Patents by Inventor Mariko HIROKAWA

Mariko HIROKAWA 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: 20220378381
    Abstract: An image display method executed by a processor comprises displaying a screen including a two-dimensional fundus image of an examined eye and a three-dimensional eyeball image of the examined eye, finding a second region in the three-dimensional eyeball image that corresponds to a first region specified in the two-dimensional fundus image, and displaying a mark indicating the second region in the three-dimensional eyeball image.
    Type: Application
    Filed: August 9, 2022
    Publication date: December 1, 2022
    Applicant: NIKON CORPORATION
    Inventor: Mariko HIROKAWA
  • Patent number: 11419495
    Abstract: An image processing method, which is executed by a processor, comprises acquiring choroid information from an image of a fundus of an examined eye, and comparing the choroid information against a choroid normative database and determining whether or not there is an abnormality in the fundus.
    Type: Grant
    Filed: October 30, 2019
    Date of Patent: August 23, 2022
    Assignee: NIKON CORPORATION
    Inventors: Mariko Hirokawa, Yasushi Tanabe, Tomoharu Fujiwara
  • Publication number: 20220230307
    Abstract: An image processing method includes acquiring a first direction fundus image imaged in a state in which an examined eye is directed in a first direction, and a second direction fundus image imaged in a state in which the examined eye is directed in a second direction different to the first direction, generating a combined image for analyzing a fundus-peripheral portion of the examined eye by combining the first direction fundus image and the second direction fundus image, and outputting the combined image.
    Type: Application
    Filed: May 31, 2019
    Publication date: July 21, 2022
    Applicant: NIKON CORPORATION
    Inventors: Mariko HIROKAWA, Yasushi TANABE
  • Publication number: 20220076412
    Abstract: A non perfusion area is detected from a fundus image. A fundus image is acquired, a first non perfusion area in a first region of the fundus is extracted from the fundus image, and a second non perfusion area in a second region of the fundus is extracted from the fundus image.
    Type: Application
    Filed: December 28, 2018
    Publication date: March 10, 2022
    Applicant: NIKON CORPORATION
    Inventors: Mariko HIROKAWA, Yasushi TANABE
  • Publication number: 20210407087
    Abstract: An image processing method, which is executed by a processor, comprises acquiring a choroidal vascular image, identifying, in the choroidal vascular image, a plurality of blood vessel center points of a choroidal blood vessel along a flow direction of the choroidal blood vessel, and computing a blood vessel diameter for each of the plurality of identified blood vessel center points.
    Type: Application
    Filed: September 14, 2021
    Publication date: December 30, 2021
    Applicant: NIKON CORPORATION
    Inventor: Mariko HIROKAWA
  • Patent number: 11170213
    Abstract: There is provided an ocular image capturing device comprising an ocular image generating module operable to generate an image of a subject's eye based on light reflected from the eye, and a determination module arranged to determine whether or not at least a portion of a pupil region of the generated image is within a predetermined permissible region within the generated image, and to generate a signal that is indicative of the determination, the pupil region being an image of at least a portion of the pupil of the eye.
    Type: Grant
    Filed: October 10, 2017
    Date of Patent: November 9, 2021
    Assignee: OPTOS PLC
    Inventors: Alan Anderson, Praveen Ashok, Tomoharu Fujiwara, Yasushi Tanabe, Hiroshi Kintou, Mariko Hirokawa, Tadashi Umezaki
  • Patent number: 11151718
    Abstract: An image processing method, which is executed by a processor, comprises acquiring a choroidal vascular image, identifying, in the choroidal vascular image, a plurality of blood vessel center points of a choroidal blood vessel along a flow direction of the choroidal blood vessel, and computing a blood vessel diameter for each of the plurality of identified blood vessel center points.
    Type: Grant
    Filed: October 30, 2019
    Date of Patent: October 19, 2021
    Assignee: NIKON CORPORATION
    Inventor: Mariko Hirokawa
  • Publication number: 20210127970
    Abstract: An image processing method, which is executed by a processor, comprises acquiring choroid information from an image of a fundus of an examined eye, and comparing the choroid information against a choroid normative database and determining whether or not there is an abnormality in the fundus.
    Type: Application
    Filed: October 30, 2019
    Publication date: May 6, 2021
    Applicant: NIKON CORPORATION
    Inventors: Mariko HIROKAWA, Yasushi TANABE, Tomoharu FUJIWARA
  • Publication number: 20210128079
    Abstract: An image display method executed by a processor comprises displaying a screen including a two-dimensional fundus image of an examined eye and a three-dimensional eyeball image of the examined eye, finding a second region in the three-dimensional eyeball image that corresponds to a first region specified in the two-dimensional fundus image, and displaying a mark indicating the second region in the three-dimensional eyeball image.
    Type: Application
    Filed: October 30, 2019
    Publication date: May 6, 2021
    Applicant: NIKON CORPORATION
    Inventor: Mariko HIROKAWA
  • Publication number: 20210133955
    Abstract: An image processing method, which is executed by a processor, comprises acquiring a choroidal vascular image, identifying, in the choroidal vascular image, a plurality of blood vessel center points of a choroidal blood vessel along a flow direction of the choroidal blood vessel, and computing a blood vessel diameter for each of the plurality of identified blood vessel center points.
