Patents by Inventor Kagehiro Nagao

Kagehiro Nagao 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: 10972716
    Abstract: A calibration method calibrates a stereo camera. The calibration method includes: measuring a relative position between the stereo camera and an object that is placed so as to fall within an image capturing area of the stereo camera; acquiring a captured image that is captured by the stereo camera and includes the object; and determining a calibration parameter for calibrating the stereo camera based on the relative position and the captured image.
    Type: Grant
    Filed: March 8, 2019
    Date of Patent: April 6, 2021
    Assignee: RICOH COMPANY, LIMITED
    Inventors: Shin Aoki, Naoki Kikuchi, Kagehiro Nagao, Jun Kishiwada
  • Patent number: 10789732
    Abstract: In an apparatus for monitoring surroundings of a vehicle carrying the apparatus, a corresponding-point displacement calculator sets a search region for corresponding points in a plurality of images of an object captured simultaneously from different positions and calculate a displacement value between the corresponding points. A search region modifier modifies the search region if a number of corresponding-point displacement values acquired by the corresponding-point displacement calculator within a predetermined period of time is less than a predetermined threshold.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: September 29, 2020
    Assignees: DENSO CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA, RICOH COMPANY, LTD.
    Inventors: Toshihiko Terada, Hiroaki Ito, Naohide Uchida, Kagehiro Nagao
  • Patent number: 10713807
    Abstract: A vicinity supervising device of a vehicle includes an image capturing unit capturing a plurality of images at different locations; a distance acquiring unit acquiring a distance up to the object detected by transmitting and receiving probing waves from/to the object; a first offset calculation unit calculating a first parallax offset value based on the plurality of images and the distance up to the object; and a second offset calculation unit calculating a second parallax offset value based on a change in a parallax in a predetermined period at an identical point among the plurality of images and a travel distance of the vehicle travelling in a predetermined period; and a parallax correction unit correcting the parallax using the first parallax offset value under a condition where a difference between the first parallax offset value and the second parallax offset value is less than or equal to a threshold.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: July 14, 2020
    Assignees: DENSO CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA, RICOH COMPANY, LTD.
    Inventors: Toshihiko Terada, Hiroaki Ito, Naohide Uchida, Kagehiro Nagao
  • Patent number: 10701341
    Abstract: A calibration method is for a photographic device that photographs an object through a transparent body. The calibration method includes: acquiring a first photographic image by photographing the object without interposing the transparent body; acquiring a second photographic image by photographing the object through the transparent body; calculating an absolute positional deviation that indicates a deviation in coordinates of an image of the object due to the transparent body based on coordinates of an image of the object on the first photographic image and coordinates of an image of the object on the second photographic image; calculating a correction parameter for calibrating the absolute positional deviation; and storing the correction parameter in the photographic device.
    Type: Grant
    Filed: December 28, 2018
    Date of Patent: June 30, 2020
    Assignee: RICOH COMPANY, LTD.
    Inventors: Jun Kishiwada, Shin Aoki, Naoki Kikuchi, Kagehiro Nagao
  • Publication number: 20190208182
    Abstract: A calibration method calibrates a stereo camera. The calibration method includes: measuring a relative position between the stereo camera and an object that is placed so as to fall within an image capturing area of the stereo camera; acquiring a captured image that is captured by the stereo camera and includes the object; and determining a calibration parameter for calibrating the stereo camera based on the relative position and the captured image.
    Type: Application
    Filed: March 8, 2019
    Publication date: July 4, 2019
    Inventors: Shin Aoki, Naoki Kikuchi, Kagehiro Nagao, Jun Kishiwada
  • Publication number: 20190141313
    Abstract: A calibration method is for a photographic device that photographs an object through a transparent body. The calibration method includes: acquiring a first photographic image by photographing the object without interposing the transparent body; acquiring a second photographic image by photographing the object through the transparent body; calculating an absolute positional deviation that indicates a deviation in coordinates of an image of the object due to the transparent body based on coordinates of an image of the object on the first photographic image and coordinates of an image of the object on the second photographic image; calculating a correction parameter for calibrating the absolute positional deviation; and storing the correction parameter in the photographic device.
    Type: Application
    Filed: December 28, 2018
    Publication date: May 9, 2019
    Inventors: Jun Kishiwada, Shin Aoki, Naoki Kikuchi, Kagehiro Nagao
  • Patent number: 10277887
    Abstract: A calibration method calibrates a stereo camera. The calibration method includes: measuring a relative position between the stereo camera and an object that is placed so as to fall within an image capturing area of the stereo camera; acquiring a captured image that is captured by the stereo camera and includes the object; and determining a calibration parameter for calibrating the stereo camera based on the relative position and the captured image.
    Type: Grant
    Filed: January 28, 2015
    Date of Patent: April 30, 2019
    Assignee: RICOH COMPANY, LIMITED
    Inventors: Shin Aoki, Naoki Kikuchi, Kagehiro Nagao, Jun Kishiwada
  • Publication number: 20190102912
    Abstract: In an apparatus for monitoring surroundings of a vehicle carrying the apparatus, a corresponding-point displacement calculator sets a search region for corresponding points in a plurality of images of an object captured simultaneously from different positions and calculate a displacement value between the corresponding points. A search region modifier modifies the search region if a number of corresponding-point displacement values acquired by the corresponding-point displacement calculator within a predetermined period of time is less than a predetermined threshold.
