Image capturing apparatus and control method for image capturing apparatus

摘要

An image capturing apparatus includes: an imaging element including a first photoelectric conversion cell that outputs a first signal for phase difference detection obtained by detecting a plurality of light fluxes transmitted through different exit pupils of a photographing optical system using a plurality of focus detection pixels and a second photoelectric conversion cell that outputs a second signal for image generation obtained by detecting an object image transmitted through the photographing optical system using an imaging pixel. A contrast calculating unit calculates contrast information on the object image based on at least one of the first signal and the second signal; a focus detecting unit performs focus detection using a phase difference method on the basis of the first signal, and outputs an estimate for focus adjustment; a reliability estimating unit estimates reliability of a result obtained by the focus detecting unit.

主权项

1. A focus adjustment apparatus comprising:
an imaging element including a first photoelectric conversion cell that outputs a first signal for phase difference detection obtained by detecting a plurality of light fluxes transmitted through different exit pupils of a photographing optical system using a plurality of focus detection pixels and a second photoelectric conversion cell that outputs a second signal for image generation obtained by detecting an object image transmitted through the photographing optical system using an imaging pixel; a contrast calculating unit for calculating contrast information on the object image based on at least one of the first signal and the second signal; a focus detecting unit for performing focus detection using a phase difference method on the basis of the first signal; and a reliability estimating unit for estimating reliability of a result by the focus detecting unit, wherein the reliability estimating unit estimates the reliability of the result by the focus detecting unit on the basis of correlation between information on contrast estimate by the contrast calculating unit and information on a defocus amount by the focus detecting unit, and wherein the reliability estimating unit determines that the reliability of the result by the focus detecting unit is low in a case where the information on the contrast estimate is higher than a first threshold value and the information on the defocus amount is larger than a second threshold value.