3D-scanning accurately indicate a terrorist in a crowd

December 10, 2008, 6:23 am

   The issue of security of a peaceful society is now more than ever desperately - periodically in most countries around the world are carried out terrorist attacks with numerous casualties. From this scourge is not insured, even residents of Britain who are virtually under constant surveillance by multiple cameras installed in public places - tracking system has already helped to reveal the crimes and prevent them yet very problematic.
The most important thing is that, despite existing in the hands of the police and other authorities responsible for the safety of residents, photographs of criminals and terrorists, to allocate a specific person in the general stream of people now virtually impossible. Computer systems can not cope with the task of recognizing people, often caught in the camera lens under the inconvenient angle, but the task manually is impossible because of the enormous amount of information, but also continuously updated to be processed. However, solutions to the problem of constantly searched, and most importantly, success.
At syschikam assistance should reach the technology of three-dimensional laser scanning those made by staff of the University of Arizona (Arizona State University), Dirk Cobra (Dirk Colbry), and his colleagues at the State University of Michigan (Michigan State University). The essence of technology is as follows. Through a survey carried out by cells of human persons from different angles and with the help of a laser scanning compiled three-dimensional model, which then as a texture superimposed photographs.
The resulting three-dimensional map of a person can be used to distinguish a particular individual is not only independent of illumination, but also from the angle of shooting. According to information published by the researchers, their method can substantially improve the accuracy of recognition of people - the error system allows only one per cent of that for the development of modern methods of people - a very good result.
However, the technology is not without shortcomings, among which is worth noting the duration of the process of scanning - the procedure takes from three to five seconds, that makes the system ineffective if the search of specific individuals in a dense flow. Another disadvantage is the high cost of hardware, waddle over the mark of $ 50 thousand Sami scientists note that for the mass distribution of their brainchild is a necessary condition for reducing the cost of the finished system up to $ 5 thousand, that is, ten times. However, in their favor the fact that competing technologies can not boast low cost.
And if today a three-dimensional scanning is unlikely to find application in airports, railway stations and other crowded places, that is, in several cases of possible new items. These establishments when carried out searches of citizens (of various control points), and they are forced to the relatively long stay in one place, allowing a laser system to obtain sufficient information about the relief person. In other words, this system is viable and certainly will demand security services. The main thing is that such technology was used only to improve the safety of society and not for unauthorized surveillance of citizens.


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