Television – Camera – system and detail – Optics
Patent
1992-08-27
1995-05-16
Razavi, Michael T.
Television
Camera, system and detail
Optics
H04N 5232
Patent
active
054165180
ABSTRACT:
A method an 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: 5115262 (1992-05-01), Komiya
Kawaguchi Naoki
Komuro Teruyoshi
Lee Chuen-Chien
Torii Reiko
Ho Tuan V.
Razavi Michael T.
Sony Electronics Inc.
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