Using wireless signals like Wi-Fi to make people beyond the wall detectable

A research team at the Massachusetts Institute of Technology (MIT) has developed a system that can detect the figure and movement of people behind the wall using radio signals.

RF-Capture: Capturing the Human Figure Through a Wall
http://rfcapture.csail.mit.edu/

You can see how the system called "RF-Capture" works by seeing the following movie.

Capturing a Human Figure Through a Wall using RF Signals - YouTube


Located on the shelf on the left is a terminal developed by MIT, a person in the room next to the wall behind the wall.


Closing the door will make me not sure if there are people ......


Terminals thus recognized the appearance of a person.


The state of the other side of the wall is checked by the return condition of the skipped radio and it is detecting the figure of a person. It is similar to a radar that skips microwaves, but the output of this terminal is one ten thousandth of that of a mobile phone.


Of course, even if a person is moving beyond the wall it is detectable.


In that case, by superimposing and processing the data of the state of movement, it creates an image like the image on the right side.


When the person standing behind the wall changes, the visible image also changes like this.


Somehow, I understand what kind of pose they are doing.


The figure below compares the tracking performance with Kinect. The tracking result is on the right side, the blue line is the terminal of MIT, the red line is due to Kinect. The error is slight.


The detection accuracy seems to be that it seems that the chest expands outdoors when a person in the room breathes, so it can not be used for child watching sensors, home or absence confirmation at the time of a fire It is expected. The research content will be held in Kobe from Monday, November 2nd, to Thursday, November 5thSIGGRAPH Asia 2015It will be announced at.