Signal processing device and method for controlling the same
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United States of America Patent
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Aug 20, 2019
Grant Date -
Jan 18, 2018
app pub date -
Jun 29, 2017
filing date -
Jul 15, 2016
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Abstract
At least one focus detection signal processing unit calculates a first correlation amount obtained by comparing a pair of image signals with each other in a same direction on a time axis and a second correlation amount obtained by comparing the pair of image signals with each other in opposite directions on the time axis, the pair of image signals being output from an image sensor and respectively corresponding to a pair of light beams that have each passed through a corresponding one of areas, in an exit pupil of an imaging optical system, that are at least partially different from each other. A camera control unit determines whether an image shift amount corresponding to the first correlation amount corresponds to an in-focus position, based on the first correlation amount and the second correlation amount.
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