>What does it mean exactly? They only need one short video and one short wifi capture to get 84% success rate? Key aspects upon this are that it works by match

>What does it mean exactly? They only need one short video and one short wifi capture to get 84% success rate? Key aspects upon this are that it works by matching up their style of walking (gate), so the person needs to be moving not only in the wifi data capture, but also the video they are matching with. They use the video to extrapolate a 3D mesh model of that person walking. Then model a wifi signal upon that model and produce a signature for that person that they can then use to match up with what the wifi signal is picking up. Whilst measuring some bodies way of walking has been done many times before, this add's another way of doing that - but without the need for a camera feed. So with this approach - no they can't produce a video image of the scene behind the wall from the wifi signal(s). Remember - individuals have many unique traits, many of which we havn't tapped into yet, though as far as walking styles go - that has been done for years, this just creates another way of measuring those and matching up with other forms of data, video in this case. Other things that could be explioted this way would be for example sound - a contact mic array would allow you to (thru a wall) measure a person's heartbeat to some degree and match that up to an individual. Privacy wise, this may well traction well compared to other forms of surveillance.