That looks like "pepper grain". It was more common with Provia than
Velvia, but would occur in both. From what I've been able to
determine, it's caused by surface refraction in the surface of the
film. Fujifilm essentially "frosted" the surface of Velvia and Provia
to help the highlights. With a diffuse light source, there are no
artifacts. With a pinpoint or columnated light source, the light would
refract away from the direction of the scanner's sensor resulting in
black dots.
AG Schnozz
On Sun, Dec 10, 2017 at 11:37 AM, Tina Manley <tmanley@xxxxxxxxx> wrote:
> PESO:
>
> I'm still scanning slides of Italy. Most of the film has been Provia which
> seems to scan fine, but I've run into a series where I used Velvia. That
> shows lots of speckles in the film. I used Vuescan's infrared noise
> removal when I scanned it and I've tried both Neat Image and Define in
> Photoshop. Nothing touches these speckles. Here is an example:
>
> http://www.pbase.com/image/166696968
>
> Enlarged detail from the top left corner:
>
> http://www.pbase.com/tinamanley/image/166696969
>
> Any suggestions on how to get rid of speckles?
>
> Tina
>
> --
> Tina Manley
> www.tinamanley.com
> tina-manley.artistwebsites.com
> http://www.alamy.com/stock-photography/3B49552F-90A0-4D0A-A11D-2175C937AA91/Tina+Manley.html
> --
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Ken Norton
ken@xxxxxxxxxxx
http://www.zone-10.com
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