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filmscanners: Grain Aliasing at 2700pppi



Grain aliasing and noise has been a regular topic on this list. It should
be--Mark, Rob, I and others have been talking at it hard enough. Without any
spectacular results, I could add. :-
It's a pity that TIFFs can't be sent reasonably on the Net, because I just
ran up against one that makes the "Tiger" I wrote about into a "pussycat."
This new TIFF, done in Vuescan with 6 passes because Miraphoto couldn't
handle it, has grain aliasing in every square milimeter! True, it was
under-exposed in existing artificial light, hand-held at probably 1/15th or
1/30th tops, with a Pentax 1.8 lens. So what?

"There probably isn't enough 'picture there' to make a picture, there," you
might say. You've heard it before, said it before, and so have I, more than
once. But the thing is, there *is* quite a bit of picture there, and the
Scanwit "sees" it. Getting it *out of there* and making it presentable is
the difficult part.

Most people I know would say, "Give it up, man." Well fine, but I don't
think my daughter will be graduating from highschool any time again soon.
It's been 22 years since her last go. :-)

Every discussion we've had on this list about G-A begs the question "How to
deal with it?" We know (or do we?) what causes grain aliasing and/or noise,
what films to use in future, what scanners to buy in future, et cetera. But
how does one get those hundreds of blue-green pixels out of the dark areas
and the red-brown pixels out of the flesh-tones today, this afternoon?

That's my question, and I'm stickin' to it. :-)

Best regards--LRA

PS--BTW, have you noticed that using a soft brush and Cloning smoothes out
those offending pixels? Not a lot of help unless one wants to "repaint" the
whole picture, but it might be a start. Or not.


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