Pnmquant User Manual(0)				       Pnmquant User Manual(0)



NAME
       pnmquant - quantize the colors in a Netpbm image to a smaller set


SYNOPSIS
       pnmquant	 [-center|-meancolor|-meanpixel] [-floyd|-fs] [-nofloyd|-nofs]
       [-spreadbrightness|-spreadluminosity] ncolors [pnmfile]


DESCRIPTION
       This program is part of Netpbm(1).

       pnmquant reads a PNM image as input.  It chooses ncolors colors to best
       represent  the  image,  maps  the  existing colors to the new ones, and
       writes a PNM image as output.

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

       This program is simply a combination of pnmcolormap and pnmremap, where
       the colors of the input are remapped using a color map which is	gener-
       ated  from  the	colors	in that same input.  The options have the same
       meaning as in those programs.  See their	 documentation	to  understand
       pnmquant.

       It is much faster to call pnmcolormap and pnmremap directly than to run
       pnmquant.  You save the overhead of the Perl interpreter	 and  creating
       two extra processes.  pnmquant is just a convenience.

       pnmquant did not exist before Netpbm 9.21 (January 2001).  Before that,
       ppmquant did the same thing, but only on PPM images.  ppmquant  contin-
       ues  to	exist,	but  is	 only  a front end (for name compatibility) to
       pnmquant.


SEE ALSO
       pnmcolormap(1), pnmremap(1), ppmquantall(1), pamdepth(1), ppmdither(1),
       ppmquant(1), pnm(1)



netpbm documentation		22 October 2003	       Pnmquant User Manual(0)