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[filmscanners] Re: Epson Printing Post Scanning...continued



I'll reply to you in more detail in private mail.

One of the principle advantages of the 4000 dpi native resolution is
that it should reduce grain aliasing due to the frequency of the CCD
elements relative to film grain.

Film grain seems to be aliased by scanners in the 2400-2900 dpi range
due to its frequency.  Sure some films would be more likely to manifest
it during scanning since not all film has the same grain or dye cloud
size, and newer films would tend toward smaller grain, but I have found
overall that the SS4000+ (and I assume this is due to the resolution
more than anything else), has little to no grain aliasing.

As Kennedy has discussed, grain aliasing is also reduced if the correct
use of optical filtering occurs, which in this case would be slight
defocusing.  Have you attempted very slightly defocusing the original
scan and then using unsharp masking to recover the focus of the correct
frequency ranges, as he suggested?

Art

HMSDOC@aol.com wrote:

> I think my problem in producing prints is grain aliasing.  It seems worse on
> some films compared to others, when I look carefully I can see it in the scan
> and sharpening tends to make it worse.
>
> Assuming that is what it is, then what is the best way to deal with it, fix
> it, or avoid it.  Do different brands of 4000 dpi scanners tend to accentuate
> the problem more than others?
>
> Howard


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