Perimeter surveillance system

Details Perimeter surveillance system Perimeter surveillance system

1979-11-26

1981-02-03

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358105, H04N 718

Patent

active

042492076

ABSTRACT:
Disclosed is an automatic video intrusion detection system. The system monitors a given area such as between two parallel fences. The image of the given area is divided into an array of cells each approximately equal in size to the image of a man. The video for each cell is integrated, digitized and stored in an array. Changes in cell values are detected and tracked so that changes in, say, 3 adjacent cells in a given direction, indicate an intruder. A microcomputer implements a tracking algorithm. Filtering discriminates against light level changes. The system is simpler than a known one which analyzes grey values of thousands of points in a video field.

REFERENCES:
patent: 3743768 (1973-07-01), Copland
patent: 3988533 (1976-10-01), Mick
patent: 4081830 (1978-03-01), Mick
patent: 4160998 (1979-07-01), Kamin
patent: 4198653 (1980-04-01), Kamin

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