Canon Kabushiki Kaisha

Takashi Ichimiya

Masanori Ohtsuka

Takayuki Shu

Yasuhiro Harada

Hiroshi Abe

Kouji Ikeda

Makoto Ikeda

Ryuta Suzuki

Yosuke Mine

Koji Oshima

Takanobu Tsunemiya

Minoru Takasaki

Line-of-sight detection taking into account the shape of the pupil is performed. A central processing unit (CPU) detects a group of contour coordinates of the pupil from an eyeball image obtained as a result of capturing an image of the eyeball of an observer and performs control to perform line-of-sight detection taking into account the shape of the pupil.

Line-of-sight detection device and control method for controlling the same

A display apparatus includes light emitting elements that are driven by current and a voltage control unit that controls a driving voltage for driving the light emitting elements based on a temperature of the display apparatus. The voltage control unit performs control such that an amount of change in the driving voltage per unit time does not exceed a predetermined limited range. The predetermined limited range is determined based on a relationship between the change in the driving voltage and a change in a light emission luminance of the light emitting elements.

Display apparatus and control method

An apparatus includes a first capturing unit configured to obtain a first image; and a second capturing unit configured to obtain a second image having a wider angle of view than an angle of view of the first image. The apparatus controls each of a first display device corresponding to one eye of a user and a second display device corresponding to the other eye of the user to display an image based on the first image or the second image. In a case where no subject exists in the first image, the apparatus causes at least one of the first display device and the second display device to display the second image.

Apparatus, method of same, and storage medium that utilizes captured images having different angles of view

A focus detection apparatus includes an image sensor having a plurality of pixels and an AD converter configured to switch a low-luminance conversion mode and a high-luminance conversion mode, a determination unit configured to determine whether an output signal is a signal AD converted in both the low-luminance conversion mode and the high-luminance conversion mode or a signal AD converted in only one of the two modes, an inhibition unit configured to, in a case where the output signal from the AD converter is a signal AD converted in both the two modes, inhibit a level difference of the output signal at a boundary between the two modes, and a calculation unit configured to, based on the signal for which the level difference is inhibited, calculate an amount of defocus of the imaging lens.

Focus detection apparatus and method which performs highly accurate AF control independent of the brightness of the subject

An image capturing apparatus includes a light receiving sensor including two-dimensionally arranged pixels and configured to photoelectrically convert a pair of object images and to output a first image signal and a second image signal, each of the first image signal and the second image signal corresponding to a respective object image of the pair of object images; a calculation unit configured to calculate a first phase difference between the first image signal and the second image signal in the first direction and a second phase difference in a second direction; a focus detection unit configured to calculate a first focus detection result based on the first phase difference; and a determination unit configured to determine presence or absence of heat haze based on the second phase difference.

Image capturing apparatus and control method therefor and storage medium

A focus detection apparatus includes a first acquirer configured to acquire a first distance as a distance between a pair of object images in the first direction based on the pair of phase difference image signals, a second acquirer configured to acquire a correction value corresponding to a second distance as the distance in the second direction, and a calculator configured to calculate the phase difference using the first distance and the correction value.

Focus detection apparatus, focus control apparatus, image capturing apparatus, focus detection method, and storage medium

A focus detection apparatus comprises a line sensor including a photoelectric conversion element and an integrating capacitor, a storage unit configured to store information concerning a defective pixel, a first comparison unit configured to compare a signal from the defective pixel with a predetermined threshold, a switching unit configured to switch between a first accumulation mode and a second accumulation mode, and a control unit configured to control the switching unit so as to set the line sensor in the first accumulation mode if the first comparison unit determines that a signal from the defective pixel is not more than the predetermined threshold and set the line sensor in the second accumulation mode if the first comparison unit determines that a signal from the defective pixel is larger than the threshold.

