Patents by Inventor Keita Nakagomi

Keita Nakagomi 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: 20240071069
    Abstract: The medical image processing apparatus disclosed herein includes processing circuitry configured to acquire a medical image for setting identification information for identifying a plurality of regions in the medical image, determine a plurality of seed points in the medical image, select one of the plurality of seed points on a shortest path from a first node, the shortest path being a path in which a sum of energies between pixels in the medical image is minimized and the first node being a pixel of the medical image for which the identification information is not set, and allocate the identification information.
    Type: Application
    Filed: August 29, 2023
    Publication date: February 29, 2024
    Applicant: CANON MEDICAL SYSTEMS CORPORATION
    Inventor: Keita NAKAGOMI
  • Patent number: 11880987
    Abstract: An image processing apparatus includes a generation unit configured to generate a first distance image having a pixel value based on a distance from an outline of a region that indicates a predetermined part of the subject and is extracted from a first image, and having a resolution lower than a resolution of the first image, and generate a second distance image having a pixel value based on a distance from an outline of a region that indicates the predetermined part and is extracted from a second image, and having a resolution lower than a resolution of the second image, a first calculation unit configured to calculate first deformation information by registering the first distance image and the second distance image, and a second calculation unit configured to calculate second deformation information by registering the first image and the second image based on the first deformation information.
    Type: Grant
    Filed: June 10, 2021
    Date of Patent: January 23, 2024
    Assignee: Canon Kabushiki Kaisha
    Inventor: Keita Nakagomi
  • Patent number: 11455730
    Abstract: An image processing apparatus includes a first extraction unit configured to extract a first target region from an image using a trained classifier, a setting unit configured to set region information to be used in a graph cut segmentation method based on a first extraction result including the first target region, a second extraction unit configured to extract a second target region using the graph cut segmentation method based on the set region information, and a generation unit configured to generate a ground truth image corresponding to the image based on a second extraction result including the second target region.
    Type: Grant
    Filed: March 30, 2020
    Date of Patent: September 27, 2022
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Daisuke Furukawa, Fukashi Yamazaki, Keita Nakagomi
  • Patent number: 11263763
    Abstract: An image processing apparatus obtains segment definition information that defines a plurality of segments obtained by dividing a human body along a body axis, and obtains a three-dimensional image including a plurality of slice images indicating cross sections of a subject. The image processing apparatus identifies, based on the segment definition information, a segment to which a cross section corresponding to at least one slice image among the slice images included in the image belongs, and calculates a coordinate value of the at least one slice image, based on the identified segment and a reference coordinate system in which a coordinate value is defined for each of the segments.
    Type: Grant
    Filed: January 15, 2020
    Date of Patent: March 1, 2022
    Assignee: Canon Kabushiki Kaisha
    Inventor: Keita Nakagomi
  • Patent number: 11170505
    Abstract: An apparatus acquires a first converted image by converting resolution of a first image of a subject into first resolution, acquires a second converted image by converting resolution of a second image into the first resolution, acquires first deformation information for executing image registration between the first converted image and the second converted image with the first resolution, and generates a subtraction image with the first resolution based on the first deformation information, the subtraction image showing a difference between the first converted image and the second converted image, or generates a second subtraction image based on second deformation information obtained in such a manner that resolution of the first deformation information is converted into the resolution of the first image, the second subtraction image showing a difference between the first image and the second image.
    Type: Grant
    Filed: December 19, 2018
    Date of Patent: November 9, 2021
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yoshitaka Minami, Ryo Ishikawa, Toru Tanaka, Kiyohide Satoh, Keita Nakagomi
  • Publication number: 20210304425
    Abstract: An image processing apparatus includes a generation unit configured to generate a first distance image having a pixel value based on a distance from an outline of a region that indicates a predetermined part of the subject and is extracted from a first image, and having a resolution lower than a resolution of the first image, and generate a second distance image having a pixel value based on a distance from an outline of a region that indicates the predetermined part and is extracted from a second image, and having a resolution lower than a resolution of the second image, a first calculation unit configured to calculate first deformation information by registering the first distance image and the second distance image, and a second calculation unit configured to calculate second deformation information by registering the first image and the second image based on the first deformation information.
