System for detecting a motion in the monitoring area of two or m

Details System for detecting a motion in the monitoring area of two or m System for detecting a motion in the monitoring area of two or m

1977-03-31

1978-09-05

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358108, 358146, 358181, H04N 522, H04N 718

Patent

active

041124634

ABSTRACT:
A plural-camera television monitoring system in which scenes or objects to be monitored are scanned by a plurality of television cameras that are not synchronized with each other, in which time-division multiplexed image signals are derived from the video signals transmitted by the cameras for comparison with corresponding image signals that are stored at an earlier time to detect changes or motion in the scanned scenes, and in which a control signal is derived from time-division multiplexed synchronizing signals originating from the cameras and characterizes the end or beginning of either an odd or even field to initiate a sequence of operation involving the comparison of the time-division multiplexed image signals with their corresponding stored image signals.

REFERENCES:
patent: 3580998 (1971-05-01), Hammond
patent: 3590151 (1971-06-01), Keith
patent: 3686434 (1972-08-01), Lemelson
patent: 3740466 (1973-06-01), Marshall
patent: 3743768 (1973-07-01), Copland

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