Pyroelectric camera signal processing having pedestal signal lev

Details Pyroelectric camera signal processing having pedestal signal lev Pyroelectric camera signal processing having pedestal signal lev

1985-12-24

1987-09-15

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358163, 250333, H04N 533

Patent

active

046943340

ABSTRACT:
A system and method are disclosed for pyroelectric camera signal processing, which processing includes compensating for the effects of pedestal level variations. The pyroelectric videcon tube generates an electrical output signal component indicative of target signal information based upon the sensed thermal energy emitted from the target, and also generates a pedestal component around which the target signal information is centered. A line-by-line DC restorer is provided to re-establish the DC level of the video signal, with the DC level of the restorer being automatically controlled to thereby compensate for variations in pedestal levels due to drift, tube aging, and/or generated by shutter to scene temperature differences.

REFERENCES:
patent: 4481535 (1984-11-01), Hodd

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