    Type: Application
    Filed: June 10, 2021
    Publication date: September 30, 2021
    Inventor: Keita Nakagomi
  • Publication number: 20200320713
    Abstract: An image processing apparatus includes a first extraction unit configured to extract a first target region from an image using a trained classifier, a setting unit configured to set region information to be used in a graph cut segmentation method based on a first extraction result including the first target region, a second extraction unit configured to extract a second target region using the graph cut segmentation method based on the set region information, and a generation unit configured to generate a ground truth image corresponding to the image based on a second extraction result including the second target region.
    Type: Application
    Filed: March 30, 2020
    Publication date: October 8, 2020
    Inventors: Daisuke Furukawa, Fukashi Yamazaki, Keita Nakagomi
  • Patent number: 10692215
    Abstract: An image processing apparatus includes: an obtaining unit configured to obtain a first image of an object and a second image of the object; a difference unit configured to obtain a difference image after the first image and the second image are registered; and a change unit configured to perform processing of changing a pixel value in the difference image based on a likelihood calculated using a pixel value in the first image and a pixel value in the second image.
    Type: Grant
    Filed: July 8, 2019
    Date of Patent: June 23, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Keita Nakagomi
  • Publication number: 20200151889
    Abstract: An image processing apparatus obtains segment definition information that defines a plurality of segments obtained by dividing a human body along a body axis, and obtains a three-dimensional image including a plurality of slice images indicating cross sections of a subject. The image processing apparatus identifies, based on the segment definition information, a segment to which a cross section corresponding to at least one slice image among the slice images included in the image belongs, and calculates a coordinate value of the at least one slice image, based on the identified segment and a reference coordinate system in which a coordinate value is defined for each of the segments.
    Type: Application
    Filed: January 15, 2020
    Publication date: May 14, 2020
    Inventor: Keita Nakagomi
  • Patent number: 10628945
    Abstract: An image processing apparatus includes: an obtaining unit configured to obtain a first image of an object and a second image of the object; a difference unit configured to obtain a difference image after the first image and the second image are registered; and a change unit configured to perform processing of changing a pixel value in the difference image based on a likelihood calculated using a pixel value in the first image and a pixel value in the second image.
    Type: Grant
    Filed: July 8, 2019
    Date of Patent: April 21, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Keita Nakagomi
  • Patent number: 10600182
    Abstract: An image processing apparatus includes an image obtaining unit configured to obtain a time-sequential image obtained in order of a start image, a plurality of intermediate images, and an end image, an image selecting unit configured to select a plurality of combinations of images including the start image, at least one of the plurality of intermediate images, and the end image, and a conformable image determining unit configured to determine a conformable combination from among the plurality of combinations based on image quality of the images included in each of the plurality of combinations and a similarity between the images included in each of the plurality of combinations.
    Type: Grant
    Filed: January 23, 2018
    Date of Patent: March 24, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventor: Keita Nakagomi
  • Publication number: 20190333221
    Abstract: An image processing apparatus includes: an obtaining unit configured to obtain a first image of an object and a second image of the object; a difference unit configured to obtain a difference image after the first image and the second image are registered; and a change unit configured to perform processing of changing a pixel value in the difference image based on a likelihood calculated using a pixel value in the first image and a pixel value in the second image.
    Type: Application
    Filed: July 8, 2019
    Publication date: October 31, 2019
    Inventor: Keita Nakagomi
  • Patent number: 10460449
    Abstract: An image processing apparatus comprises generating unit configured to generate a second image by changing a size of a first image such that a region of interest in the second image satisfies a predetermined criterion about a dimension; and extracting unit configured to extract the region of interest from the second image generated by the generating unit, by applying a Graph-Cut method using a Graph-Cut coefficient corresponding to the criterion to the second image.
    Type: Grant
    Filed: February 8, 2017
    Date of Patent: October 29, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Daisuke Furukawa, Keita Nakagomi, Bin Chen
  • Patent number: 10388018
    Abstract: An image processing apparatus includes: an obtaining unit configured to obtain a first image of an object and a second image of the object; a difference unit configured to obtain a difference image after the first image and the second image are registered; and a change unit configured to perform processing of changing a pixel value in the difference image based on a likelihood calculated using a pixel value in the first image and a pixel value in the second image.
