[vorbis] Image compression thread

[Jernej Simonèiè]

Hello Vrykolaka,

2. julij 2001, 13:37:27, you wrote:

> 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?

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.


-- 
Jernej Simoncic, jernej.simoncic at guest.arnes.si
http://www2.arnes.si/~sopjsimo/
ICQ: 26266467

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