Device for automatic focusing control for video camera system

Details Device for automatic focusing control for video camera system Device for automatic focusing control for video camera system

1991-03-06

1992-06-30

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358225, 354402, H04N 5232

Patent

active

051268493

ABSTRACT:
A video camera system has a movable focusing lens which is automatically focused to form a sharp subject image on a CCD. The CCD generates a video signal based on light transmitted from a subject through the movable focusing lens. Maximum contrast data are produced from each horizontal scanning line in an image frame in a field on the CCD, and are then integrated by an integrator. The movable focusing lens is controlled in order to maximize the integrated contrast data.

REFERENCES:
patent: 4383274 (1983-05-01), Inuiya
patent: 4500925 (1985-02-01), Hanma
patent: 4862404 (1989-08-01), Schwartz
patent: 4974092 (1990-11-01), Kawamura
patent: 5005086 (1991-04-01), Iwamoto

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