Apparatus and method for deciding in-focus position of...

Registers – Coded record sensors – Particular sensor structure

Reexamination Certificate

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C235S462010

Reexamination Certificate

active

07614559

ABSTRACT:
An imaging lens is positioned at an initial position, the image of a subject is sensed and an overall focus evaluation value representing the degree of focus of the image of the subject is obtained. Face detection processing is only executed if the overall focus evaluation value obtained is equal to or greater than a threshold value. The imaging lens is then moved to the next position and the process repeated. A range in which face images are detected at positions of the imaging lens where the overall focus evaluation value is equal to or greater than the threshold value is decided upon as a focusing range. A graph of face-area focus evaluation values representing degree of focus of the image portion of the face is obtained and the position at which this graph is maximum is decided upon as the in-focus position of the imaging lens.

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patent: 11-146405 (1999-05-01), None

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