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From: mgobbi@cs.ubc.ca (Mike Gobbi)
Newsgroups: sci.virtual-worlds
Subject: Re: Tracking of Targets
Message-ID: <1991Jun20.232119.3115@milton.u.washington.edu>
Date: 19 Jun 91 21:45:31 GMT
References: <1991Jun18.161206.19250@milton.u.washington.edu> <1991Jun18.
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In article <1991Jun19.193222.20056@milton.u.washington.edu> mccool@dgp.toronto.e
du (Michael McCool) writes:
>>
>This is somewhat related to the Japanese Stereo TV thread, in particular the
>tracking of objects.  Does anyone know of an inexpensive signal for 
> ...
>
>Application note: this is so people can take videotapes of themselves 
>riding a horse and then self-critique their posture.  Is this virtual
>worlds?
>
>Michael McCool@dgp.utoronto.ca

I would suggest that the target wear a small radio/sound transmitter,
and the camera have 5 directional pickups (one aimed "straight", the others
"up", "down", "left", and "right" by about 5 degrees).  The camera would be
aimed by swinging it in the direction of the stronger signal in the
vertical and horizontal planes.  If the "straight" pickup has the best
signal, the camera is held steady.

This has the problem that it must start out aimed at the target, and if
the target moves faster than the device can rotate it will lose it.  There
are probably numerous technical problems as well, since I'm not a radio
expert, but I think it might work.

--
    __     In Quest of Knowledge...
   /..\
--mm--mm--     Mike Gobbi
               (mgobbi@cs.ubc.ca)