PPMQUANTALL

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 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.
      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 environments.

AUTHOR

      Copyright (C) 1991 by Jef Poskanzer.