Iphone takes an Infrared picture of face and surroundings every 5-10 seconds. Routers can be cameras and see through walls
a different version and provider Scientists turn WiFi routers into ‘cameras’ that can see people through walls Researchers at Carnegie Mellon University have repurposed a common piece of tech present in virtually every household to function as a tracking technology. By utilizing WiFi routers, they have developed a method for detecting the three-dimensional shape and …