Automatic focusing method and digital photographing...

Details Automatic focusing method and digital photographing... Automatic focusing method and digital photographing...

2004-12-08

2008-10-07

Ye, Lin (Department: 2622)

Television

Camera, system and detail

Optics

C348S345000, C348S356000, C396S102000, C396S121000, C396S122000

Reexamination Certificate

active

07432975

ABSTRACT:
Provided are an automatic focusing method in which a photograph region is brought into focus through automatic movement of a focal lens to a focal position, in response to a photographing-command signal, and a digital photographing apparatus using the method. The method includes dividing the photograph region into a plurality of sub-regions, focusing on the sub-regions and obtaining focal position values DSFOC, calculating an average focal position value ADSFOCof the focal position values DSFOC, selecting focal position values DSFOCwhose differences from the average focal position value ADSFOCare equal to or less than a threshold value DTH, and moving the focal lens to a focal position corresponding to the focal position value DSFOChaving the shortest focal distance among the selected focal position values DSFOC.

REFERENCES:
patent: 6441855 (2002-08-01), Omata et al.
patent: 7242434 (2007-07-01), Sugimoto et al.
patent: 2004/0119876 (2004-06-01), Ohmori et al.
patent: 2004/0223073 (2004-11-01), Kanai

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