CentOS 7.0 - man page for pnmquant (centos section 0)
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Pnmquant User Manual(0) Pnmquant User Manual(0)
pnmquant - quantize the colors in a Netpbm image to a smaller set
pnmquant [-center|-meancolor|-meanpixel] [-floyd|-fs] [-nofloyd|-nofs] [-spreadbright-
ness|-spreadluminosity] ncolors [pnmfile]
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 generated 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 continues to exist, but is only a front end
(for name compatibility) to pnmquant.
pnmcolormap(1) , pnmremap(1) , ppmquantall(1) , pamdepth(1) , ppmdither(1) , ppmquant(1) ,
netpbm documentation 22 October 2003 Pnmquant User Manual(0)
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