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

[Keith Purtell <keithpurtell keithpurtell com>]

Here's a link to one portion of the image:

http://i.imgur.com/6RaV68i.jpg


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.