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filmscanners: Re: filmscanners: Infrared dust removal accuracy

Lynn wrote:
>Roger wrote:
>>Silver based black and white film won't pass IR, so there's no way to
>>IR dust removal with it.
> Granted that it's not going to be effective for *dust removal*,
> wouldn't IR still be extremely usefull for a badly-scratched
> silver-halide neg?

How does the software determine what is a scratch and what isn't?
The whole point with a chromogenic image is that the image doesn't
appear in the IR channel.  You don't have that with a B&W neg.
I don't think there would be any advantage to an IR channel
compared to a "normal" channel in terms of scratches except
that the scratch *may* be a little more obvious.  The main
problem is that the scratch might also be a fine line of
image detail...


Rob Geraghty harper@wordweb.com


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