Self-adjusting video camera

Details Self-adjusting video camera Self-adjusting video camera

1982-11-03

1985-06-25

Rubinson, Gene Z.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358209, 358280, 358174, H04N 140

Patent

active

045257418

ABSTRACT:
Disclosed is an automatic self-adjusting CCD activated video camera circuit for adjusting the various CCD channel offset and gain values to the desired levels by utilizing the channels' digitized internal black and white references. Two identical feedback loops are used for offset and gain adjustment, respectively. In the gain/offset adjust loop, the white/black reference is compared to a desired gain/offset set by jumpers or switches on the video camera board. A difference in these values causes a corresponding 10 bit counter to increase or decrease its value. The digital counter value is converted to an analog signal and is used to optimally modify the channel gain/offset.

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patent: 4388526 (1983-06-01), Schroeder
patent: 4392123 (1983-07-01), Bruggemann
patent: 4402016 (1983-08-01), Muller

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