Patents by Inventor Keiichiro Ishihara

Keiichiro Ishihara 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: 20150341560
    Abstract: To reduce the difference among a plurality of images acquired due to an object shake or hand shake. An image capturing apparatus 10 includes an imaging optical system 11 and an image sensor 14 that acquires an image of light coming from the imaging optical system 11. The imaging optical system 11 has an aperture stop 12 including a first aperture and a second aperture. The image sensor 11 has first pixels and second pixels. The central axis of the first aperture and the central axis of the second aperture are aligned with each other. The first aperture has a first optical filter that codes light passing therethrough with a first code. The first pixels receive first coded light coded with the first code. The second pixels do not receive the first coded light and receive light other than the first coded light.
    Type: Application
    Filed: December 19, 2013
    Publication date: November 26, 2015
    Inventor: Keiichiro Ishihara
  • Publication number: 20150309285
    Abstract: Provided is an imaging apparatus, including: an imaging optical system including a plurality of lenses; and an image plane which is disposed on an image side of the imaging optical system and is curved so that a concave surface thereof faces an object side of the imaging optical system. The imaging optical system includes an aperture stop. In the imaging optical system, a lens closer to the object side than the aperture stop and a lens closer to the image side than the aperture stop have different positive powers. A focal length of the imaging optical system is substantially equal to a distance from an exit pupil of the imaging optical system to the image plane. A radius of curvature of the image plane is substantially equal to the focal length of the imaging optical system.
    Type: Application
    Filed: July 6, 2015
    Publication date: October 29, 2015
    Inventor: Keiichiro Ishihara
  • Publication number: 20150235103
    Abstract: A distance measurement apparatus having: a setting unit configured to set a first local region in a first image including a target pixel, and a second local region in a second image corresponding to the first local region; an extraction unit configured to extract a plurality of shift regions; a first calculation unit configured to calculate a correlation value between the first local region and each of the plurality of shift regions; a decision unit configured to determine a correlation value used for calculating the distance information, based on the plurality of correlation values calculated by the first calculation unit; and a second calculation unit configured to calculate the distance information on the distance calculation target pixel, based on the correlation value determined by the first decision unit.
    Type: Application
    Filed: February 10, 2015
    Publication date: August 20, 2015
    Inventors: Satoru Komatsu, Keiichiro Ishihara
  • Patent number: 9104018
    Abstract: Provided is an imaging apparatus, including: an imaging optical system including a plurality of lenses; and an image plane which is disposed on an image side of the imaging optical system and is curved so that a concave surface thereof faces an object side of the imaging optical system. The imaging optical system includes an aperture stop. In the imaging optical system, a lens closer to the object side than the aperture stop and a lens closer to the image side than the aperture stop have different positive powers. A focal length of the imaging optical system is substantially equal to a distance from an exit pupil of the imaging optical system to the image plane. A radius of curvature of the image plane is substantially equal to the focal length of the imaging optical system.
    Type: Grant
    Filed: March 11, 2013
    Date of Patent: August 11, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: Keiichiro Ishihara
  • Publication number: 20150092992
    Abstract: An image processing device obtains a depth information image representing a distribution of depth information about an object on the basis of first and second images that have different degrees of blurring and that are captured by an image sensor including groups each including pixels that obtain different color information about the object. The image processing device includes an extracting unit configured to extract signals, each corresponding to one of the pixels of each group, from the groups and generate first and second extracted images respectively corresponding to the first and second images, and a calculating unit configured to calculate the depth information image from a difference in degree of blurring between the first and second extracted images. The signals each corresponding to one of the pixels of each group and extracted from the groups are signals corresponding to pixels that obtain the same color information.
