Image capturing apparatus that performs shading correction and control method therefor
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United States of America Patent
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Feb 21, 2017
Grant Date -
Dec 4, 2014
app pub date -
May 30, 2014
filing date -
May 31, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
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.
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