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Old 12-22-2008, 10:15 AM   #1275
alkemical
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http://www.theregister.co.uk/2008/12..._tracker_ware/

Ohio prof develops CCTV people-tracker 'ware

Boffins in Ohio have taken another step towards the global surveillance panopticon of the future, developing software which can autonomously track an individual through a city using CCTV cameras.

James W Davis, associate prof at the Ohio State computer science and engineering department, developed the new spyware with the aid of grad student Karthik Sankaranarayanan.

Davis and Sankaranarayanan's code works by using a pan-tilt-zoom camera to create a panoramic image of its entire field of view, and then linking each ground pixel in the picture to a georeferenced location on a map. This means that when the camera sees a person or vehicle, the computer also knows in terms of map coordinates where it is looking.

That in turn makes it possible for a new camera to be trained on the target as he/she/it passes out of the first one's field of view. In this way, a subject can be followed automatically anywhere that the monitoring computer has CCTV coverage. There's no need for a human operator to manually train cameras around, using up man-hours and sooner or later making a mistake and losing track.

"That's the advantage of linking all the cameras together in one system - you could follow a person's trajectory seamlessly," says Davis.
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