IMAGE CAPTURING APPARATUS AND CONTROL METHOD THEREFOR

摘要

An image capturing apparatus comprises an image sensor including a photoelectric conversion portion configured to receive light beams having passed through a portion of a pupil area of an imaging lens and output an image signal, a control unit configured to output, from the photoelectric conversion portion, a plurality of image signals captured by shifting a focus position of the imaging lens, an acquisition unit configured to acquire an image shift amount on an image sensing plane of the image sensor, which corresponds to a shift amount when shifting the focus position of the imaging lens; and a calculation unit configured to calculate a correction coefficient for shading on the image sensing plane based on the image shift amount by comparing signals corresponding to the same object among the plurality of image signals.

主权项

1. An image capturing apparatus comprising:
an image sensor including a photoelectric conversion portion configured to receive light beams having passed through a portion of a pupil area of an imaging lens and output an image signal; a control unit configured to output, from said photoelectric conversion portion, a plurality of image signals captured by shifting a focus position of the imaging lens; an acquisition unit configured to acquire an image shift amount on an image sensing plane of said image sensor, which corresponds to a shift amount when shifting the focus position of the imaging lens; and a calculation unit configured to calculate a correction coefficient for shading on the image sensing plane based on the image shift amount by comparing signals corresponding to the same object among the plurality of image signals.