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:
May. 02, 2017
Filed:
Aug. 22, 2014
Canon Kabushiki Kaisha, Tokyo, JP;
Yumi Watanabe, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
In a focus detection apparatus having a plurality of filters suitable for processing of signals having different frequencies, a setting unit sets a thinning rate in a main-scanning direction of an image sensor depending on a filter to be used, a control unit controls to read image signals sequentially with the set thinning rate and store the read image signals in a storage unit, a processing unit processes the stored image signals with the filter and obtains a focus state evaluation value in a sub-scanning direction of the image sensor and a focus control unit performs the focus control processing based on the focus state evaluation value. If the filter to be used is for a second frequency that is higher than a first frequency, the setting unit sets a lower thinning rate than that for a filter for the first frequency.