Canon Kabushiki Kaisha

Yuichi Ariga

Kenji Ishii

Atsushi Sugawara

Yoshinobu Okano

Yosuke Mine

An accessory and an electronic device capable of suppressing malfunction and failure of the accessory when a command to be executed by the accessory is transmitted from the electronic device to the accessory and reducing the memory capacity. The accessory is communicably connected to the electronic device. The accessory includes a communication unit that communicates with the electronic device, a storage unit that allows reading therefrom and writing therein and stores a flag indicating whether execution of a command by the accessory is allowed or not, a control unit that, upon receipt of a predetermined command from the electronic device, does not execute the predetermined command in a case where the flag indicates that execution of the command is not allowed, and executes the predetermined command in a case where execution of the command is allowed.

Accessory, method of controlling accessory, electronic device, method of controlling electronic device, communication system, and storage medium

An electronic apparatus that is capable of reducing occurrence of malfunction when an accessory is attached without enlarging an accessory shoe device. The electronic apparatus includes an accessory shoe device and a controller. The accessory shoe device is electrically connectable with an accessory and has terminals that are arranged in a line in a first direction that intersects perpendicularly with an attaching direction of the accessory. The controller is electrically connected to the terminals. At least one of the terminals differs from the other terminals in a length of an externally exposed part in a second direction that intersects perpendicularly with both the attaching direction and the first direction.

Electronic apparatus with accessory shoe device and accessory attachable to accessory shoe device

An image pickup apparatus that is capable of reducing influence of abnormal reflection light at pre-emission upon determination of an emission amount for main photographing. The image pickup apparatus calculates reflection luminances of reflected light from an object at pre-emission of a lighting device, detects a face area from an image, divides the face area into blocks, calculates a face reflection luminance from a weighted average of reflection luminances of the blocks and first weights of the blocks, calculates a face ambient light luminance from a weighted average of ambient light luminances of the object of the blocks and second weights of the blocks, and determines an emission amount of the lighting device for main photographing with using the face reflection luminance and the ambient light luminance. A first weight of an abnormal luminance block is reduced than that of a block other than the abnormal luminance block.

Image pickup apparatus that controls flash emission amount at photographing and control method therefor

There is provided an image capturing apparatus comprising an image capturing unit. A control unit controls the image capturing unit to capture a first image having exposure unevenness caused by flicker in a light source. A detection unit detects a timing at which there is a low change in a light amount caused by the flicker, based on the exposure unevenness in the first image. An accepting unit accepts an image capturing instruction. The control unit controls the image capturing unit to capture a second image at the detected timing in response to the image capturing instruction.

Image capturing apparatus, image capturing method, and control method

Image capturing apparatus, image capturing method, and control method for reducing the influence of flicker on still image exposure

An image pickup apparatus which is capable of, when performing continuous shooting at high shutter speed under an artificial light source with varying amounts of light, reducing the effects of a change in the amount of light on a picked-up image without decreasing frame speed. A frequency and a characteristic point of a change in the amount of light of flicker are detected based on an image signal read out from an image pickup device. Based on the frequency detected at first timing before continuous shooting is performed and the characteristic point detected at second timing later than the first timing during continuous shooting, a characteristic point of a change in the amount of light of flicker after the second timing is predicted. Timing of light exposure is controlled so as to be coincident with the characteristic point after the second timing.

Image pickup apparatus that reduces unevenness of exposure caused by artificial light source, method of detecting change in amount of light, and storage medium

An imaging apparatus includes an imaging unit for picking up an optical image of an object and generating image pickup data which can be refocused, a detection unit for detecting a focus state of the optical image of the object, a prediction unit for predicting an in-focus position of the optical image of the object on the basis of a detection result of the detection unit, and a focus adjustment unit for driving a focus lens on the basis of the in-focus position predicted by the prediction unit, wherein in a case where the imaging unit picks up a plurality of images from the object, the focus adjustment unit drives the focus lens to a position deviated from the in-focus position predicted by the prediction unit by a predetermined amount, and has a plurality of patterns of a position deviated by the predetermined amount.

Imaging apparatus and its control method and program

An image capturing apparatus includes a detection unit that detects brightness of light from an object, an XY addressing type of image sensor, a focal plane shutter having a mechanical second curtain shutter, an electronic first curtain shutter that resets the pixels in each line, and causes accumulation of charges in the pixels to start, a period detection unit that detects periodic variation in a light amount, a prediction unit that, based on the period of the variation in the light amount, predicts variation in the light amount in a predetermined exposure time, and a control unit that controls a reset time of the electronic first curtain shutter such that charge accumulation amounts of the pixels of each line fall within a predetermined range according to the variation in the light amount.

Image capturing apparatus, method for controlling the same, and storage medium

Each microlens exhibits a distortion aberration characteristic in which the ratio of a range where a light beam having passed through the microlens forms an image on a predetermined number of pixels associated with the microlens when the imaging optical system takes the second f-number, to a range where a light beam having passed through the microlens forms an image when the imaging optical system takes the first f-number is higher than the ratio of the first f-number to the second f-number.

Image sensing apparatus

An image pickup apparatus capable of generating a strobe emission signal in a proper timing even when an electronic front curtain shutter is used in strobe photographing. The image pickup apparatus includes an image pickup device having pixels arranged in matrix and configured to store charges generated according to a received amount of light. A vertical scanning circuit controls travel of the electronic front curtain shutter such that the image pickup device sequentially receives light on a per line basis, starting from a first scan line. When it is detected that the electronic front curtain shutter reaches a predetermined scan line, a NOR gate outputs a light emission timing signal, whereby light is emitted from a light emission unit such as a strobe.

Image pickup apparatus and control method therefor

A camera for thrusting a film from a film cartridge by rotationally driving a spool in the film cartridge has a measuring construction for measuring the amount of the film thrust from the film cartridge, a sensing construction for sensing the position of a leader of the film thrust from the film cartridge, and a determining circuit for determining whether the film is moving properly, based on the measured thrust amount of the film and the sensed position of the leader of the film.

Growing community of inventors

Tokyo, Japan

Yuichi Ariga