    Type: Application
    Filed: September 30, 2014
    Publication date: April 2, 2015
    Inventor: Keiichiro Ishihara
  • Publication number: 20150092091
    Abstract: A processing device which obtains distance information of a subject, including: a calculation unit configured to calculate the distance information of the subject from a difference in blur degree of a plurality of images photographed by an imaging optical system; a correcting unit configured to correct the distance information using correction data in accordance with an image height in the imaging optical system; and an extraction unit configured to extract at least one frequency component from each of the plurality of images, wherein the calculation unit calculates the distance information from a difference in blur degree in the plurality of images in the at least one frequency component; and the correcting unit corrects the distance information using correction data in accordance with an image height in the at least one frequency component.
    Type: Application
    Filed: September 29, 2014
    Publication date: April 2, 2015
    Inventor: Keiichiro Ishihara
  • Publication number: 20150062399
    Abstract: An imaging apparatus, comprises an imaging optical system; a birefringent optical unit configured to separate a ray into an ordinary ray and an extraordinary ray; a light selection unit constituted by an ordinary ray selection element and an extraordinary ray selection element; an image sensor constituted by a first pixel group that receives an extraordinary ray, and a second pixel group that receives an ordinary ray; an image generation unit configured to generate an ordinary ray image based on signals acquired from pixels belonging to the first pixel group, and generate an extraordinary ray image based on signals acquired from pixels belonging to the second pixel group; and an image processing unit configured to calculate a subject distance, using the ordinary ray image and the extraordinary ray image.
    Type: Application
    Filed: August 12, 2014
    Publication date: March 5, 2015
    Inventor: Keiichiro Ishihara
  • Publication number: 20150042839
    Abstract: A distance measuring apparatus that calculates an subject distance from a plurality of images having different degrees of a blur, comprises an area setting unit configured to set ranging target areas in corresponding coordinate positions in the plurality of images, respectively; a feature value calculating unit configured to calculate, for each of the ranging target areas set in the plurality of images, a feature value of the ranging target area; and a distance calculating unit configured to calculate an subject distance in the ranging target area based on a plurality of feature values calculated for the ranging target areas.
    Type: Application
    Filed: August 5, 2014
    Publication date: February 12, 2015
    Inventors: Satoru Komatsu, Keiichiro Ishihara
  • Publication number: 20150043808
    Abstract: An image processing apparatus comprising: an image acquisition unit configured to acquire an image; a depth map acquisition unit configured to acquire a depth map corresponding to the image; a refinement unit configured to detect a saliency region from the image and to refine the depth map on the basis of the saliency region, the saliency region being a region on which a person tends to focus; and an image processing unit configured to apply image processing to the image using the depth map refined by the refinement unit.
    Type: Application
    Filed: July 28, 2014
    Publication date: February 12, 2015
    Inventors: Takahiro Takahashi, Keiichiro Ishihara, Satoru Komatsu, Shin Tanaka
  • Publication number: 20150043783
    Abstract: A depth calculation device for calculating depth information on an object from captured first image and second image with different blur, the depth calculation device comprising: an extraction unit configured to extract a first frequency component and a second frequency component from each of the first image and the second image, the first frequency component being a component of a first frequency band, the second frequency component being a component of a second frequency band, the second frequency band being lower than the first frequency band; and a depth calculation unit configured to calculate the depth information from the frequency components extracted by the extraction unit.
    Type: Application
    Filed: July 30, 2014
    Publication date: February 12, 2015
    Inventor: Keiichiro Ishihara
  • Patent number: 8837053
    Abstract: A zoom lens includes an aperture diaphragm, and a plurality of lens units including a negative lens unit arranged on a light incident side of the aperture diaphragm, the zoom lens being configured to make variable a focal length by changing an interval in the plurality of lens units. The negative lens unit includes a negative lens having a radial type refractive index distribution and a concave surface on the light incident side. The negative lens has a wavelength dispersion distribution in which a differential value is negative on an optical axis of the zoom lens, and the differential value increases at a position that is more distant from the optical axis.
