Patents by Inventor Yukio Sakagawa

Yukio Sakagawa 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).

  • Publication number: 20180035885
    Abstract: An image processing apparatus converts an intensity distribution of at least one of a plurality of regions of a tomographic image of an eye by using an amount of conversion which is greater than an amount of conversion used to convert an intensity distribution of another one of the plurality of regions, the tomographic image being obtained by performing tomographic imaging on the eye by using optical interference.
    Type: Application
    Filed: October 16, 2017
    Publication date: February 8, 2018
    Inventors: Hiroki Uchida, Yukio Sakagawa, Krzysztof Piotrowski
  • Patent number: 9852269
    Abstract: A diagnosis support system which performs computer processing of data obtained from an object to be examined and presents the obtained diagnostic information is disclosed. The diagnosis support apparatus includes a diagnosis support processing unit which processes data obtained from the object to extract diagnosis support information, a storage unit which stores the examination history of the object, and a changing unit which changes a processing method in the diagnosis support processing unit in accordance with the examination history of the object stored in the storage unit. In at least one embodiment, diagnosis processing is executed to obtain medical diagnostic information by performing computer processing of data obtained from the object, and the processing method for diagnosis support processing is changed in accordance with the examination history of the object.
    Type: Grant
    Filed: September 9, 2008
    Date of Patent: December 26, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yukio Sakagawa, Hiroshi Imamura, Akihiro Katayama, Hiroyuki Shinbata
  • Patent number: 9839350
    Abstract: A control apparatus of an imaging apparatus, includes a selection unit configured to select an image-capturing site of a subject to be examined, a control unit configured to control adjustment of a member of the imaging apparatus, according to the selected image-capturing site, and a determination unit configured to determine whether to perform the adjustment or not in response to a change of image-capturing sites through the selection by the selection unit, based on image-capturing conditions for the image-capturing sites before and after the change of the image-capturing sites.
    Type: Grant
    Filed: March 27, 2012
    Date of Patent: December 12, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takashi Naba, Yukio Sakagawa
  • Patent number: 9820646
    Abstract: An image processing apparatus converts an intensity distribution of at least one of a plurality of regions of a tomographic image of an eye by using an amount of conversion which is greater than an amount of conversion used to convert an intensity distribution of another one of the plurality of regions, the tomographic image being obtained by performing tomographic imaging on the eye by using optical interference.
    Type: Grant
    Filed: July 8, 2016
    Date of Patent: November 21, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroki Uchida, Yukio Sakagawa, Krzysztof Marek Piotrowski
  • Publication number: 20170231484
    Abstract: Provided is an image processing apparatus, including: an information acquiring unit configured to acquire three-dimensional polarization tomographic information and three-dimensional motion contrast information of an object to be inspected using tomographic signals of light beams having polarizations different from each other, which are obtained by splitting combined light obtained by combining return light from the object to be inspected irradiated with measuring light and reference light corresponding to the measuring light; an extracting unit configured to extract a specific region of the object to be inspected using the three-dimensional polarization tomographic information; and an image generating unit configured to generate a motion contrast enface image of the extracted specific region using the three-dimensional motion contrast information.
    Type: Application
    Filed: January 18, 2017
    Publication date: August 17, 2017
    Inventors: Isao Komine, Masashi Kotoku, Nobuhiro Tomatsu, Yukio Sakagawa, Tomoyuki Makihira
  • Patent number: 9730581
    Abstract: An optical coherence tomographic imaging apparatus includes a movement amount acquisition unit configured to acquire the amount of subject's eye movement based on a plurality of images of the subject's eye acquired at different times, a determination unit configured to determine whether the amount of subject's eye movement before a scan by the scanning unit exceeds a threshold value, and a control unit configured to, in a case the amount of subject's eye movement before the scan is equal to or smaller than the threshold value, control the scanning unit to perform scanning position correction between a scan and the next scan based on the amount of movement.
