Passive thermal image glass breakage detector

Details Passive thermal image glass breakage detector Passive thermal image glass breakage detector

2009-11-12

2011-11-01

Caputo, Lisa (Department: 2855)

Thermal measuring and testing

Leak or flaw detection

C374S121000, C374S045000

Reexamination Certificate

active

08047707

ABSTRACT:
A system and method for detecting glass breakage using thermal imaging is provided. The system includes an infrared image detector for acquiring an infrared image of a monitored area, and a signal processor for processing the acquired images to determine removal of a glass door or window based on a comparison of the thermal signature of the acquired image against the thermal signature of a reference image. Specifically, signal processor subtracts the reference image data from the acquired image data, which results in a substantially uniform image when the acquired image matches the reference image. On the other hand, the image resulting from the subtraction exhibits significant non-uniformity when the acquired image does not match the reference image, as would be the case if the pane of glass of a door or window were broken, removed or opened.

REFERENCES:
patent: 7422365 (2008-09-01), Chamberlain et al.
patent: 2004/0076216 (2004-04-01), Chamberlain et al.
patent: 2005/0207468 (2005-09-01), McCullough et al.

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