Re: [Gimp-user] A Sad case of regression

[Ofnuts <ofnuts laposte net>]

On 06/17/2013 06:38 AM, Liam R E Quin wrote:
> On Mon, 2013-06-17 at 00:52 +0200, Ofnuts wrote:
> >   if you only do local editing and save the image back with the
> > exact same JPEG quality settings, the "blocks" which no changed pixels
> > very quickly end up producing the very same data as their source in the
> > JPEG file in every editing cycle,
> This depends on the sorts of edits you do.
>
> For example, changing contrast or levels globally, or running a sharpen
> filter, will often accentuate the original jpeg artifacts so that they
> in turn create new artifacts.
>
> (that's why I mentioned levels, curves and sharpen explicitly in the
> post i made somewhere else in this thread).

Yes, this is why I said "local" editing.