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From: 23r@sage.cc.purdue.edu (John Dormer)
Newsgroups: sci.virtual-worlds
Subject: Re: rambling on motion
Message-ID: <11012@milton.u.washington.edu>
Date: 11 Nov 90 22:47:23 GMT
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  I remember seeing a story about detecting eye problems in infants that
used the same technique of a coaxial lighting arrangement. The camera was
focused manually on the retina, which was quite well lit.
  More on the subject, materials for the reflectors can be had at a local
bike shop. I seem to remember a local one having reflectorized sticky tape,
white, which could be trimmed to make a small target.
  The problem of hiding a reflector spot could be solved by making a glove
with stripes of this material on it.
  How many views are there in a 3-view drawing? Three. Think about it...only
3 cameras needed to locate any point fairly well. Four would make it complete
and not very awkward, but for most things three should do ok.

        John Dormer
        dormer@medusa.cs.purdue.edu