You Can Run but You Can't Hide

Stanford researchers have developed a small mobile robot that not only can take your picture -- it can follow you around. Unlike conventional surveillance systems, which lose objects when they disappear from view, the new “autonomous observer” employs a laser range finder to add depth to images captured by its video camera. Using the resulting 3-D map, the robot can work out a target’s potential escape routes and maneuver to position its camera for the widest possible field of view. In laboratory tests, both human and robot targets found it difficult to escape detection. Computer Science Professor Jean-Claude Latombe says that companies might use the software to improve their closed-circuit security systems. The Pentagon thinks it might be useful for exploring buildings in urban war zones. And surgeons could zero in on key tissues despite obstructions created by people and machines.