Focus detection apparatus, method of controlling the same, and storage medium

A focus detection apparatus comprises: a determination unit that determines whether a flicker light source is included in focus detection areas; a plurality of sensors for focus detection that correspond to the focus detection areas, and accumulate electric charges corresponding to received light; and a controller that controls accumulation in the sensors. The controller monitors a signal that is based on electric charges accumulated in the sensors, and performs first control for stopping accumulation in a sensor in which the signal has exceeded a predetermined threshold value, and second control for stopping accumulation in a sensor which continues accumulation of electric charges when a maximum accumulation period has reached. The controller sets the maximum accumulation period based on a determination result by the determination unit and the accumulation period of a first sensor in which the first control is performed first.

Focus detection apparatus and method, and image capturing apparatus

A photoelectric converter includes a photoelectric conversion portion (PD) which receives light from an object to generate charges, a transfer portion (MTX) which transfers the charges generated by the photoelectric conversion portion, a capacitance portion (Cfd, Cs) which accumulates the charges transferred from the transfer portion, a determination unit () which determines whether an accumulation of the charges in the capacitance portion is to be stopped based on a signal corresponding to a charge amount accumulated in the capacitance portion during a first time period, and a setting unit (ST) which sets a height of a potential barrier in the transfer portion (transfer channel region), and the setting unit changes the height of the potential barrier in the transfer portion between the first time period and a second time period different from the first time period.

Photoelectric converter, focus detection apparatus, and optical apparatus which are used for autofocusing

A focus detection apparatus comprises a plurality of sensor groups, each comprising a plurality of sensors, each including a photoelectric converter and a storage portion, and controls part of the sensor groups according to a first accumulation method, in which charge generated by a photoelectric converter is accumulated in itself, and to a second accumulation method, in which charge generated by a photoelectric converter is accumulated in a storage portion. A sensor group corresponding to a selected focus detection area is controlled according to the first accumulation method, and a sensor group adjacent to the sensor group controlled according to the first accumulation method is controlled according to the second accumulation method. A monitor unit monitors a signal level of the charge stored in the storage portion corresponding to the photoelectric converter controlled according to the second accumulation method.

Focus detection apparatus, method for controlling the same and image capturing apparatus

A focus detection apparatus comprises a pair of line sensors that generate a pair of image signals by photo-electrically converting an object image, calculation unit configured to calculate a defocus amount using the image signals, and control unit configured to control the line sensors to execute a charge accumulation operation until output levels of the line sensors reach a first voltage level based on a saturated voltage, wherein the control unit switches the saturated voltage based on luminance information.

Focus detection apparatus, imaging apparatus, and control method of focus detection apparatus

A focus adjustment apparatus that displays an in-focus state in a display region in association with control of a focus lens position. The apparatus includes a signal generation unit configured to output a pair of image signals from a focus detection region having a plurality of corresponding display regions, the image signals being generated by photoelectrically converting light having passed through an imaging optical system, and a control unit configured to detect a phase difference of the pair of image signals output from the focus detection region, and to control a position of the focus lens based on the phase difference detection result. The control unit detects the phase difference corresponding to divided regions formed by dividing the focus detection region, and displays an in-focus state in the display region in accordance with the control of the focus lens position control based on the phase difference detection result.

Focus adjustment apparatus and control method therefor

A focus detection sensor includes a line sensor comprised of a pair of sensor arrays in which a plurality of pixels are arranged. The sensor arrays include a pixel of a first type having an arrangement for transferring charges generated by a photoelectric conversion device to a corresponding memory device and causing the memory device to integrate the charges during a charge accumulation period, and a pixel of a second type having an arrangement for integrating, in the pixel, the charges generated by the photoelectric conversion device during the charge accumulation period without transferring the charges to the memory device until the end of the charge accumulation period, and transferring the charges to the corresponding memory device when the charge accumulation period has ended. An accurate charge accumulation result can be obtained by a simple arrangement.

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Yokohama, Japan

Takashi Ichimiya