Automatic focus detecting device

Details Automatic focus detecting device Automatic focus detecting device

1996-09-26

2000-09-26

Ho, Tuan

Television

Camera, system and detail

Optics

348350, H04N 5232

Patent

active

061248908

ABSTRACT:
An automatic focus detecting device for obtaining focusing information on the basis of an image signal obtained by forming an image on an image sensor is provided with a detection area discriminating circuit arranged to discriminate whether an area from which the image signal is obtained is a focusing information detection area which is suited for detecting the focusing information, on the basis of a state of the image signal, and a detection area setting circuit arranged to set the focusing information detection area on the basis of a result of the discrimination made by the detection area discriminating circuit.

REFERENCES:
patent: 4317135 (1982-02-01), Pitruzzello
patent: 4668991 (1987-05-01), Theuwiseen et al.
patent: 4739401 (1988-04-01), Sacks et al.
patent: 4782396 (1988-11-01), Park
patent: 5150217 (1992-09-01), Senuma et al.
patent: 5204749 (1993-04-01), Toyama et al.
patent: 5337084 (1994-08-01), Nakamura
patent: 5485209 (1996-01-01), Muramoto et al.

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