Method and apparatus for auto-focusing in image sensor

Television – Camera – system and detail – Optics

Reexamination Certificate

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C348S222100, C396S125000

Reexamination Certificate

active

07969501

ABSTRACT:
For auto-focusing of a focusing lens within an image sensing system, an N-bin luminance histogram is generated by a digital signal processor from an image. A microprocessor determines a type of the image from the N-bin luminance histogram. The microprocessor also determines a focus position using a first set of at least one focus value if the image is determined to be of a first type. The microprocessor also determines the focus position using a second set of at least one focus value different from the first set if the image is determined to be of a second type.

REFERENCES:
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patent: 7620265 (2009-11-01), Wolff et al.
patent: 2002/0197071 (2002-12-01), Hofer
Korean Patent Application No. 1020040059496 to Jung et al., having Publication date of Feb. 3, 2006 (w/ English Abstract page).
Japanese Patent Application No. 04-309357 to Narimasa, having Publication date of May 20, 1994 (w/ English Abstract page).
Japanese Patent Application No. 2002-349870 to Manabu et al., having Publication date of Jul. 2, 2004 (w/ English Abstract page).

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