Ah-hah! That makes perfect sense. The speckles are too bright and pure to
come from the film itself. It's reasonable to assume they're an electronic
artifact, and aliasing is the likely culprit. That also explains why boosting
the black point will reduce them but not eliminate them. They're so bright
that you need to throw away a lot of shadow detail to hide them. Thanks, Tony.
That still leaves the question of what to do about them - short of waiting for
a 6000 dpi scanner, of course.
Paul
-----Original Message-----
From: TonySleep@halftone.co.uk [mailto:TonySleep@halftone.co.uk]
Sent: Thursday, August 02, 2001 12:18 PM
To: filmscanners@halftone.co.uk
Subject: RE: filmscanners: Supra 400 shadows
On Wed, 1 Aug 2001 11:44:30 -0700 Paul Chefurka
(Paul_Chefurka@pmc-sierra.com) wrote:
> I have the exact same problem with Supra 400 - red and green speckles in
> the shadows. Like you, I can't get them to disappear without blowing
> away a lot of shadow detail. I don't know if a drum scan would solve
> this or not - I've seen the same problem on both my SS4000 and my new
> LS-4000, so I have my doubts.
This is likely to be grain aliasing. Where exposure is slight, there aren't
many dye clouds (grains), and if they are of a size to alias individual
pixels or small groups, false colour is the outcome.
Regards
Tony Sleep
- Online portfolio & exhibit; + film scanner info
& comparisons
