Camera auto focus system with detector circuits for generating e

Details Camera auto focus system with detector circuits for generating e Camera auto focus system with detector circuits for generating e

1994-08-31

1996-07-23

Garber, Wendy

Television

Camera, system and detail

Optics

348354, H04N 5232

Patent

active

055394620

ABSTRACT:
A method and apparatus for automatically focusing cameras. An auto focus circuit detects highly bright objects contained within an image frame of a scene. If highly bright objects are not detected, an auto focus processor adjusts the focus of the camera to maximize high spatial frequency components of the image frame. The auto focus processor focuses on the highly bright objects by minimizing a count function that indicates the number of pixels having greater magnitude than a threshold reference.

REFERENCES:
patent: 4780766 (1988-10-01), Nutting
patent: 5093716 (1992-03-01), Kondo et al.
patent: 5200828 (1993-04-01), Jang et al.
patent: 5235428 (1993-08-01), Hirota et al.

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