PPMQVGA

NAME

      ppmqvga - 8 plane quantization

SYNOPSIS

      ppmqvga [ options ] [ input file ]

DESCRIPTION

      ppmqvga quantizes PPM files to 8 planes, with optional Floyd-Steinberg
      dithering.  Input is a PPM file from the file named, or standard input
      if no file is provided.
    Options
      -d dither. Apply Floyd-Steinberg dithering to the data
      -q quiet. Produces no progress reporting, and no terminal output
      unless and error occurs.
      -v verbose. Produces additional output describing the number of colors
      found, and some information on the resulting mapping. May be repeated
      to generate loads of internal table output, but generally only useful
      once.

EXAMPLES

      ppmqvga -d my_image.ppm | ppmtogif >my_image.gif
      tgatoppm zombie.tga | ppmqvga | ppmtotif > zombie.tif

DEMONSTRATION

      Let a.ppm be a portable pixmap.
      The following command will quantize it to 8 planes:
	ppmmerge ppmqvga a.ppm > aqvga.ppm

BEFORE

AFTER

SEE ALSO

      ppmquant

DIAGNOSTICS

      Error messages if problems, various levels of optional progress
      reporting.

LIMITATIONS

      none known.

AUTHOR

      Original by Lyle Rains (lrains@netcom.com) as ppmq256 and ppmq256fs
      combined, documented, and enhanced by Bill Davidsen
      (davidsen@crd.ge.com)

Copyright

      Copyright 1991,1992 by Bill Davidsen, all rights reserved.  The
      program and documentation may be freely distributed by anyone in
      source or binary format. Please clearly note any changes.