Re: Dot Simulation
Re: Dot Simulation
- Subject: Re: Dot Simulation
- From: Hal Hinderliter <email@hidden>
- Date: Thu, 15 Jan 2009 19:49:27 -0600
On Jan 15, 2009, at 7:36 PM, Graeme Gill wrote:
Of course you can try and be clever on a case by case basis if the
source
and sampling have dominant frequencies, to arrange them so that the
beats (aliasing
products/moirè) are not objectionable (ie. by changing screening
angles, camera
angles, distances, etc.)
Graeme's right on the money here - in fact, I'm surprised that no one
in this esteemed collection of luminaries has yet pointed out that the
effect being discussed is not "moiré" at all, but is more accurately
described as "pattern interference." While the unpleasant visual
phenomena created by improperly angled AM screens (moiré) shares some
attributes with pattern interference, moiré occurs independently of
the sort of content being depicted (provided, of course, that enough
dot appears in the conflicting screens).
Stochastic does indeed solve this problem, not specifically because of
its randomness, but because it lacks a regular pattern that would
"beat" against the similar-but-slgithly-different pattern seen in the
subject matter.
My 2 cents, anyway.
Hal
--
Hal Hinderliter Consulting Services
2414 N. 83rd St.
Wauwatosa, WI 53213
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