Patents by Inventor Yuichi Ariga

Yuichi Ariga has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11275289
    Abstract: 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.
    Type: Grant
    Filed: August 4, 2020
    Date of Patent: March 15, 2022
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yosuke Mine, Yuichi Ariga
  • Publication number: 20210063844
    Abstract: 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 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.
    Type: Application
    Filed: August 4, 2020
    Publication date: March 4, 2021
    Inventors: Yosuke Mine, Yuichi Ariga
  • Patent number: 9794493
    Abstract: 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.
    Type: Grant
    Filed: April 17, 2017
    Date of Patent: October 17, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yuichi Ariga
  • Publication number: 20170280998
    Abstract: The problem addressed by the present invention is to provide a tonometer that is capable of measuring the intraocular pressure of a subject eye without the subject or persons around him experiencing noise, and without blowing air against the subject eye. With the present invention, a non contact eyeball vibration type tonometer is provided that includes: a parametric speaker that directs sound waves against the front surface of a subject eye; a detection device that detects data related to vibration of the subject eye caused by these sound waves from the parametric speaker; and a processing device that calculates the intraocular pressure of the subject eye from this vibration data for the subject eye.
    Type: Application
    Filed: April 5, 2016
    Publication date: October 5, 2017
    Inventors: Yuichi Ariga, Sigehiko Masubuchi
  • Patent number: 9756258
    Abstract: 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.
    Type: Grant
    Filed: October 22, 2014
    Date of Patent: September 5, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yuichi Ariga
  • Publication number: 20170223251
    Abstract: 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.
    Type: Application
    Filed: April 17, 2017
    Publication date: August 3, 2017
    Inventor: Yuichi Ariga
  • Patent number: 9716840
    Abstract: 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.
    Type: Grant
    Filed: May 3, 2016
    Date of Patent: July 25, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yuichi Ariga
  • Patent number: 9681037
    Abstract: 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.
    Type: Grant
    Filed: April 10, 2014
    Date of Patent: June 13, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Atsushi Sugawara, Yuichi Ariga
  • Patent number: 9571750
    Abstract: 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.
    Type: Grant
    Filed: June 17, 2015
    Date of Patent: February 14, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yuichi Ariga
  • Publication number: 20160330359
    Abstract: 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.
    Type: Application
    Filed: May 3, 2016
    Publication date: November 10, 2016
    Inventor: Yuichi Ariga
  • Publication number: 20150373249
    Abstract: 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.
    Type: Application
    Filed: June 17, 2015
    Publication date: December 24, 2015
    Inventor: Yuichi Ariga
  • Patent number: 9165965
    Abstract: 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.
    Type: Grant
    Filed: September 16, 2013
    Date of Patent: October 20, 2015
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Yuichi Ariga
  • Publication number: 20150116537
    Abstract: 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.
    Type: Application
    Filed: October 22, 2014
    Publication date: April 30, 2015
    Inventor: Yuichi Ariga
  • Patent number: 9008497
    Abstract: 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.
    Type: Grant
    Filed: May 16, 2011
    Date of Patent: April 14, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yuichi Ariga
  • Publication number: 20140313373
    Abstract: 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.
    Type: Application
    Filed: April 10, 2014
    Publication date: October 23, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Atsushi Sugawara, Yuichi Ariga
  • Publication number: 20140084139
    Abstract: 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.
    Type: Application
    Filed: September 16, 2013
    Publication date: March 27, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Yuichi Ariga
  • Publication number: 20110293257
    Abstract: 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.
    Type: Application
    Filed: May 16, 2011
    Publication date: December 1, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Yuichi Ariga
  • Patent number: 6175696
    Abstract: 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.
    Type: Grant
    Filed: November 14, 1997
    Date of Patent: January 16, 2001
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yuichi Ariga