb_to_bw(3), RLE(5).

 AUTHOR
      Spencer Thomas

























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