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NAME

       ppmquantall  -  run  ppmquant  on a bunch of files all at once, so they
       share a common colormap

SYNOPSIS

       ppmquantall [-ext extension] ncolors ppmfile ...

DESCRIPTION

       Takes a bunch of portable pixmap as input.  Chooses ncolors  colors  to
       best  represent  all of the images, maps the existing colors to the new
       ones, and overwrites the input files with the new quantized versions.

       If you don’t want to overwrite your input files, use the  -ext  option.
       The  output  files  are  then named the same as the input files, plus a
       period and the extension text you specify.

       Verbose explanation: Let’s say you’ve got a dozen pixmaps that you want
       to  display  on  the screen all at the same time.  Your screen can only
       display 256 different colors,  but  the  pixmaps  have  a  total  of  a
       thousand  or  so  different colors.  For a single pixmap you solve this
       problem with ppmquant; this script solves it for multiple pixmaps.  All
       it  does is concatenate them together into one big pixmap, run ppmquant
       on that, and then split it up into little pixmaps again.

       (Note that another way to solve this problem is to pre-select a set  of
       colors  and then use ppmquant’s -map option to separately quantize each
       pixmap to that set.)

SEE ALSO

       ppmquant(1), ppm(5)

AUTHOR

       Copyright (C) 1991 by Jef Poskanzer.

                                 27 July 1990                   ppmquantall(1)