On Thu, Sep 28, 2000 at 08:37:04AM +0100, Colm Buckley wrote:
>> > However, JPEG uses a similar kind of compression (psycho-visual
> > model ?), discarding information that the eye doesn't take much
> > account of, but you will surely see the effects of repeated
> > compression/decompression with JPEG.
>> No, you don't!
Fair enough - after I sent that, I did wonder about repeating
compression-decompression cycles without ANY other changes. This is
analagous to our discussion about SDMI - something else. Where you will see
JPEG artefacts becoming intrusive is when you read a JPEG file into
Photoshop / GIMP, manipulate it in some way, and then re-compress it.
Regards,
Niall
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