The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 15, 2009
Filed:
Mar. 13, 2006
Kunio Yata, Saitama, JP;
Kunio Yata, Saitama, JP;
Fujinon Corporation, Saitama-shi, Saitama, JP;
Abstract
An autofocus system includes: an imaging device which captures a subject image; a matching image detection device which detects an image that most matches a stored reference pattern image of a target subject to focus on; a determining device that determines that an image of the target subject was detected when a correlation value indicating a degree of matching of the detected image with respect to the reference pattern image is equal to or greater than a predetermined threshold value and determines that an image of the target subject was not detected when the correlation value is less than the threshold value; a changing device which changes the threshold value; and an autofocus device which, only when an image of the target subject was detected, takes a position of the detected image as a position of the target subject to focus on and performs focus adjustment.