[Lens].

Abstract

(57) ABSTRACT (73) Assignee: FUJITSU SEMCONDUCTOR LIMITED, Yokohama (JP) A circuit for auto-focus adjustment includes a calculating unit configured to calculate an indicator of randomness of pixel values in a captured image, a direction determining unit con (21) Appl. No.: 12/938,994 figured to compare a first value of the indicator calculated by the calculating unit in a preceding focus adjustment process with a second value of the indicator calculated by the calcu (22) Filed: Nov. 3, 2010 lating unit after the calculation of the first value, thereby to determine a direction of focus shift in response to a result of the comparison, and a control unit configured to start a focus (30) Foreign Application Priority Data adjustment process by which a focus position is first moved in the direction of focus shift determined by the direction deter Nov. 26, 2009 (JP) ................................. 2009-268936 mining unit.