By Randall Marsh -
Researchers at MIT's Computer Science and Artificial Intelligence Laboratory have developed what could become low-cost, X-ray vision. The system, known as "Wi-Vi," is based on a concept similar to radar and sonar imaging, but rather than using high-power signals, this tech uses reflected Wi-Fi signals to track the movement of people behind walls and closed doors.
When a Wi-Fi signal is transmitted at a wall, a portion of that signal penetrates through and reflects off any humans that happen to be moving around in the other room.
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