    Type: Application
    Filed: September 28, 2018
    Publication date: April 4, 2019
    Inventors: Toshihiko TERADA, Hiroaki ITO, Naohide UCHIDA, Kagehiro NAGAO
  • Publication number: 20190102901
    Abstract: A vicinity supervising device of a vehicle includes an image capturing unit capturing a plurality of images at different locations; a distance acquiring unit acquiring a distance up to the object detected by transmitting and receiving probing waves from/to the object; a first offset calculation unit calculating a first parallax offset value based on the plurality of images and the distance up to the object; and a second offset calculation unit calculating a second parallax offset value based on a change in a parallax in a predetermined period at an identical point among the plurality of images and a travel distance of the vehicle travelling in a predetermined period; and a parallax correction unit correcting the parallax using the first parallax offset value under a condition where a difference between the first parallax offset value and the second parallax offset value is less than or equal to a threshold.
    Type: Application
    Filed: September 28, 2018
    Publication date: April 4, 2019
    Inventors: Toshihiko TERADA, Hiroaki ITO, Naohide UCHIDA, Kagehiro NAGAO
  • Patent number: 10218961
    Abstract: A calibration method is for a photographic device that photographs an object through a transparent body. The calibration method includes: acquiring a first photographic image by photographing the object without interposing the transparent body; acquiring a second photographic image by photographing the object through the transparent body; calculating an absolute positional deviation that indicates a deviation in coordinates of an image of the object due to the transparent body based on coordinates of an image of the object on the first photographic image and coordinates of an image of the object on the second photographic image; calculating a correction parameter for calibrating the absolute positional deviation; and storing the correction parameter in the photographic device.
    Type: Grant
    Filed: February 24, 2015
    Date of Patent: February 26, 2019
    Assignee: RICOH COMPANY, LIMITED
    Inventors: Jun Kishiwada, Shin Aoki, Naoki Kikuchi, Kagehiro Nagao
  • Publication number: 20170070725
    Abstract: A calibration method is for a photographic device that photographs an object through a transparent body. The calibration method includes: acquiring a first photographic image by photographing the object without interposing the transparent body; acquiring a second photographic image by photographing the object through the transparent body; calculating an absolute positional deviation that indicates a deviation in coordinates of an image of the object due to the transparent body based on coordinates of an image of the object on the first photographic image and coordinates of an image of the object on the second photographic image; calculating a correction parameter for calibrating the absolute positional deviation; and storing the correction parameter in the photographic device.
    Type: Application
    Filed: February 24, 2015
    Publication date: March 9, 2017
    Inventors: Jun KISHIWADA, Shin AOKI, Naoki KIKUCHI, Kagehiro NAGAO
  • Publication number: 20160353083
    Abstract: A calibration method calibrates a stereo camera. The calibration method includes: measuring a relative position between the stereo camera and an object that is placed so as to fall within an image capturing area of the stereo camera; acquiring a captured image that is captured by the stereo camera and includes the object; and determining a calibration parameter for calibrating the stereo camera based on the relative position and the captured image.
    Type: Application
    Filed: January 28, 2015
    Publication date: December 1, 2016
    Inventors: Shin AOKI, Naoki KIIKUCHI, Kagehiro NAGAO, Jun KISHIWADA
  • Patent number: 8340366
    Abstract: A face recognition system includes: an image input section that acquires a facial image of a user; a database in which a feature value of a part of a face of a registered person is stored; a facial position detection section that detects a position of a part of a face from the facial image of the user; a feature value extraction section that extracts a feature value of the part of the face; and a recognition section that recognizes the user by comparing the feature value of the part of the face which is extracted by the feature value extraction section with the feature value of the part of the face of the registered person stored in the database, in which the user selects the part of the face from which the feature value is extracted.
    Type: Grant
    Filed: January 19, 2007
    Date of Patent: December 25, 2012
    Assignee: Oki Electric Industry Co., Ltd.
    Inventors: Makoto Masuda, Kagehiro Nagao
  • Publication number: 20090110248
    Abstract: A face recognition system includes: an image input section that acquires a facial image of a user; a database in which a feature value of a part of a face of a registered person is stored; a facial position detection section that detects a position of a part of a face from the facial image of the user; a feature value extraction section that extracts a feature value of the part of the face; and a recognition section that recognizes the user by comparing the feature value of the part of the face which is extracted by the feature value extraction section with the feature value of the part of the face of the registered person stored in the database, in which the user selects the part of the face from which the feature value is extracted.
    Type: Application
    Filed: January 19, 2007
    Publication date: April 30, 2009
    Applicant: OKI ELECTRIC INDUSTRY CO., LTD
    Inventors: Makoto Masuda, Kagehiro Nagao
  • Publication number: 20090060293
    Abstract: A personal identification device of the present invention is provided with a registered data storage unit for storing registered data containing facial feature data for a registered user, a recognition parameter storage unit for storing recognition parameters, a image determination unit for determining whether or not the image quality of a user facial image input from an imaging device is appropriate, an adjustment unit for adjusting the settings of the imaging device or modifying the recognition parameters, in accordance with the result of determination carried out in the image determination unit, a feature extraction unit for extracting user facial feature data from a facial image, and a face recognition unit for comparing the extracted feature data with the registered data to determine whether or not the user is a registered user based on the result of comparison and the recognition parameters.
    Type: Application
    Filed: January 19, 2007
    Publication date: March 5, 2009
    Applicant: OKI ELECTRIC INDUSTRY CO., LTD.
    Inventors: Kagehiro Nagao, Ken Sugioka, Makoto Masuda, Naohiro Amamoto