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From: kevin@calvin.EE.CORNELL.EDU (Kevin Tubbs)
Newsgroups: comp.graphics,rec.arts.tv
Subject: Re: How to view Superbowl 3-D
Message-ID: <926@calvin.EE.CORNELL.EDU>
Date: 30 Jan 89 16:22:49 GMT
References: <3230@datapg.MN.ORG> <3047@pixar.UUCP> <41153818.16321@apollo.COM> <3069@pixar.UUCP> <249@ai.etl.army.mil>
Reply-To: kevin@calvin.ee.cornell.edu.UUCP (Kevin Tubbs)
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Organization: Cornell Space Plasma Physics Group
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In article <249@ai.etl.army.mil> mike@ai.etl.army.mil (Mike McDonnell) writes:
<
<The effect used to do the 3D for the Superbowl is called the "Purkinje
<phenomenon" and has been known for a long, long time.  [...]
<As the light level goes
<down, the integration time of the eye goes up and a moving image will
<therefore be perceived as lagging its true optical location on the
<retina by an amount that depends on the overall light level.  This is a
<neural effect, not an optical effect.

A good example of this is waving a flashlight in a dark room.  The lighted
end seems "disconnected" from the handle.
-- 
Kevin Tubbs, 5152 Upson, Cornell University, Ithaca NY, 14853  (607) 255-8703
kevin@calvin.ee.cornell.edu  {uunet,rochester}!cornell!calvin!kevin