Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!uflorida!stat!fsu!prism!gg10
From: gg10@prism.gatech.EDU (Galloway, Greg)
Newsgroups: comp.graphics
Subject: Re: Aliasing question
Message-ID: <3506@hydra.gatech.EDU>
Date: 16 Nov 89 01:06:58 GMT
References: <44100007@uicsrd.csrd.uiuc.edu>
Organization: Georgia Institute of Technology
Lines: 18

In article <44100007@uicsrd.csrd.uiuc.edu>, shirley@uicsrd.csrd.uiuc.edu writes:
> I have a theoretical question for you rasterheads:
>  ... 
> My question is whether this filtering is worth the trouble.  Is the
> aliasing effect described above that bad in real world scenes?  How often
> does this come up in real pictures, and how important is it?

Rob Cook's "Stochastic Sampling in Computer Graphics" from ACM Transactions
on Graphics, January 1986, is about the best reference on aliasing artifacts
in point sampling systems.  It discusses using a Monte Carlo method of
randomizing your samples to substitute aliasing artifacts for noise which is
less objectionable to the eye.  It also discusses the pros and cons of
analytic methods (filtering) versus discrete (sampling) methods.  It should
have the information you need.

Greg Galloway
Georgia Institute of Technology
gg10@prism.gatech.edu