Saturday, January 28, 2023

Wi-Fi routers are not only used to browse the Internet, but a group of researchers has used them to “see” people through walls.

A group of researchers has managed to develop a method to be able find human body in a roombeing able to follow their movements three-dimensionally and using only router of Wi-Fi.

According to new research published in the preprint service arXiv, researchers at Carnegie Mellon University used “DensePose” as their main tool, a system capable of mapping all the pixels on the surface of a human body in a photo, combines it. With a neural network to “see” coordinates of people in a certain location, From the interference they generate to the Wi-Fi signal.

the process of knowing the location of people without seeing them

In his report, he detailed how work has yet to be done to develop the technology to enable “see people“Without using cameras or expensive equipment, including LiDAR, which They can be around 600 or 700 dollars. That’s where this new method comes in, which can be used with equipment starting at $30.

For this experiment, TP-Link Archer A7 AC1750 router was used, which one was placed at each end of the room With many people inside it, where it was possible to analyze the interference of the Wi-Fi signal thanks to a series of algorithms with AI, information that was interpreted with Denspose to obtain human statistics


As in the main image, you can see a comparison of people detection systems: on the left using an optical system based on DensePose and on the right leveraging the same technology with Wi-Fi

This resulted in the fact that in most cases it became possible to generate very precise structures About every person inside the room, which the researchers claimed was as good as they were”some image-based approaches,

According to the researchers, one advantage of this method compared to cameras is that estimation of human body structure Son “more respectable“With human privacy.

as well, no light required And the system is capable of detecting body poses even if there are additional objects in the way that might obscure the view if it were a traditional camera.

Error Detection

Some identification errors: (ab) in awkward posture, (cd) with more than three subjects in the same spot. The top row uses the camera to view densely posed subjects and the bottom row only sees Wi-Fi signals

Despite the fact that the system is accurate in a large number of examples shown by researchers, this method is still There are few bugs for humans to detect and its position, mainly for poses “strange or unusual“That it can, except if there are too many subjects in the room, because ideally, this method allows three or fewer people to be optimally detected.

A New Level of “Privacy,” According to Researchers

Researchers believe analysis of Wi-Fi signals could serve as a Substitute for normal RGB cameras To detect people in a room.

Furthermore, they classify this advance as an improvement in privacy rights “at a reasonable cost”, as the technology can be extended monitor the well-being of the peopleOr even identify “suspicious” behaviors within the home.

Nation World News Desk
Nation World News Deskhttps://nationworldnews.com
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