AW: [vorbis] Image compression thread

[Burgwedel Friedrich]

PNG...
- is free to use, no patents, open source
- is lossless, with compression superior to GIF (using zlib)
- supports palette and direct color
- supports b/w from 1 to 16 bit/p
- supports direct color from 24 to 48 bits/p
- supports palette color with 256 entries
- supports alpha blending with 8 and 16 bits/p
- supports palette alpha
- supports (compressed) tags, gamma, rendering intent, physical size,
picture offset, ...
- supports 2D-interlace
- does not support wavelet compression (aka jpeg2000)

...and probably much more...

> -----Ursprüngliche Nachricht-----
> Von: Vrykolaka [mailto:Empyree at Empyree.org]
> Gesendet: Montag, 2. Juli 2001 13:37
> An: vorbis at xiph.org
> Betreff: [vorbis] Image compression thread
> 
> 
> David Balazic a écrit:
> > Uh, should I send you a GIF and JPEG version of the same picture,
> > where the GIF is both smaller AND better ?
> > 
> > JPEG is for natural pictures ( like photos ) ,
> > whil GIF is for "technical" pictures ( text and object that have
> > simple color, without gradients ).
> > 
> > JPEG beats GIF on natural,
> > GIF beats JPEG on technical.
> > 
> > ... and PNG is better than GIF :-)
> Where it is better than GIF? It is lossless too? Smaller? 
> What about JPEG 2000? Lossless JPEG?
> 
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