Image pickup apparatus having in-focus operation based on one focus detection area and method for controlling same
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United States of America Patent
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May 30, 2017
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N/A
app pub date -
Jun 5, 2013
filing date -
Jun 7, 2012
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Abstract
An image pickup apparatus includes a focus adjustment unit, an image sensor, a focus evaluation value calculation unit, and a control unit configured to drive the focus adjustment unit based on a focus evaluation value to perform an in-focus operation. A change curve representing a change amount of a focus evaluation value indicating a focusing state of an object image includes a first slope before inversion of a sign of an inclination of the change curve at a peak value on the change curve and a second slope after inversion of a sign of an inclination of the change curve at a peak value on the change curve. The control unit determines whether the focus evaluation value corresponding to the peak value on the change curve is used for the in-focus operation based on an inclination of the first slope and an inclination of the second slope.
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