Automatic focusing device

Details Automatic focusing device Automatic focusing device

1996-11-21

1998-07-28

Metjahic, Safet

Photography

With exposure objective focusing means, focusing aid, or...

Having pursuit mode

G03B 1334, G03B 1516

Patent

active

057873143

ABSTRACT:
An automatic focusing device includes a focus detection device for detecting focus data from a plurality of focus detection areas established in the imaging region. A selection device selects a specified area from the plurality of focus detection areas. A focus control device performs focus control of the photographic lens corresponding to the focus data of that specified area. The selection device may include a statistical prediction device for performing a statistical calculation on the past focus data in the specified area and for determining a predicted value of the focus data by extending a trend of the focus data. A statistical determination device determines whether the most recent focus data of the specified area is outside the acceptable range of the predicted value. A statistical tracking device searches for focus data within the acceptable range of the said prediction value and changes the specified area to the searched-out area.

REFERENCES:
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patent: 5434638 (1995-07-01), Ishibashi et al.
patent: 5457513 (1995-10-01), Uenaka
patent: 5517274 (1996-05-01), Hamada et al.
patent: 5585883 (1996-12-01), Yamano
patent: 5587762 (1996-12-01), Watanabe
patent: 5612761 (1997-03-01), Nakata

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