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Ppmquant User Manual(0)                                Ppmquant User Manual(0)



NAME
       ppmquant - quantize the colors in a PPM image down to a specified number


SYNOPSIS
       ppmquant [-floyd|-fs] ncolors [ppmfile] ppmquant [-floyd|-fs] [-nofloyd|-nofs] -mapfile mapfile [ppmfile]


DESCRIPTION
       This program is part of Netpbm(1).

       ppmquant is obsolete.  All it does now is invoke pnmquant or pnmremap.  You should use one of those programs in
       any new program, or if you are modifying an old program, and your program does not have to work with a  version
       of Netpbm before 9.21 (January 2001).  ppmquant exists only for name compatibility.

       pnmquant  is  fully  backward  compatible with ppmquant without the -mapfile option; pnmremap is fully backward
       compatible with ppmquant with the -mapfile option.

       All options can be abbreviated to their shortest unique prefix.  You may use two hyphens instead of one to des-
       ignate an option.  You may use either white space or equals signs between an option name and its value.

       Except with differences suggested by the syntax synopsis above, ppmquant's function is the same as pnmquant and
       pnmremap.

       Before Netpbm 10.19 (November 2003), ppmquant was a completely separate program from pnmquant, and was  a  bona
       fide PPM program.  That means if you gave it a PGM or PBM image as input, it would process it as if it were PPM
       and generate a PPM output.  Now, since it is really a PNM program, it processes PBM and PGM inputs as what they
       are and produces the same kind of output.

       Note: The reason ppmquant was changed in Netpbm 10.19 is that for some time before that, ppmquant had a serious
       bug that would have been difficult to fix -- it chose the wrong color set.  Maintaining  two  versions  of  the
       same code did not make sense.


SEE ALSO
       pnmquant(1), pnmremap(1), pnmcolormap(1), pamseq(1), ppm(1)


AUTHOR
       Copyright (C) 1989, 1991 by Jef Poskanzer.



netpbm documentation            22 October 2003        Ppmquant User Manual(0)