A
practical security system has to be small which means that the millimetre
wave images have relatively low resolution. However, this has advantages:
the millimetre wave pictures do not reveal the body in any private
detail.
This millimetre wave camera uses a nodding mirror to build up an
image from a line of detectors. With fewer pixels to collect, millimetre
wave moving images can be recorded in real time and the system operates
at walk-through speeds to minimise passenger inconvenience at airports
etc.
Thus one way to deal with privacy concerns is to use a computer rather
than a person to analyse the images, and give an alarm if a suspicious
object is being carried
Here you can see how the threat object shows up as a dark region
on the torso, blocking the body heat. the computer recognises this
(blue man) and places an alarm box on top of the video image the alarm can be raised without a human operator ‘looking
through’ clothing
Brijot Imaging Systems
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