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From: ken@turtlevax.UUCP (Ken Turkowski)
Newsgroups: net.graphics,net.math
Subject: Stochastic Sampling and Distributed Ray Tracing
Message-ID: <843@turtlevax.UUCP>
Date: Mon, 29-Jul-85 20:47:11 EDT
Article-I.D.: turtleva.843
Posted: Mon Jul 29 20:47:11 1985
Date-Received: Thu, 1-Aug-85 20:13:19 EDT
Reply-To: ken@turtlevax.UUCP (Ken Turkowski)
Organization: CADLINC, Inc. @ Menlo Park, CA
Lines: 16
Keywords: aliasing, sampling, Shannon/Nyquist Sampling Theorem
Xref: linus net.graphics:935 net.math:1784

This year's SIGGRAPH impressed on me the profundity of stochastic
sampling on the aliasing problem.  In a nutshell, distributed ray
tracing and stochastic sampling perform sampling on a random (e.g.
Poisson disk) rather than regular grid.  The result is that the regular
artifacts of aliasing are instead converted into white noise (with an
appropriate probabilistic distribution of sampling points), which is
less apt to be noticed by the eye.

I suspect that the aliasing energy is equal to the white noise energy,
and that the signal energy is the same.  Is there a theory to back this
up?  Any references to peripheral literature related to the subject?
-- 

Ken Turkowski @ CADLINC, Menlo Park, CA
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