FOCUS CONTROL APPARATUS, IMAGE CAPTURING APPARATUS, METHOD FOR CONTROLLING FOCUS CONTROL APPARATUS AND STORAGE MEDIUM
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United States of America Patent
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Nov 2, 2015
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Nov 14, 2014
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Abstract
There is provided a focus control apparatus. A first extraction unit extracts frequency components of a first band from a predetermined evaluation area of image data generated by an image capturing unit. A change unit changes the evaluation area based on the frequency components extracted by the first extraction unit, so that the evaluation area after the change is narrower than the evaluation area before the change. A second extraction unit extracts, from the evaluation area after the change, frequency components of a second band that includes a higher band than the first band. A calculation unit calculates a focus evaluation value for performing focus control of the image capturing unit based on the frequency components extracted by the second extraction unit.
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