Mobile phones are combined into a network of surveillance cameras
On the streets of cities in developed countries, the number of surveillance cameras is already approaching the number of residents . But this is not enough if we want to have access to events anywhere in the human presence at any time. Here we need a way to a new level. One of the steps towards a technological breakthrough is the development of Swiss researchers from the Institute for Pervasive Computing.
They created the Facet program, which integrates mobiles into a “smart” network of surveillance cameras. The Java client installed on each device communicates with the surrounding “friends” via Bluetooth and tries to analyze what is happening around. For example, the researchers conducted the following experiment: they installed four Nokia 6630 mobile phones in different parts of the corridor in their building. The program was set up so that when it moves in the frame, the device sends a signal to other phones via Bluetooth. Those transmit a signal further down the chain. One of the devices takes responsibility and communicates with the GPRS center, reporting all the information about the “invasion”.
Perimeter security is created in minutes. However, the prospect of this technology (the integration of mobile phones into a network of surveillance cameras) is not limited to primitive security systems. In the future, it is possible to create a global surveillance camera system to which any mobile phone can potentially connect.
Using Facet, nearby mobiles are able to automatically estimate the approximate distance between each other by dividing the average walking speed of a person by the time between his disappearance from one frame and the appearance in the other. During the experiments, the accuracy of the estimate was 95% (an error of 20 cm from 4 m). Knowing the distance between points in the network allows you to perform much more complex tasks with the help of the program in the future, say the creators of Facet.
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The Swiss are going to release Facet with open source, so everyone can experiment with the program, perfecting it. The client runs on J2ME on almost any modern device.
via New Scientist
They created the Facet program, which integrates mobiles into a “smart” network of surveillance cameras. The Java client installed on each device communicates with the surrounding “friends” via Bluetooth and tries to analyze what is happening around. For example, the researchers conducted the following experiment: they installed four Nokia 6630 mobile phones in different parts of the corridor in their building. The program was set up so that when it moves in the frame, the device sends a signal to other phones via Bluetooth. Those transmit a signal further down the chain. One of the devices takes responsibility and communicates with the GPRS center, reporting all the information about the “invasion”.
Perimeter security is created in minutes. However, the prospect of this technology (the integration of mobile phones into a network of surveillance cameras) is not limited to primitive security systems. In the future, it is possible to create a global surveillance camera system to which any mobile phone can potentially connect.
Using Facet, nearby mobiles are able to automatically estimate the approximate distance between each other by dividing the average walking speed of a person by the time between his disappearance from one frame and the appearance in the other. During the experiments, the accuracy of the estimate was 95% (an error of 20 cm from 4 m). Knowing the distance between points in the network allows you to perform much more complex tasks with the help of the program in the future, say the creators of Facet.
')
The Swiss are going to release Facet with open source, so everyone can experiment with the program, perfecting it. The client runs on J2ME on almost any modern device.
via New Scientist
Source: https://habr.com/ru/post/15666/
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