Patents by Inventor Jun Kishiwada

Jun Kishiwada 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: 10810712
    Abstract: In an apparatus for monitoring surroundings of a vehicle based on a plurality of images captured by a plurality of imagers through a windshield of the vehicle, an image acquirer is configured to acquire the plurality of images captured by the plurality of imagers, and a distortion corrector is configured to correct the plurality of images based on an optical distortion distribution of the windshield.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: October 20, 2020
    Assignees: DENSO CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA, RICOH COMPANY, LTD.
    Inventors: Toshihiko Terada, Masaki Kuwahara, Hiroaki Ito, Naohide Uchida, Jun Kishiwada
  • Publication number: 20200300984
    Abstract: A light signal detection device includes a light receiving optical system configured to receive a reflection signal reflected from an object when irradiation light emitted from an irradiation unit hits the object and reflects from the object; and circuitry configured to binarize the received reflection signal using a first threshold value, based on a determination of whether the reflection signal is equal to or greater than the first threshold value; binarize the received reflection signal using a second threshold value set with a given value similar to a noise signal value, based on a determination of whether the reflection signal is equal to or greater than the second threshold value; and measure a time difference between a time of emitting the irradiation light from the irradiation unit and a time of receiving a reflection signal equal to or greater than the first threshold value or the second threshold value.
    Type: Application
    Filed: March 13, 2020
    Publication date: September 24, 2020
    Applicant: Ricoh Company, Ltd.
    Inventors: KAZUMA MATSUURA, YUUTA YOSHINO, TAKEFUMI TAKIZAWA, SOICHIRO YOKOTA, JUN KISHIWADA, HIROYOSHI SEKIGUCHI, TADASHI NAKAMURA
  • 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: 20190391244
    Abstract: A distance-measuring apparatus, a mobile object, a distance-measuring method, and a distance-measuring system. The distance-measuring apparatus and the distance-measuring method include performing matching for a plurality of images obtained by a plurality of imaging devices to convert the plurality of images into first distance information on a pixel-by-pixel basis, emitting a laser beam where at least one of a laser-beam resolution in a horizontal direction and a laser-beam resolution in a vertical direction exceeds two degrees, obtaining a reflected signal obtained when the laser beam is reflected by an object, detecting a peak that corresponds to reflection from the object from the reflected signal, calculating second distance information based on a length of time taken to observe the peak after the laser beam is emitted in the emitting, and integrating the first distance information and the second distance information with each other. The mobile object includes the distance-measuring apparatus.
    Type: Application
    Filed: June 17, 2019
    Publication date: December 26, 2019
    Applicant: Ricoh Company, Ltd.
    Inventors: HIROYOSHI SEKIGUCHI, JUN KISHIWADA, SOICHIRO YOKOTA, TADASHI NAKAMURA, SEIYA AMANO, KAZUMA MATSUURA
  • 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: 20190102869
    Abstract: In an apparatus for monitoring surroundings of a vehicle based on a plurality of images captured by a plurality of imagers through a windshield of the vehicle, an image acquirer is configured to acquire the plurality of images captured by the plurality of imagers, and a distortion corrector is configured to correct the plurality of images based on an optical distortion distribution of the windshield.
    Type: Application
    Filed: September 28, 2018
    Publication date: April 4, 2019
    Inventors: Toshihiko TERADA, Masaki KUWAHARA, Hiroaki ITO, Naohide UCHIDA, Jun KISHIWADA
  • 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
  • Patent number: 9863759
    Abstract: An illumination apparatus includes: a light emitting unit that outputs light; a light condensing unit that condenses the light output from the light emitting unit; a diffusion unit that diffuses the light condensed by the light condensing unit; and a uniformizing optical system that receives the light diffused by the diffusion unit, uniformizes a brightness distribution thereof compared with that of the light being received, and outputs the resulting light.
    Type: Grant
    Filed: October 9, 2015
    Date of Patent: January 9, 2018
    Assignee: RICOH COMPANY, LTD.
    Inventors: Tatsuya Takahashi, Kazuhiro Fujita, Toshiharu Murai, Takehiro Nishimori, Takahiro Kado, Jun Kishiwada
  • 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
  • Publication number: 20160316192
    Abstract: A method is for manufacturing laminated glass. The method includes: cutting a first glass and a second glass out of one sheet of glass having a corrugation formed in a predetermined direction, in such a manner that corresponding sides of the first glass and the second glass are cut in a same cutting direction; and bonding the first glass and the second glass together in such a manner that the corrugation of the first glass and the corrugation of the second glass are aligned with each other.
    Type: Application
    Filed: April 25, 2016
    Publication date: October 27, 2016
    Inventor: Jun KISHIWADA
  • Publication number: 20160109221
    Abstract: An illumination apparatus includes: a light emitting unit that outputs light; a light condensing unit that condenses the light output from the light emitting unit; a diffusion unit that diffuses the light condensed by the light condensing unit; and a uniformizing optical system that receives the light diffused by the diffusion unit, uniformizes a brightness distribution thereof compared with that of the light being received, and outputs the resulting light.
    Type: Application
    Filed: October 9, 2015
    Publication date: April 21, 2016
    Inventors: Tatsuya TAKAHASHI, Kazuhiro Fujita, Toshiharu Murai, Takehiro Nishimori, Takahiro Kado, Jun Kishiwada