    Type: Grant
    Filed: April 11, 2017
    Date of Patent: August 20, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Keita Nakagomi
  • Publication number: 20190197687
    Abstract: An apparatus acquires a first converted image by converting resolution of a first image of a subject into first resolution, acquires a second converted image by converting resolution of a second image into the first resolution, acquires first deformation information for executing image registration between the first converted image and the second converted image with the first resolution, and generates a subtraction image with the first resolution based on the first deformation information, the subtraction image showing a difference between the first converted image and the second converted image, or generates a second subtraction image based on second deformation information obtained in such a manner that resolution of the first deformation information is converted into the resolution of the first image, the second subtraction image showing a difference between the first image and the second image.
    Type: Application
    Filed: December 19, 2018
    Publication date: June 27, 2019
    Inventors: Yoshitaka Minami, Ryo Ishikawa, Toru Tanaka, Kiyohide Satoh, Keita Nakagomi
  • Patent number: 10192308
    Abstract: An image processing apparatus comprising: a division unit configured to divide, into a plurality of partial regions, a region of interest obtained from each of cross sections of a first image and a second image; a statistic information calculation unit configured to calculate statistic information of pixels included in the partial region; a degree-of-coincidence calculation unit configured to calculate a degree of coincidence between the pieces of statistic information for a partial region in the first image and a partial region in a pair of cross-sectional positions in the first image and the second image; and a specifying unit configured to specify positions of corresponding cross sections between the first image and the second image based on comparison between evaluation values each obtained by integrating the degrees of coincidence over all of the plurality of partial regions.
    Type: Grant
    Filed: April 6, 2017
    Date of Patent: January 29, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Keita Nakagomi
  • Patent number: 9996930
    Abstract: An image processing apparatus includes an image obtaining unit to obtain a time-sequential image obtained in order of a start image, a plurality of intermediate images, and an end image. A route determining unit determines a route passing from the start to the end image via at least one of the plurality of intermediate images for the time-sequential image. An image selecting unit selects a plurality of first selection images from among the plurality of intermediate images. A conformity calculating unit calculates a first conformity based on image quality of the first selection image and a similarity between the start image and the first selection image, for each of the plurality of first selection images. A conformable image determining unit determines a first conformable image from among the plurality of first selection images on the basis of the first conformity corresponding to each of the plurality of first section images.
    Type: Grant
    Filed: March 7, 2016
    Date of Patent: June 12, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventor: Keita Nakagomi
  • Publication number: 20180150954
    Abstract: An image processing apparatus includes an image obtaining unit configured to obtain a time-sequential image obtained in order of a start image, a plurality of intermediate images, and an end image, an image selecting unit configured to select a plurality of combinations of images including the start image, at least one of the plurality of intermediate images, and the end image, and a conformable image determining unit configured to determine a conformable combination from among the plurality of combinations based on image quality of the images included in each of the plurality of combinations and a similarity between the images included in each of the plurality of combinations.
    Type: Application
    Filed: January 23, 2018
    Publication date: May 31, 2018
    Inventor: Keita Nakagomi
  • Publication number: 20170301093
    Abstract: An image processing apparatus includes: an obtaining unit configured to obtain a first image of an object and a second image of the object; a difference unit configured to obtain a difference image after the first image and the second image are registered; and a change unit configured to perform processing of changing a pixel value in the difference image based on a likelihood calculated using a pixel value in the first image and a pixel value in the second image.
    Type: Application
    Filed: April 11, 2017
    Publication date: October 19, 2017
    Inventor: Keita Nakagomi
  • Publication number: 20170301091
    Abstract: An image processing apparatus comprising: a division unit configured to divide, into a plurality of partial regions, a region of interest obtained from each of cross sections of a first image and a second image; a statistic information calculation unit configured to calculate statistic information of pixels included in the partial region; a degree-of-coincidence calculation unit configured to calculate a degree of coincidence between the pieces of statistic information for a partial region in the first image and a partial region in a pair of cross-sectional positions in the first image and the second image; and a specifying unit configured to specify positions of corresponding cross sections between the first image and the second image based on comparison between evaluation values each obtained by integrating the degrees of coincidence over all of the plurality of partial regions.
    Type: Application
    Filed: April 6, 2017
    Publication date: October 19, 2017
    Inventor: Keita Nakagomi