Tom Rittenhouse mused:
>
> Actually, I understand that film is capable of recording about
> 10,000 dots per inch. Of course if you scan it at that
> resolution you would be scanning individual grains of silver. I
> imagine much image data would be lost in moire patterns.
Not at all. Moire patterns only occur when two regularly-spaced
sequences interfere (a very good example of an aliasing artifact).
The distribution of film grains in an emulsion is fairly random
(pretty close to a Poisson distribution, to a first approximation).
There is no regular spacing, so there are no interference phenomena.
Whether film behaves as a point-sampled medium or area-sampled
is a whole different question, too. This one could run and run ...
--
John Francis . . . . . . . . . . (650) 429-4427
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