From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <f61a32e00d89b34c170983d55c3873e6@proxima.alt.za>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] PNG and APE (cntd)
Date: Thu, 27 Apr 2006 19:51:33 +0200
From: lucio@proxima.alt.za
In-Reply-To: <44506363.3070407@gmail.com>
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Cc: eugene@dynagen.co.za
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> I don't know if I understood correctly your question, but although GIF
> uses LZW instead of zlib (LZ77 iirc), it can stand only for 256
> different colors - hence it my be smaller than PNG, as PNG allows 32bit
> colors fine (being 8 for alpha).

The question was poorly phrased.  But yes, the comparison is between
PNG and GIF, specifically, because if baffled me when somebody showed
me figures that suggested the same image in PNG was larger than in
GIF.

I can only presume that PNG encoders increase the pixel depth, for
whatever reason.

And, BTW, PNG allows 16-bit per colour, a 48-bit depth per pixel.
Thanks to libpng, my "npng" can render these as 24-bit images.

++L