    Type: Grant
    Filed: November 4, 2015
    Date of Patent: August 15, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Wataru Sakagawa, Yukio Sakagawa, Shigeaki Ono, Hiroki Uchida
  • Patent number: 9585554
    Abstract: There is provided an image processing apparatus, comprising: a tomographic image acquiring unit for acquiring a tomographic image of a retina; an instruction unit for instructing for a change in the positions of display forms indicating a plurality of regions in one of the display forms indicating a plurality of layer boundaries of a retina; and a display control unit for causing the display unit to display respective display forms indicating the plurality of layer boundaries in positions corresponding to the plurality of layer boundaries in the tomographic image in an overlapped state, and in a case of instructing for the change in the position of at least one of display forms, for causing the display unit to display the display form instructed with the display form different from other display forms.
    Type: Grant
    Filed: August 8, 2013
    Date of Patent: March 7, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Krzysztof Marek Piotrowski, Yukio Sakagawa
  • Patent number: 9566002
    Abstract: To ensure display of a region of interest on a fundus image and a tomographic image of an eye to be inspected in a correspondence manner, an apparatus for processing images of an eye to be inspected includes: a unit that acquires a fundus image of an eye to be inspected; a unit that designates an arbitrary point on the fundus image; a unit that acquires a tomographic image of the eye to be inspected; a unit that calculates a point on the tomographic image corresponding to the arbitrary point; and a unit that converts a coordinate system for displaying the tomographic image and the fundus image in association with each other on the basis of positions of the arbitrary point and the corresponding point.
    Type: Grant
    Filed: January 22, 2013
    Date of Patent: February 14, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yasuhiro Nakahara, Shigeaki Ono, Yukio Sakagawa, Hiroki Uchida
  • Publication number: 20170014025
    Abstract: An image processing apparatus converts an intensity distribution of at least one of a plurality of regions of a tomographic image of an eye by using an amount of conversion which is greater than an amount of conversion used to convert an intensity distribution of another one of the plurality of regions, the tomographic image being obtained by performing tomographic imaging on the eye by using optical interference.
    Type: Application
    Filed: July 8, 2016
    Publication date: January 19, 2017
    Inventors: Hiroki Uchida, Yukio Sakagawa, Krzysztof Marek Piotrowski
  • Publication number: 20160367130
    Abstract: A diagnosis support apparatus comprises an acquiring unit that acquires a plurality of examination data items having different examination dates, a setting unit that sets an extraction condition for examination data items, an extracting unit that extracts, from the plurality of acquired examination data items, examination data items corresponding to the set extraction condition, and a displaying unit that arranges and displays the extracted examination data items, wherein the setting unit sets the extraction condition based on an interval between examination dates of examination data items.
    Type: Application
    Filed: August 30, 2016
    Publication date: December 22, 2016
    Inventors: Katsutoshi Natsuhori, Shigeaki Ono, Yukio Sakagawa, Hiroki Uchida
  • Publication number: 20160317018
    Abstract: An image generation method includes an acquisition step of acquiring a plurality of pieces of tomogram data of a subject, the plurality of pieces of tomogram data representing cross-sections at a substantially identical position of the subject; a calculation step of calculating a motion contrast by using pieces of pixel data corresponding to one another among the plurality of pieces of tomogram data that have been acquired; a comparison step of comparing the motion contrast with a threshold; a generation step of generating a motion contrast image in which a brightness corresponding to the motion contrast that is lower than the threshold is lower than a brightness corresponding to the motion contrast that is higher than the threshold; and a change step of changing the threshold.
    Type: Application
    Filed: April 27, 2016
    Publication date: November 3, 2016
    Inventor: Yukio Sakagawa
  • Patent number: 9439562
    Abstract: A diagnosis support apparatus comprises an acquiring unit that acquires a plurality of examination data items having different examination dates, a setting unit that sets an extraction condition for examination data items, an extracting unit that extracts, from the plurality of acquired examination data items, examination data items corresponding to the set extraction condition, and a displaying unit that arranges and displays the extracted examination data items, wherein the setting unit sets the extraction condition based on an interval between examination dates of examination data items.
    Type: Grant
    Filed: August 27, 2013
    Date of Patent: September 13, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Katsutoshi Natsuhori, Shigeaki Ono, Yukio Sakagawa, Hiroki Uchida
  • Publication number: 20160213246
    Abstract: A tomographic-image pickup unit is controlled so as to capture a tomographic image in response to a signal input from a signal input unit. Then, a display unit is controlled so as to display the captured tomographic image. An eyeground-image pickup unit is controlled so as to capture a two-dimensional image in response to a signal input from the signal input unit while the tomographic image is displayed on the display unit. Therewith, the user can more easily perform imaging, and the time load on the subject is reduced.
