Camera tamper detection

G - Physics – 06 – F

Patent

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G06F 9/00 (2006.01)

Patent

CA 2564035

A security system (20) includes at least one camera (22) that provides a reference image regarding an area within a field of vision (24) of the camera (22). A controller (30) determines whether a difference between at least a portion of a test image obtained by the camera (22) and a corresponding portion of the reference image indicates tampering with the camera. Disclosed examples detect a variety of tampering conditions and provide an indication of camera tampering so that corrective or preventative measures may be taken.

L'invention concerne un système de sécurité (20) comprenant au moins une caméra (22) permettant d'obtenir une image de référence concernant une zone située à l'intérieur d'un champ de vision (24) de la caméra (22). Un dispositif de commande (30) détermine si une différence entre au moins une partie d'une image test obtenue par la caméra (22) et une partie correspondante de l'image de référence indique que des tentatives frauduleuses sont effectuées sur la caméra. Des exemples de l'invention permettent de détecter une variété de conditions de tentatives frauduleuses et d'obtenir une indication concernant les tentatives frauduleuses effectuées sur la caméra, de sorte que des mesures correctives ou préventives peuvent être mises en place.

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