Method of surveillance for security in public transport

摘要

A method of surveillance for security in public transport locations is proposed by means of a network of on-board and wayside located cameras (C1 C2,...; C1', C2', ...), each of said cameras having communication means to video recording means within a control unit (SOB, SWS) whereby - at least a first camera (C4) detects a scenario comprising a person (P_X) depositing a package (X) in a located zone, - said first camera triggers a first surveillance mode of the recording means for acquiring a first image data set of said person and of said package, - said first camera triggers a second surveillance mode of the recording means for a permanent video surveillance of said package in order to estimate its location, - said first camera emits a request to the control unit (SOB) to command said first camera and other neighbours' cameras for a periodical tracing of said person in order to estimate his location, - a distance between locations of said traced person and package is estimated within the control unit, - an alert is emitted from control unit if at least one of following conditions are confirmed : - a) if one of both locations of person and package is at the wayside as the other location is on-board, b) if a displacement of said package relative to the person is detected over the second survey mode and if the estimated distance is physically greater than a predefined value.