Camera Tamper Detection
1 Assignment
0 Petitions
Accused Products
Abstract
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.
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Citations
42 Claims
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1-20. -20. (canceled)
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21. A method of operating a security system having at least one camera, comprising:
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determining whether a difference between at least a portion of a test image from the camera and a corresponding portion of a reference image from the camera is associated with some movement within a field of vision of the camera; and
determining whether the difference between the portion of the test image and the reference image indicates tampering with the camera. - View Dependent Claims (22, 23, 24, 25, 26)
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27. A method of operating a security system having at least one camera, comprising
obtaining a plurality of reference images from the camera corresponding to a plurality of different conditions; -
determining which of the conditions exists when obtaining a test image from the camera;
selecting one of the reference images corresponding to the condition existing when obtaining the test image; and
determining whether a difference between at least a portion of the test image and a corresponding portion of the selected reference image indicates tampering with the camera. - View Dependent Claims (28, 29, 30, 31)
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32. A security system, comprising:
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at least one camera that provides an image; and
a controller that determines whether a difference between at least a portion of a test image from the camera and a corresponding portion of a reference image from the camera is associated with some movement within a field of vision of the camera and determines whether the difference between the portion of the test image and the reference image indicates tampering with the camera. - View Dependent Claims (33, 34, 35, 36, 37)
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38. A security system, comprising:
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at least one camera that provides an image;
a controller that determines whether a difference between at least a portion of a test image from the camera and a corresponding portion of a reference image from the camera indicates tampering with the camera; and
a memory containing a plurality of reference images associated with a plurality of different conditions and wherein the controller selects an appropriate one of the plurality of reference images corresponding to a condition associated with the test image. - View Dependent Claims (39, 40, 41, 42)
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Specification