Video camera with flicker cancellation

Details Video camera with flicker cancellation Video camera with flicker cancellation

1991-12-09

1993-12-21

Razavi, Michael T.

Facsimile and static presentation processing

Facsimile

Recording apparatus

35821318, 358174, H04N 5238, H04N 552

Patent

active

052725391

ABSTRACT:
An exposure correcting loop detects an image pickup signal level and controls a gain of an AGC amplifier and/or an opening of an iris in accordance with the image pickup signal level. A flicker cancelling loop has a flicker detector and detects a flicker component level in the image pickup signal and controls the gain of the AGC amplifier and/or the opening of the iris so that the flicker component level is cancelled. The exposure correcting loop and flicker detector are independent systems.

REFERENCES:
patent: 4495520 (1985-01-01), Kravitz et al.
patent: 4631582 (1986-12-01), Nagasaki et al.
patent: 4670787 (1987-06-01), Levine
patent: 4918538 (1990-04-01), Saito et al.
patent: 4989093 (1991-01-01), Kaneko
patent: 5053871 (1991-10-01), Ogawa et al.
patent: 5053877 (1991-10-01), Kondo et al.
patent: 5065248 (1991-11-01), Homma
patent: 5128769 (1992-07-01), Arai et al.
patent: 5162913 (1992-11-01), Chatenever et al.

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