Suppression of field-rate brightness variations for a television

Details Suppression of field-rate brightness variations for a television Suppression of field-rate brightness variations for a television

1985-07-31

1987-06-02

Rubinson, Gene Z.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358174, H04N 558, H04N 552

Patent

active

046707875

ABSTRACT:
A television camera includes optics for directing light from an illuminated scene to an imager, a signal processor for developing a video signal from an imager supplied signal, and apparatus for controlling the magnitude of the developed video signal to reduce brightness variations (flicker) caused by artificial scene illumination. The controlling apparatus develops a first signal representative of the average illumination of the scene, a second signal representative of the amount of the directed light which the imager actually responds to, and a control signal in response to the signal processor for controlling the magnitude of the developed video signal.

REFERENCES:
patent: 3010362 (1961-11-01), Smith
patent: 3586773 (1971-06-01), Niemyer, Jr. et al.
patent: 4187519 (1980-02-01), Vitols et al.
patent: 4302780 (1981-11-01), Yamazaki et al.
patent: 4516172 (1985-05-01), Miyata et al.

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