> How about thermal imaging? Unless the wearer dies(!) they will
register
> warm while the coat on its own won't. Heat sources like radiators
could
> be learnt.
Check out the O2 memory project:
http://news.bbc.co.uk/1/hi/technology/7355777.stm
The video explains how they use thermal imaging to detect how close people
are to the screens, so they can travel back/forward in time. The TI sensors
are about 30 secs into video.
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