http://www.wkk.or.at/it/rfid/video_05.htm
check the video.
the same thing is already existing in cars.
there are sensors at both sides of a car and in the back
and they are sending pictures of the situation to
the mirror.
of course, this is no good solution because the driver cat focus on the mirror
because he has to watch the traffig in front of him.
but at least there are techniques.
they work with RFID chips.
this rfid thing is also already used in big markets. they register every product so they now
where they are and how many are left etc which makes it way more easy to control.
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