POV-Ray : Newsgroups : povray.unofficial.patches : JPEG input/output for Pov 3.1e : Re: JPEG input/output for Pov 3.1e Server Time
3 Sep 2024 02:17:02 EDT (-0400)
  Re: JPEG input/output for Pov 3.1e  
From: PoD
Date: 29 Jun 1999 13:26:36
Message: <3779032B.ADDE1EC3@merlin.net.au>
Ron Parker wrote:
> 
> On Mon, 28 Jun 1999 17:28:59 -0500, Mike <Ama### [at] aolcom> wrote:
> 
> >The long and short of it for me is that you will never get the
> >compression of JPEG out of PNG.  While LWZ compression can cut a file in
> >half, a JPEG file can reduce it by a factor of 10 or more without too
> >much artifacting.  If more projects like the IMP start to show up, some
> >kind of compression scheme is going to be essential.
> 
> PNG doesn't use LZW compression (no sane person would, these days).
> It uses Huffman compression, after performing a DCT to get the data
> into the frequency domain.

I thought that was what JPEG does and that PNG uses deflate without DCT.

PoD.


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