Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!len@csd4.milw.wisc.edu
From: len@csd4.milw.wisc.edu (Leonard P Levine)
Newsgroups: comp.graphics
Subject: Re: 3-D perceptual abilities
Message-ID: <690@csd4.milw.wisc.edu>
Date: 31 Jan 89 21:15:45 GMT
References: <1104@nic.MR.NET>
Sender: news@csd4.milw.wisc.edu
Lines: 17

From article <1104@nic.MR.NET>, by jjc@sun1.MAYO.EDU (Jon Camp):
> 1) As Benie Cosell posted, 3-D perception is much more than stereopsis.  It involves parallax, focus, accomodation, obscuration, perspective, memory, a great many other functions which I am not aware of and most likely some that no one has ever measured.  In our everyday lives, stereopsis is not even the primary means of depth perception.   Stereopsis IS, however, relatively inexpensive to simulate, and is therefore the only contact most people have with  "3-D display". 


If you watch animals that do not normally have 3D perception like rabbits
and such, the move their heads up and down a bit while looking at things.

I am sure (not scientificially) that this permits the animal to view things 
in 3D.  Perhaps checking with one-eyed people will show that they also 
move their heads when looking at things.

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| Leonard P. Levine               e-mail len@evax.milw.wisc.edu |
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