    Type: Application
    Filed: October 30, 2019
    Publication date: May 6, 2021
    Applicant: NIKON CORPORATION
    Inventor: Mariko HIROKAWA
  • Publication number: 20210030267
    Abstract: An image is created to visualize the efficacy of treatment to a fundus. An image processing method includes extracting a first frame from a first moving image of an examined eye and extracting a second frame from a second moving image of the examined eye, and comparing the first frame against the second frame.
    Type: Application
    Filed: October 16, 2020
    Publication date: February 4, 2021
    Applicant: NIKON CORPORATION
    Inventors: Mariko HIROKAWA, Yasushi TANABE
  • Publication number: 20210035294
    Abstract: A feature value related to a positional relationship between a vortex vein position and a characteristic point on a fundus image is computed. The image processing method provided includes a step of analyzing a choroidal vascular image and estimating a vortex vein position, and a step of computing a feature value indicating a positional relationship between the vortex vein position and a position of a particular site on a fundus.
    Type: Application
    Filed: October 16, 2020
    Publication date: February 4, 2021
    Applicant: NIKON CORPORATION
    Inventors: Yasushi TANABE, Mariko HIROKAWA
  • Publication number: 20210030266
    Abstract: Data is computed in order to visualize the velocity of blood fluid flowing through a blood vessel at a fundus. An image processing method includes a step of performing registration of each frame in a moving image configured by plural frames of an imaged fundus, and a step of computing visualization data enabling visualization of a state of blood fluid flowing through a blood vessel at the fundus based on a pixel value in each of the registered frames.
    Type: Application
    Filed: October 16, 2020
    Publication date: February 4, 2021
    Applicant: NIKON CORPORATION
    Inventors: Mariko HIROKAWA, Yasushi TANABE
  • Publication number: 20210027476
    Abstract: A first image is projective transformed into a reference image by using a projective transformation matrix on each pixel of the first image. A projective transformation matrix for transforming a tilted image n into a central image G0 is computed based on positions of combinations of twelve corresponding points indicated in a combination of the central image G0 with the tilted image n. The computed projective transformation matrix is then employed to perform a projective transformation of the tilted image n. A projective-transformed tilted image n1 is created thereby.
    Type: Application
    Filed: October 15, 2020
    Publication date: January 28, 2021
    Applicant: NIKON CORPORATION
    Inventors: Mariko HIROKAWA, Yasushi TANABE
  • Publication number: 20210022606
    Abstract: In the present invention, vortex vein positions are detected from a fundus image. The image processing method comprising: a step in which a choroidal blood vessel structure is analyzed from a fundus image; and a step in which vortex vein positions are detected based on the choroidal blood vessel structure.
    Type: Application
    Filed: October 15, 2020
    Publication date: January 28, 2021
    Applicant: NIKON CORPORATION
    Inventors: Yasushi TANABE, Mariko HIROKAWA
  • Publication number: 20210027467
    Abstract: An image processing method is provided. The image processing method includes: setting a first analysis point and a second analysis point on a fundus image so as to be symmetrical about a reference line; finding a first blood vessel running direction at the first analysis point and finding a second blood vessel running direction at the second analysis point; and comparing the first blood vessel running direction against the second blood vessel running direction.
    Type: Application
    Filed: October 15, 2020
    Publication date: January 28, 2021
    Applicant: NIKON CORPORATION
    Inventor: Mariko HIROKAWA
  • Publication number: 20210004939
    Abstract: An image processing method comprising acquiring a first fundus image obtained by photographing a fundus using first light having a first wavelength, and a second fundus image obtained by photographing the fundus using second light having a second wavelength that is shorter than the first wavelength; specifying, in the first fundus image, respective positions of retinal blood vessels appearing in the second fundus image; and generating a choroidal blood vessel image by processing the positions identified in the first fundus image.
    Type: Application
    Filed: September 18, 2020
    Publication date: January 7, 2021
    Applicant: NIKON CORPORATION
    Inventor: Mariko HIROKAWA
  • Publication number: 20200359888
    Abstract: Predicting a non perfusion area. An enhancement image processing section performs enhancement image processing on a fundus image of a subject eye to enhance vascular portions (304). A prediction processing section predicts a non perfusion area in the fundus image that has been subjected to the enhancement image processing (306 to 312). A generation section generates a non perfusion area candidate image (314).
    Type: Application
    Filed: December 28, 2017
    Publication date: November 19, 2020
    Applicant: NIKON CORPORATION
    Inventors: Mariko HIROKAWA, Yasushi TANABE, Tomoharu FUJIWARA
  • Publication number: 20200258295
    Abstract: An image signal output method including outputting a first image signal to display an eyeball model selection screen for selecting one eyeball model from out of plural eyeball models of different types, converting a two-dimensional fundus image of the subject eye so as to generate a three-dimensional fundus image based on a selected eyeball model, and outputting a second image signal to display a fundus image display screen including the three-dimensional fundus image.
    Type: Application
    Filed: October 11, 2018
    Publication date: August 13, 2020
    Applicant: NIKON CORPORATION
    Inventor: Mariko HIROKAWA
  • Publication number: 20200237208
    Abstract: An image signal output device including an acquisition section configured to acquire a fundus image, a selection section configured to select a projection for displaying the acquired fundus image from plural projections, a conversion section configured to convert the fundus image into the selected projection, and a processing section configured to output an image signal of the converted fundus image.
    Type: Application
    Filed: July 30, 2018
    Publication date: July 30, 2020
    Applicant: NIKON CORPORATION
    Inventors: Yasushi TANABE, Tomoharu FUJIWARA, Mariko HIROKAWA