Lynn wrote:
> Rob's right, of course; since IR won't pass through silver
> halides, it won't have much reference for repairing a BW neg.
Well, let's be more specific about this - scanning a B&W neg
in RGB looks the same as scanning it in IR. It's *not* simply
black in IR. I haven't looked at the comparison in detail
to see if there's any minor differences like focus or
contrast.
> OTOH, it seems like it would create a perfect "mask" if
> the neg were scratched, because the IR *would* pass
> through the scratches.
No. See above. An area of pure white on the neg (black in the
original scene) will pass IR just as effectively as a scratch.
So as I said earlier, you can't tell what is image and what is
a scratch. The "scratch" could be real detail like a fine wire
across bright sky.
Rob
Rob Geraghty harper@wordweb.com
