[vorbis] Image compression thread

Aardvaak Aardvaak at ifrance.com
Mon Jul 2 06:10:09 PDT 2001



Hello Simonèiè,
And what about Lossless JPEG? What are its pros and cons compared to PNG?
BTW, what is alpha channel?

Jernej Simonèiè a écrit:
> Hello Vrykolaka,
> 
> 2. julij 2001, 13:37:27, you wrote:
> > Where it is better than GIF? It is lossless too? Smaller? What about JPEG 2000? Lossless JPEG?
> 
> PNG is lossless, produces smaller files than GIF, and supports
> grayscale images from 1 to 16 bit, paletted images from 2 to 256
> colors/palette entries, color images up to 48 bits, transparent color
> setting with paletted images, alpha channel (up to 16 bits) with
> others.
> JPEG2000 is new version of JPEG. It's still lossy, but produces better
> quality images than JPEG at the same size.

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