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A novel combination of surveillance and Internet technologies designed to track individuals in public environments and communicate with them using narrowly focused sound beams was demonstrated in the Emerging Technologies exhibition at SIGGRAPH 2003. Developed by New York-based media artist Marie Sester, the Access system is built around a Web site that displays real-time video of a public space. Using the site as the control center, a user can select any person in view of the video camera, and a computer-vision device will automatically move a robotic spotlight to follow the individual's ...