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ppmquantall(1)					ppmquantall(1)

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

SYNOPSIS
       ppmquantall ncolors ppmfile ...

DESCRIPTION
       Takes a bunch of portable pixmap as input.  Chooses  ncol-
       ors  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.

       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)

BUGS
       It's a csh script.  Csh scripts are not portable to System
       V.  Scripts in general are not portable to non-Unix  envi-
       ronments.

AUTHOR
       Copyright (C) 1991 by Jef Poskanzer.

			   27 July 1990				1

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