Thanks Chuck, a few other avenues to explore.
...Wayne
> Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx> wrote:
>
> Ctein devotes several pages to comparison of descreening methods for
> removing half-tone dots in his book "Digital Restoration from Start to
> Finish". This is the second edition, I have the first one.
> <http://www.amazon.com/Digital-Restoration-Start-Finish-Second/dp/0240812
> 085/ref=sr_1_1?ie=UTF8&s=books&qid=1274705735&sr=1-1>
>
> He shows (in increasing order of effectiveness): Dust & Scratches
> filter, Gaussian Blur, Box Blur and Focus Magic.
> <http://focusmagic.com/> The Focus Magic results do look almost magical
>
> in comparison after carefully adjusting the correction radius. The dots
>
> disappear and the image is much sharper.
>
> But if the regular grain pattern is caused by paper surface texture
> pattern he recommends Neat Image which is his choice for a digital image
>
> noise reducer. Its proper use requires adjusting the high, mid and low
> frequency filters to the specific paper pattern without filtering real
> detail in the image.
>
> Chuck Norcutt
>
>
> Wayne Harridge wrote:
> > Does anyone on the list have any experience of descreening scanned
> images ?
> >
> > A friend wants to produce the best print possible from a scan of a
> printed
> > photograph, it looks like it might be from a newspaper/magazine. He
> doesn't
> > have access to the original but has a scan made by the State Library
> of
> > Victoria as a starting point. The print screen seems to be pretty
> well
> > resolved in the scan which was done at 300dpi from the approx. 10"x8"
> > printed image.
> >
> > I have uploaded the scan here:
> > http://lrh.structuregraphs.com/images/roper.jpg (about 6Mb)
> >
> > Any suggestions welcome.
> >
> > ...Wayne
> >
> > Wayne Harridge
> > http://lrh.structuregraphs.com/
> >
> >
> --
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...Wayne
Wayne Harridge
http://lrh.structuregraphs.com
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