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Mailinglist:PanoTools
Sender:Paul D. DeRocco
Date/Time:2005-Oct-27 21:32:05
Subject:RE: Re: dynamic range and noise (yet again)

Thread:


PanoTools: RE: Re: dynamic range and noise (yet again) Paul D. DeRocco 2005-Oct-27 21:32:05
> From: Erik Krause
>
> However, the technique has it's limits: Camera shake, moving objects
> and so on. And of course it's easier to extend dynamic range by
> blending multiple exposures: To gain one f-stop dynamic range you
> need to double the number of images.

No, you have to quadruple the number. The sum of the image data goes up by a
factor of four, and the sum of the uncorrelated noise goes up by a factor of
two, yielding a factor of two S/N improvement.

--

Ciao,               Paul D. DeRocco
Paul                mailto:#removed#



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