indexed 256 color palette selection

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#1339

From: N7YVM
Date: Mon, 07 Sep 1992 21:54

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 Hello!


  Ive got a bunch of raw images, i.e. image that are stored as memory as
  separate r g and b images, each byte being between 0 thru 255 and
  indicating intensity...

  What I need is an algorithm that selects the best indexed 256 color
  palette for a particular image.

  In other words I got some jpegs I need to convert to GIFS :)

  Does anyone know of ANY algorithms that select such palettes? I think
  the optimum palette would have each palette entry used an equal number
  of times? I have developed an algorithm that does this for greyscales,
  but cant seem to find one that handles rgb palettes..  Thanks if you
  have any advice to offer me !!

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Path: arc1-ca.pugleaf.net!sparky!uunet!sun-barr!olivea!mintaka.lcs.mit.edu!ai-lab!hal.gnu.ai.mit.edu!rwed
From: rwed@hal.gnu.ai.mit.edu (N7YVM)
Newsgroups: comp.os.msdos.programmer,alt.graphics.pixutils
Subject: indexed 256 color palette selection
Message-ID: <27589@life.ai.mit.edu>
Date: 7 Sep 92 21:54:43 GMT
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