Re: [Gimp-user] Scanned negatives, moire patterns and GIMP?

[Thorsten Stettin <thorsten stettin gmail com>]

Am 05.12.2014 um 21:34 schrieb Keith Purtell:
> Here's a link to one portion of the image:
>
> http://i.imgur.com/6RaV68i.jpg
Try this via G'MIC: https://www.youtube.com/watch?v=3137dDa6P4s

I hope this helps. :-)
> On 12/4/2014 7:11 PM, Liam R E Quin wrote:
> > >   If they can't resolve this, what are my chances of solving the
> > > problem
> > > with GIMP? I tried a few of the existing filters without visible
> > > results.
> > > My first Google searches haven't turned up a good detailed tutorial on
> > > moire removal.
> >
> > There's a G'MIC filter for it. But it depends on the exact nature of
> > the pattern as to what's best. I get them when scanning colour books,
> > because of the way the books are printed (it's actually unavoidable
> > unless you use a "descreen filter" in the scanner driver, but better
> > to do it in GIMP). For that, separating into layers and using
> > gaussian blur is often best, but another possibility is to use
> > wavelet decomposition and delete that high frequency layers. G'MIC
> > has a filter to do that, too.
> >
> > If you can share a sample I can have a better look.
>
>
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