Archived posting to the Leica Users Group, 2001/07/24

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Subject: RE: [Leica] Scanning
From: "Austin Franklin" <darkroom@ix.netcom.com>
Date: Tue, 24 Jul 2001 19:52:02 -0400
 
> > Noise is ABSOLUTELY one of the two major
> > pieces of calculating dynamic range (the other
> > being amplitude of the signal).  If you don't
> > know that, I believe you don't really understand
> > what actual dynamic range is.
>
> If you recognize noise (or its absence), you can remove it.  This
> is how the GPS
> system manages to receive signals from satellites that are weaker
> than the noise
> surrounding them.  This is also how multipass scanning improves
> dynamic range
> beyond what the nominal S/N ratio would predict.

I know how multi-pass scanners work, thanks.  What does that have to do with
what I said?  BTW, multi-pass scanning does not remove the noise, it can
only reduces it.