Re: Tech Pan Sample

["Edward Gosfield III" <ogeiii@xxxxxxxxxxxx>]

i think this is posterization, produced somehow from contrast manipulation
in PS.  I have had something similar occur when i play with 'curves' in such
a way that there is a flat spot, or a recurved spot along the curve.  I have
also had it happen when i got to the limits of contrast correction using
'levels', especially in 8 bit.

ted
----- Original Message -----
From: "Jim Allen" <JAllen@NortechVentures.com>
To: <scan@leben.com>
Sent: Friday, March 15, 2002 5:30 PM
Subject: Tech Pan Sample


> Dear group,
>
> Ted offered to help me with an issue that I have scanning Kodak Tech Pan
> film on a Nikon LS-2000.  Therefore, I did some test scans to send to him
> for his opinion, but I thought I would also solicit opinions from others
in
> the group.  I have two samples.  These are sections of scans from 35 mm
Tech
> Pan.  One was scanned with NikonScan 3.1.0.  The other was scanned with a
> demo version of Silverfast.  In each case, I did the simplest scan
possible
> using 12 bit depth.  There was no sharpening.  The scans were done as RGB,
> since I have found that better than grayscale.  Normally, I would then
> convert to grayscale in PS, but in this case I have left them as RGB so
that
> you can see the color cast as well as the "mottling" effect that I have
> referred to.
>
> OK, so if you go to the link you will find thumbs and sections were I cut
> part of the scan out and saved it as jpg file.  The effect that I am
> referring to is a non-smooth transition from light to dark.  You will see
it
> most pronounced in these on the lower hip of the model.  (Yes, these were
> done intentionally as very high contrast.)
>
> I left the color to give any clues, but the effect is still there when
> converted to gray.  Any thoughts would be appreciated.
>
> These are about as mild as it gets, but if you are under 18 or offended by
> artistic nudity, then do not go there.
>
> www.singularimages.com/Scan_Samples.html
>
> Thanks for any help.
>
> Jim
>
>
>
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