    Type: Application
    Filed: April 1, 2016
    Publication date: July 28, 2016
    Inventors: Kenji Muto, Yasuyuki Numajiri, Nobuhito Suehira, Makoto Sato, Yukio Sakagawa, Akihiro Katayama
  • Publication number: 20160213245
    Abstract: A tomographic image capturing apparatus includes a fixation lamp configured to guide a line of sight of a subject's eye, and a control unit configured to control a projection position of measuring light according to a predetermined position on a fundus of the subject's eye and a projection position of the fixation lamp.
    Type: Application
    Filed: April 1, 2016
    Publication date: July 28, 2016
    Inventor: Yukio Sakagawa
  • Patent number: 9326674
    Abstract: An optical tomographic imaging apparatus includes a measurement light optical path length changing unit configured to change an optical path length of measurement light. In a case where any one of a plurality of imaging regions of an object (for example, a region of an anterior eye of a subject's eye and a region of a fundus of the subject's eye) is selected, the optical tomographic imaging apparatus can control the measurement light optical path length changing unit according to a size of an imaging range of a tomographic image corresponding to the selected imaging region.
    Type: Grant
    Filed: January 22, 2014
    Date of Patent: May 3, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toshifumi Masaki, Hiroshi Aoki, Yukio Sakagawa
  • Patent number: 9326676
    Abstract: A tomographic image capturing apparatus includes a fixation lamp configured to guide a line of sight of a subject's eye, and a control unit configured to control a projection position of measuring light according to a predetermined position on a fundus of the subject's eye and a projection position of the fixation lamp.
    Type: Grant
    Filed: October 13, 2010
    Date of Patent: May 3, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yukio Sakagawa
  • Patent number: 9326678
    Abstract: A tomographic-image pickup unit is controlled so as to capture a tomographic image in response to a signal input from a signal input unit. Then, a display unit is controlled so as to display the captured. tomographic image. An eyeground-image pickup unit is controlled so as to capture a two-dimensional image in response to a signal input from the signal input unit while the tomographic image. is displayed on the display unit. Therewith, the user can more easily perform imaging, and the time load on the subject is reduced.
    Type: Grant
    Filed: June 17, 2010
    Date of Patent: May 3, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kenji Muto, Yasuyuki Numajiri, Nobuhito Suehira, Makoto Sato, Yukio Sakagawa, Akihiro Katayama
  • Patent number: 9295382
    Abstract: An ophthalmic apparatus comprises an imaging unit which images a fundus of an eye to be examined; a calculation unit which calculates a displacement of an imaging position of the imaging unit between fundus images captured by the imaging unit; and a display control unit which causes a display unit to display a fundus image captured by the imaging unit and a region of interest so as to locate the region of interest at a predetermined position on the fundus image based on the displacement calculated by the calculation unit.
    Type: Grant
    Filed: August 30, 2012
    Date of Patent: March 29, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yukio Sakagawa
  • Patent number: 9277859
    Abstract: An optical tomographic imaging apparatus includes an instruction unit configured to issue an instruction on a size of an imaging range of a tomographic image, and a control unit configured to control a measurement light optical path length changing unit to perform alignment in a depth direction with respect an object after the instruction by the instruction unit, and change an optical path length of measurement light by a distance corresponding to a change of the size on which the instruction is issued.
    Type: Grant
    Filed: January 24, 2014
    Date of Patent: March 8, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Keisuke Oyaizu, Hiroshi Aoki, Yukio Sakagawa, Hirofumi Yoshida
  • Patent number: 9277860
    Abstract: An optical tomographic imaging apparatus includes a control unit configured to, in a case where an instruction to narrow an imaging range of a tomographic image is issued, control a measurement light optical path length changing unit to reduce an optical path length of measurement light and make a changing speed of the optical path length of the measurement light lower than in a case where an instruction to widen the imaging range is issued.
    Type: Grant
    Filed: January 29, 2014
    Date of Patent: March 8, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Isao Komine, Hiroshi Aoki, Hirofumi Yoshida, Yukio Sakagawa, Hiroyuki Inoue