Jan Steinman wrote:
> According to theory, sampling at twice the highest line frequency will
> perfectly reproduce a SINE function -- one in which the change from white
> to black progresses through various shades of gray in the manner of a sine
> wave.
Isn´t it this the way they use to perform MFT measurings?
> But no matter how many lines per mm you can sample, if your sampling
> resolution is greater than the film grain, you aren't going to improve
> things by increasing the sampling frequency.
>
> In my experience with the Nikon LS-2000, I can "sample the grain" in film
> of about ASA 400 and above, therefore more samples aren't going to improve
> the output of such scans one bit.
If color films are scaned, it is difficult to determine, what are the
grain. Color film imagess are build out of "clouds of dye", there
borders are more difficult to determin than the sharp corners of B&W
film grain.
Regards
Richard
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