Patent ID: 9578232
Date: 2017-02-21
CPC Classifications: H04N

Claim:
1. An image capturing apparatus comprising: an image sensor configured to photoelectrically convert a subject image formed by an imaging optical system; a focus adjusting unit configured to adjust a focus state of the subject image on the image sensor; an acquisition unit configured to acquire luminance signals of colors from signals obtained from a plurality of unit focus detection areas forming a focus detection area of the image sensor; a normalization unit configured to normalize the acquired luminance signals of the colors of the unit focus detection areas using the signals obtained from the unit focus detection areas; a calculation unit configured to calculate normalized focus evaluation values of the colors that indicate a focus state of the subject image using the normalized luminance signals of the colors; and a determination unit configured to determine a driving direction of the focus adjusting unit based on magnitude relations of a first normalized focus evaluation value that corresponds to a first color and a second normalized focus evaluation value that corresponds to a second color.