Forward locking infrared video processing system having a scene

Details Forward locking infrared video processing system having a scene Forward locking infrared video processing system having a scene

1977-01-28

1978-05-23

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358166, 358113, H04N 514

Patent

active

040914143

ABSTRACT:
A means for expanding the dynamic range of a forward looking infrared (FL video processing system by inserting an automatic low frequency gain limiting and first post amplifier circuit means at the output of the preamplifiers in each video channel to provide variable pedestal limiting of the low frequency components of the video signal. The automatic low frequency gain limiting and first post amplifier circuit means compresses the pedestal of signals derived from smoke, dust, or fire to arbitrary small levels to preserve sufficient dynamic range for enhancing the high frequency detail signal riding on the pedestals at a display.

REFERENCES:
patent: 3975586 (1976-08-01), Chow
patent: 4038688 (1977-07-01), Chow

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