Black level correction circuit for video camera

Details Black level correction circuit for video camera Black level correction circuit for video camera

1987-03-25

1988-11-22

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

35821316, 358221, H04N 516

Patent

active

047869690

ABSTRACT:
A circuit for cancelling the effects of dark current in a video camera by making a correction such that there is no variation in the black level values produced when the gain of a video amplifier for amplifying an image pick-up output is switched between high and low levels in the dark condition. Provision is made to provide correction when the camera is in the stabilized state and also to detect whether a corrected black level value falls within a clip level, typically found in the video amplifier system, in order to obtain proper black level correction.

REFERENCES:
patent: 4274107 (1981-06-01), Tamura
patent: 4556912 (1985-12-01), Yamanaka
patent: 4631589 (1986-12-01), Hongu

Affiliated with

Also associated with

Rating

Black level correction circuit for video camera does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Black level correction circuit for video camera, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Black level correction circuit for video camera will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-438624