[ILUG] SDMI initiative

[Niall O Broin]

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