Imaging apparatus and its control method

摘要

An imaging apparatus includes an imaging plane phase-difference type first focus detecting unit and a contrast type second focus detecting unit. A saturation detecting unit detects saturation of focus detecting pixels or imaging pixels provided in an imaging element. A brightness detecting unit detects the brightness of an object. If the number of pixels detected by the saturation detecting unit exceeds a predetermined value or the brightness of an object detected by the brightness detecting unit is less than a predetermined value, a CPU controls a focus adjustment operation only using a first detection amount. Alternatively, the CPU controls a focus adjustment operation based on the result obtained by weighting processing of a first detection amount and a second detection amount in response to an increase in the number of pixels of which saturation of the outputs has been detected or a decrease in the brightness of an object.

主权项

1. An imaging apparatus comprising:
an imaging device that outputs a parallax image of a first image signal and a second image signal; a first focus detecting unit configured to calculate a defocus amount by a phase-difference detection method using the first signal and the second image signal; a second focus detecting unit configured to calculate a contrast evaluation value based on a combined signal, wherein the combined signal is a signal obtained by relatively shifting phases of the first and second image signals and combining the first and second image signals; and a saturation detecting unit configured to detect saturated pixel signal of the first and second image signals, and a control unit configured to, when a number of the saturated pixel signals detected by the saturation detecting unit is a first value, control a focus adjustment operation using a result of the first focus detecting unit, whereas when the number of the saturated pixel signals detected by the saturation detecting unit is a second value which is less than the first value, the control unit controls the focus adjustment operation using the result of the first focus detecting unit and a result of the second focus detecting unit.