Canon Kabushiki Kaisha

Hiroaki Kurisu

Naoki Iwasaki

Masaki Tokioka

Teruhiko Ueyama

Nobuhiro Shibata

Hidetoshi Abe

Takeshi Omata

Hiromi Kotoku

Kenya Fukabori

An apparatus that moves a focus lens, performs a scan operation of sequentially acquiring a focus signal, acquires a focus position of the focus lens based on the focus signal, and includes: a determination unit configured to determine whether an object is blinking at a predetermined period, and a processing unit configured to perform a filtering process in a time axis direction on the acquired focus signal where the object is blinking at the predetermined period.

Focus detection apparatus, and focus detection method which performs blinking detection

A control apparatus includes a determination unit configured to determine whether or not a point light source area exists in an image, and a focus control unit configured to perform a focus control based on an evaluation value sequentially acquired from the image while moving the focus lens. The focus control unit changes a method of the focus control based on a position of the point light source area.

Control apparatus, imaging apparatus, control method, and storage medium

An imaging apparatus includes an imaging device that photoelectrically converts an optical image obtained through a focus lens. The focus lens is moved to a focus position set by focus detection performed based on image signals from the imaging device with a first aperture value. A first correction amount of the set focus position is acquired according to a difference between the first aperture value and a second aperture value to be used at a time of photographing. Photographing is executed at a determined focus position at the time of photographing, by a user's operation. If the first correction amount is larger than a predetermined amount, a focus position corrected according to the first correction amount is determined as the focus position at the time of photographing, and if not, the set focus position is determined as the focus position at the time of photographing.

Imaging apparatus having autofocus function, and focus adjustment method therefor

An imaging apparatus includes a storage unit configured to store beforehand a focus position serving as a reference for a predetermined subject, and a unit configured to drive a focus lens at a position away by a predetermined depth from the focus position serving as a reference that is stored, and calculate a defocus amount.

Imaging apparatus and control method of the same

An image pickup apparatus corrects defocusing caused by an aperture difference to prevent degradation in AF focusing accuracy. In the image pickup apparatus, an image shift amount is detected based on a pair of picture signals by a phase difference AF method. When a first aperture at a time of a focus detection operation for detecting an image shift amount by a focus detection unit differs from a second aperture at a time of an image shooting operation for recording an image signal acquired from an image pickup device, a correction amount of a position of a focus lens due to a difference between a first aperture and a second aperture is calculated, by using a correction amount acquired from a first storage unit and a difference in the position of the focus lens between the first aperture and the second aperture acquired from a second storage unit.

Image pickup apparatus having function of correcting defocusing and method for controlling the same

A focus adjustment apparatus includes a signal generating unit configured to generate signals of two images respectively corresponding to a pair of light fluxes passing through different pupil regions of a focusing lens, a two-image displacement amount calculation unit configured to calculate a displacement amount of the two images with respect to each other based on a phase difference of the signals of the two images, a steepness calculating unit configured to calculate a steepness of change in a correlation change amount of the two images, a steepness normalization unit that normalizes the steepness, and an evaluating unit configured to evaluate reliability of the displacement amount of the two images based on the normalized steepness.

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Tokyo, Japan

Hiroaki Kurisu