On Sat, 30 Jun 2001 11:19:27 -0400 rafeb (rafeb@channel1.com) wrote:
> I also don't really believe in film-grain aliasing --
> film grain is essentially non-periodic, or, more
> accurately "white noise" -- ie, containing
> an even distribution of frequency element
It's not though - it's pink noise, biased toward a range of frequencies
(grain sizes) which depend on material, exposure and process. How else do
you account for grain aliasing (or whatever it is) often manifesting in
particular areas of an image of similar tone/density, but not elsewhere?
Regards
Tony Sleep
- Online portfolio & exhibit; + film scanner
info & comparisons
