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: 20160051139
    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: Application
    Filed: November 4, 2015
    Publication date: February 25, 2016
    Inventors: Wataru Sakagawa, Yukio Sakagawa, Shigeaki Ono, Hiroki Uchida
  • Patent number: 9211062
    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: January 22, 2014
    Date of Patent: December 15, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Wataru Sakagawa, Yukio Sakagawa, Shigeaki Ono, Hiroki Uchida
  • Patent number: 9201004
    Abstract: An image processing apparatus capable of acquiring OCT tomographic images that can be captured by an OCT imaging apparatus configured to scan a target to be captured with low-coherence light along a predetermined main scanning line. The image processing apparatus includes an image acquisition unit configured to acquire a plurality of OCT tomographic images of the target to be captured along a plurality of main scanning lines that are different in direction, and a display control unit configured to display the plurality of OCT tomographic images on a display screen using a layout that can express differences in the direction of each main scanning line so as to reflect a relative relationship between respective main scanning line directions with respect to the target to be captured in respective OCT tomographic images.
    Type: Grant
    Filed: March 25, 2011
    Date of Patent: December 1, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yukio Sakagawa
  • Publication number: 20150297077
    Abstract: The present invention reduces a positional displacement of an acquired image attributable to a delay from the issuance of a drive instruction to a scanner to the scanner actually reaching an instructed drive position. An ophthalmologic apparatus has a light scanning unit which scans measuring light on an eve to be examined, an acquisition unit which receives light reflected from the eye to be examined and acquires a light receiving signal, and an instruction unit which instructs the drive position of the light scanning unit. The apparatus further includes a position detection unit which detects the current position of the light scanning unit and a measurement unit which measures the drive time delay from the issuance of an instruction by the instruction until the current position reaches the instructed drive position. The acquisition unit starts acquiring the light receiving signal at timing based on the drive time delay.
    Type: Application
    Filed: April 8, 2015
    Publication date: October 22, 2015
    Inventors: Yuki Shimozato, Wataru Sakagawa, Toshifumi Masaki, Yukio Sakagawa
  • Patent number: 9147098
    Abstract: An image processing apparatus has an obtaining unit configured to obtain a region from a medical image, and a generating unit configured to generate a display image by superimposing, on the basis of a position being in a schema image and corresponding to the region, an image of the region on a diagram representing a human body structure.
    Type: Grant
    Filed: January 8, 2009
    Date of Patent: September 29, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshio Iizuka, Yukio Sakagawa
  • Patent number: 9125561
    Abstract: For appropriately obtaining the tomographic image and the layer thickness map are provided in a short period of time regardless of involuntary eye movement, when the tomographic image is to be obtained in a specific scan pattern, a 3D tomographic image is first obtained by 3D scan, and then a tomographic image of a desired part is extracted from the image in accordance with the specific scan pattern. Further, based on the obtained 3D tomographic image, a sector for layer thickness map display, a main scanning line, and a sub-scanning line, which are displayed on a fundus image, are set movable, and tomographic images taken along both the scanning lines after the movement are obtained. The sector having a center corresponding to the intersection between those scanning lines and the layer thickness map are recalculated and displayed so as to follow the intersection.
    Type: Grant
    Filed: August 23, 2013
    Date of Patent: September 8, 2015
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Shigeaki Ono, Yukio Sakagawa
  • Patent number: 9113779
    Abstract: An image processing apparatus includes an analysis unit configured to obtain information regarding an order of display of a plurality of layers from a cross-sectional image, and a display control unit configured to perform control such that methods for displaying the plurality of layers are sequentially changed and the plurality of layers are displayed on a display unit on the basis of the information regarding the order of display.
    Type: Grant
    Filed: August 25, 2011
    Date of Patent: August 25, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yukio Sakagawa, Yasufumi Takama
  • Patent number: 9022569
    Abstract: When an anterior segment photographing mode is selected, ease of operation by an inspector is improved. An ophthalmologic apparatus includes an area changing unit for changing a movement area of an optical unit including an optical path of measuring light, when an anterior segment photographing mode for photographing an anterior segment of an eye to be inspected is selected, to be different from a movement area when a mode other than the anterior segment photographing mode is selected.
