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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