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WiFi signals can now be used to count people in crowd

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The usage of Internet is getting increased and everyone is now becoming familiar with how to use it on their tiny devices as well. It has become feasible with the arrival of WiFi enabled on the cell phones. But now, along with using Internet for surfing, chatting etc., WiFi will serve some other purposes as well.

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Now, it can be utilized to count the number of people in a given space, leading to diverse applications such as energy efficiency to search-and-rescue operations.

Researchers belonging to University of California-Santa Barbar have shown that wireless signals are capable of doing more than just giving you internet access.

The professor of electrical and computer engineering, Yasmin Mostofi’ said that their approach can make a guess of the number of people walking in an area, based on only the received power measurement of a WiFi link.

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Interestingly, this approach does not need people having Wi-Fi enabled devices for them to get considered for counting. To fulfil this feat of people-counting, the researchers put two WiFi cards at contrary ends of a target area, Medical Xpress reported.

Utilizing just the received power measurement of the link between the two cards, their approaches can assess the number of people walking in the area. It has been successfully tested with up to nine people so far in both indoor and outdoor settings.

The potential to make a guess about the number of people in a given space could be utilized in smart homes and buildings, so air conditioning and heating could be adjusted in accordance with the level of occupancy.

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