    Type: Grant
    Filed: August 30, 2012
    Date of Patent: May 5, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yasuhiro Nakahara, Shigeaki Ono, Hiroki Uchida, Yukio Sakagawa
  • Patent number: 8970849
    Abstract: This invention realizes accurate positional offset correction between a plurality of tomograms captured by using a tomography apparatus. The invention is a tomography apparatus which corrects the positional offsets between a plurality of two-dimensional tomograms constituting a three-dimensional tomogram. This apparatus includes a tomogram analysis unit (120) which extracts feature amounts representing the tissue of a measurement target, a tomogram selection unit (140) which selects a standard two-dimensional tomogram from the plurality of two-dimensional tomograms based on the feature amounts, and a tomogram position correction unit (150) which calculates the positional offset amount between the nth two-dimensional tomogram adjacent to the standard two-dimensional tomogram and the (n?1)th two-dimensional tomogram.
    Type: Grant
    Filed: June 2, 2010
    Date of Patent: March 3, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yukio Sakagawa, Makoto Sato, Hiroyuki Yamamoto
  • Patent number: 8960904
    Abstract: In order to change a size of an imaging area of a tomographic image of an object to be inspected easily, provided is an optical tomographic apparatus for acquiring a tomographic image of an object to be inspected, the optical tomographic apparatus including a control unit for controlling a measuring light path length changing unit to change an optical path length of measuring light in a case where the size of the imaging area of the tomographic image is changed, and for controlling a movable unit for moving a focus lens for focusing the measuring light to the object to be inspected along an optical path to move the focus lens in association with the change in the optical path length of the measuring light.
    Type: Grant
    Filed: August 30, 2012
    Date of Patent: February 24, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroshi Aoki, Hirofumi Yoshida, Yukio Sakagawa
  • Patent number: 8960905
    Abstract: In order to change a size of an imaging area of a tomographic image of an object to be inspected easily, provided is an optical tomographic apparatus for acquiring a tomographic image of an object to be inspected, the optical tomographic apparatus including a control unit for controlling a measuring light path length changing unit to change an optical path length of measuring light in a case where the size of the imaging area of the tomographic image is changed, and for controlling a reference light path length changing unit to change an optical path length of reference light in association with the change in the optical path length of the measuring light.
    Type: Grant
    Filed: August 30, 2012
    Date of Patent: February 24, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroshi Aoki, Hirofumi Yoshida, Yukio Sakagawa
  • Patent number: 8948473
    Abstract: A plurality of sets each including part information representing a human body part and a schema image serving as the schematic view of the human body part are held. A captured image representing the interior of the body of a patient is acquired. Hierarchical structure information is acquired, which contains part information globally representing a part corresponding to a designated portion on the captured image and part information locally representing the part corresponding to the designated portion. A set including the part information contained in the hierarchical structure information is acquired. A schema image included in the acquired set is output.
    Type: Grant
    Filed: August 3, 2009
    Date of Patent: February 3, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ryo Ishikawa, Yukio Sakagawa, Hiroyuki Shinbata
  • Patent number: 8926097
    Abstract: An imaging control apparatus which controls an imaging unit configured to capture a tomogram of the fundus of a target eye includes an acquisition unit configured to acquire information representing the direction of a fundus movement of the target eye, an analysis unit configured to analyze the direction of the fundus movement based on the information acquired by the acquisition unit, and a control unit configured to control the imaging unit so as to align the direction of imaging of the imaging unit with the direction of the fundus movement based on the analysis result of the analysis unit.
