Monitoring system using infrared image processing

Details Monitoring system using infrared image processing Monitoring system using infrared image processing

1988-11-28

1991-03-12

Orsino, Joseph A.

Communications: electrical

Condition responsive indicating system

Specific condition

340600, 340567, 358105, 358113, G08B 1700

Patent

active

049996142

ABSTRACT:
Temperature data of each picture element output from a infrared camera looking at a scene to be watched is compared with the same data of a previous frame. Temperature data which has changed from the previous frame is input to a histogram operator having a region defined by the temperature change and quantity of the picture elements. When the quantity of picture elements in the defined region exceeds a threshold level, it is recognized that a certain object having considerable temperature change and size has been detected. Thus, a signal is output to trigger an alarm system, or to sustain circulating frame memories which have recorded the previous scenes so that the scenes of visible light as well as the temperatue patterns for frames before, on, and after the trigger signal can be reproduced as visual images of a display screen.

REFERENCES:
patent: 3924130 (1975-12-01), Cohen et al.
patent: 4408224 (1983-10-01), Yoshida
patent: 4608599 (1986-08-01), Kaneko et al.
patent: 4779095 (1988-10-01), Guerreri
patent: 4807027 (1989-02-01), Muto
patent: 4823290 (1989-04-01), Fasack et al.

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