发明名称 Digital camera
摘要 A digital camera includes: an image-capturing unit that receives light transmitted through a photographic optical system and outputs image signals; a lens drive unit that moves a focus lens constituting the photographic optical system along an optical axis; an evaluation value calculation unit that calculates a focal point evaluation value that changes in correspondence to a position assumed by the focus lens based upon the image signals; a focal adjustment unit that executes an AF search by repeatedly engaging the image-capturing unit and the evaluation value calculation unit in operation as the focus lens is made to move along the optical axis by the lens drive unit, detecting a focus match position based upon resulting focal point evaluation values and driving the focus lens to the focus match position; a face recognition unit that recognizes a face of a person in an image by analyzing the image signals; a distance calculation unit that determines an approximate distance to the face based upon the size of the recognized face; and a lens position determining unit that determines a focus lens position to be set as a start point of the AF search by the focal adjustment unit based upon the approximate distance to the face having been determined by the distance calculation unit.
申请公布号 US2007030381(A1) 申请公布日期 2007.02.08
申请号 US20060322222 申请日期 2006.01.03
申请人 NIKON CORPORATION 发明人 MAEDA TOSHIAKI
分类号 G03B13/00 主分类号 G03B13/00
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