    Type: Grant
    Filed: February 9, 2012
    Date of Patent: January 6, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yukio Sakagawa
  • Patent number: 8908946
    Abstract: In order to provide a technology which allows efficient understanding of images of a disease locus and diagnosis supporting information for the images, an information processing apparatus comprises: an input unit which inputs object identification information for identifying an object; an acquiring unit which acquires one or more schemas related to the object and medical image data related to the schema, an identification unit which identifies a disease locus region in medical image data respectively related to each of the one or more schemas, a time-series schema generating unit which generates a time-series schema of the disease locus, a time-series image data generating unit which generates time-series image data of the disease locus, and a display output unit which synchronizes and outputs the time-series schema of the disease locus and the time-series image data of the disease locus.
    Type: Grant
    Filed: November 9, 2012
    Date of Patent: December 9, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazuhiro Miyasa, Hiroshi Imamura, Masaaki Imaizumi, Yukio Sakagawa
  • Publication number: 20140327878
    Abstract: In an eye fundus surface expansion observation screen, a surface moving image that is a moving image showing the surface of a predetermined region in a subject's eye is enlarged and displayed. In an eye fundus tomography expansion confirmation screen, a tomographic image showing the tomography of the subject's eye, which corresponds to a position selected from the surface moving image, is enlarged and displayed.
    Type: Application
    Filed: May 1, 2014
    Publication date: November 6, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Shigeaki Ono, Yukio Sakagawa
  • Patent number: 8876291
    Abstract: A control apparatus includes a display control unit configured to cause a display unit to display an image of an anterior segment of a subject's eye captured by an imaging unit, and a control unit configured to output, based on an operation signal output from a mouse according to an operation on the mouse when an index indicating an arbitrary position on the display unit is located on the image of the anterior segment, a control signal indicating a change amount in an optical axis direction of the imaging unit of a focal position of the image of the anterior segment relative to the imaging unit.
    Type: Grant
    Filed: March 21, 2012
    Date of Patent: November 4, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yukio Sakagawa
  • Patent number: 8820933
    Abstract: An imaging apparatus according to the present invention can cause a display unit to display a scanning range of each of a plurality of measurement light beams in an intersection image (an image in a direction intersecting a direction in which an inspection object is irradiated with the plurality of measurement light beams) of the inspection object.
    Type: Grant
    Filed: March 29, 2011
    Date of Patent: September 2, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tsutomu Utagawa, Makoto Sato, Yukio Sakagawa
  • Patent number: 8804127
    Abstract: An OCT apparatus that photographs with a plurality of measuring beams concurrently, has a mechanism for adjusting the optical path length of a reference beam for each measuring beam. Accordingly, when tomographic images photographed in this manner are displayed side by side, because the depth of photographing varies from one tomographic image to another, it is difficult for an operator to comprehend the positional relation between the photographed images. In displaying tomographic images acquired with a plurality of measuring beams, the display position of each tomographic image is adjusted based on the changed optical path length of a reference beam of the measuring beam used for the image. The tomographic images are thus aligned in height and are presented in a manner that is easy for the operator to comprehend the positional relation between the photographed images.
    Type: Grant
    Filed: August 8, 2011
    Date of Patent: August 12, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tomohiko Shimoyama, Nobuhito Suehira, Yukio Sakagawa
  • Publication number: 20140211155
    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: Application
    Filed: January 22, 2014
    Publication date: July 31, 2014
    Applicant: Canon Kabushiki Kaisha
    Inventors: Wataru Sakagawa, Yukio Sakagawa, Shigeaki Ono, Hiroki Uchida
  • Publication number: 20140211162
    Abstract: An ophthalmologic apparatus includes an imaging unit for imaging the fundus image of a subject's eye, a displacement acquisition unit for acquiring the displacement of an imaging position by the imaging unit between fundus images captured by the imaging unit, and a display control unit for displaying the fundus image captured by the imaging unit and a region of interest on the display unit so that the region of interest is positioned at a predetermined position of the fundus image based on the displacement acquired by the displacement acquisition unit and displaying the region of interest on the display unit by changing a size of the region of interest according to an range where the fundus image is captured.
    Type: Application
    Filed: January 24, 2014
    Publication date: July 31, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Ryutaro Matsuoka, Yukio Sakagawa