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NAME
     24to8 - convert a 24- or  32-bit  rasterfile  to  an  8  bit
     rasterfile suitable for X11

SYNOPSIS
     24to8  [ -v ] [ -q ] [ -large ] [ inrasf | - ] [ outrasf ]

DESCRIPTION
     24to8 takes as input a 24-  or  32-bit  Sun  rasterfile  and
     reduces  the  depth  of  the  image, from truecolor to 8 bit
     colormapped index color.  24to8 uses Floyd/Steinberg dither-
     ing to achieve high quality images.  By default, this filter
     assumes that the color cube in the static colormap is of the
     form 5x5x5 (5 reds, 5 greens, and 5 blues).

     If both filenames are missing, the source rasterfile is read
     from  stdin  and the output rasterfile is written to stdout.
     If there is only one filename, then it is interpreted as the
     input  rasterfile.   To  have  a named output rasterfile and
     still read the input rasterfile from stdin, use a  dash  (-)
     in place of the input filename.

     24to8 interprets the input rasterfile as a packed 24-bit BGR
     format  or  an unpacked 32-bit XBGR-format; the standard Sun
     ordering for the red, green, and blue channels.  This is the
     opposite  of  older versions of this program, which used the
     RGB or XBGR format.  Older image files with the  RGB  format
     should  be  passed  through  the redxblue(1) filter prior to
     dithering with 24to8.


OPTIONS
     -v   Verbose mode will print information as it processes the
          image.  (The default is to be silent.)

     -q   Query (prints list of options)

     -large
          Dithers into a static colormap with a large color  cube
          of the form 5x9x5.

SEE ALSO
     redxblue(1)

NOTES
     The OpenWindows environment may no longer be supported in  a
     future  release.  You may want to migrate to CDE, the Common
     Desktop Environment.

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