Image analysis – Pattern recognition – Feature extraction
Patent
1996-12-23
1999-08-10
Moore, David K.
Image analysis
Pattern recognition
Feature extraction
348154, 348155, 340555, G06K 946, H04N 718, G08B 1318
Patent
active
059370920
ABSTRACT:
This invention is a video security system (10) and a method for visually monitoring a scene and detecting motion of an intruder within the scene. A camera (C) continually views the scene and produces a representative signal. A processor (12) processes the signal and produces an image (f2) represented by the signal. This image is compared with a similar image (f1) of the scene from a previous point in time. Segments of the later image which differ from segments of the earlier image are identified. A discriminator (14) evaluates these segments to determine if the differences result simply from lighting changes, or the movement of an intruder within the scene as indicated by surface differences between segments of the respective differences. If caused by an intruder, an appropriate indication is provided. An algorithm is employed by which differences from one image to another caused by global or local lighting changes effects are identified so as not to produce false alarms.
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Hobson Gregory L.
Waldman Gary S.
Wootton John R.
Chen Wenpeng
Esco Electronics
Moore David K.
LandOfFree
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