SURVEILLANCE SYSTEM AND METHOD FOR DETECTING BEHAVIOR OF GROUPS OF ACTORS

摘要

Electronic surveillance comprises detecting positions and motion of a plurality of detected actors in an area under surveillance. A set of rules of behavior is provided that each define at least a predicted aspect of motion of a modeled actor. At least part of the rules of behavior is specified dependent on position and/or motion of the modeled actor relative to a further actor. For each of the rules of behavior whether said aspect of motion and the position and/motion of a first one of the detected actors relative to a second one of the detected actors, when used as the position and/motion of the modeled actor satisfy the rule of behavior. As a result of detection actors that have been detected to participate in a rule may be marked on a display screen that shows an image of the area under surveillance, measures such as opening of doors may be controlled in the area or an alert may be generated if a rule is found to be satisfied.