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:
Aug. 28, 2007
Filed:
Feb. 11, 2004
Toshimi Watanabe, Yokohama, JP;
Toshimi Watanabe, Yokohama, JP;
Nikon Corporation, Tokyo, JP;
Abstract
A CPU calculates integrating values of image-capturing signals in a bandobtained by removing through a band pass filter a low frequency component of image-capturing signal output from an image-capturing device and integrating values of the image-capturing signals in a bandretaining the low frequency component intact, each calculated in correspondence to one of a plurality of lens positions. The CPU then obtains focal point evaluation values based upon these integrating values in correspondence to the individual bands. In addition, when it is judged that the image-capturing signals are saturated, the CPU calculates a new evaluation value parameterhistory record=(focal point evaluation value history record in band−focal point evaluation value history record in band). The CPU then determines a new evaluation value parameterhistory record extremal value through a 3-point interpolation operation and calculates a lens position corresponding to the extremal value.