    Type: Grant
    Filed: August 30, 2012
    Date of Patent: September 16, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Keiichiro Ishihara, Masakazu Tohara
  • Publication number: 20140125634
    Abstract: Disclosed herein is an information processing apparatus, including: an image acceptance section configured to accept an image of an operation inputting apparatus picked up by an imaging section; an operation signal acceptance section configured to accept an operation signal representative of an operation for the operation inputting apparatus from the operation inputting apparatus; and a process execution section configured to execute a process in response to the position of the operation inputting apparatus in the image accepted by the image acceptance section and the operation signal accepted by the operation signal acceptance section.
    Type: Application
    Filed: October 29, 2013
    Publication date: May 8, 2014
    Applicant: Sony Computer Entertainment Inc.
    Inventors: Yutaka Yokokawa, Nicolas Doucet, Keiichiro Ishihara
  • Publication number: 20140055577
    Abstract: A depth information acquisition apparatus acquiring depth information of a subject by using two real space images having different blur which are obtained by capturing a subject with different imaging parameters, comprises a conversion unit converting the two real space images to two frequency space images; a generation unit generating a frequency space phase image by dividing each frequency ingredient by the amplitude of each frequency ingredient of the frequency space images in two frequency space images; a calculation unit calculating frequency space correlation value information representing a correlation value for each frequency between the two frequency space phase images; a reverse conversion unit converting the frequency space correlation value information into real space correlation value information; and an acquisition unit acquiring the depth information, on the basis of characteristics of a peak of the real space correlation value information.
    Type: Application
    Filed: August 14, 2013
    Publication date: February 27, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Keiichiro Ishihara
  • Patent number: 8593741
    Abstract: An optical system includes a positive lens unit, wherein the positive lens unit includes an optical element containing a base material and minute particles that are mixed with the base material and have Abbe number that is lower than that of the base material, and the minute particles are higher in density at a peripheral portion of the optical element than on an optical axis of the optical element.
    Type: Grant
    Filed: April 8, 2010
    Date of Patent: November 26, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventor: Keiichiro Ishihara
  • Publication number: 20130258490
    Abstract: Provided is an imaging apparatus, including: an imaging optical system including a plurality of lenses; and an image plane which is disposed on an image side of the imaging optical system and is curved so that a concave surface thereof faces an object side of the imaging optical system. The imaging optical system includes an aperture stop. In the imaging optical system, a lens closer to the object side than the aperture stop and a lens closer to the image side than the aperture stop have different positive powers. A focal length of the imaging optical system is substantially equal to a distance from an exit pupil of the imaging optical system to the image plane. A radius of curvature of the image plane is substantially equal to the focal length of the imaging optical system.
    Type: Application
    Filed: March 11, 2013
    Publication date: October 3, 2013
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Keiichiro Ishihara
  • Patent number: 8456460
    Abstract: The present invention provides a sensor element including two diode elements connected in series to each other, and a capacitive element having one end connected to a junction point between the two diode elements. Each of the diode elements includes a semiconductor layer having a p-type semiconductor region and an n-type semiconductor region facing each other in an in-plane direction, an anode electrode connected to the p-type semiconductor region, a cathode electrode connected to the n-type semiconductor region, a gate insulting film adjoining the semiconductor layer in a stacking direction, and a gate electrode facing the semiconductor layer with the gate insulating film in between.
    Type: Grant
    Filed: September 18, 2009
    Date of Patent: June 4, 2013
    Assignee: Japan Display West, Inc.
    Inventors: Tsutomu Tanaka, Makoto Takatoku, Michiru Senda, Keiichiro Ishihara
  • Patent number: 8441457
    Abstract: A sensor device includes: one or more sensor elements each including first and second diode elements connected in series and a sensor driving section. The cathode of the second diode element is connected to the anode of the first diode element. The sensor driving section controls on-off state of the first diode element through changing a gate voltage under a fixed cathode voltage, and controls on-off state of the second diode element through changing a gate voltage under a fixed anode voltage. The sensor driving section drives the second diode element, maintaining a relationship of Vg2(off)<Vp2<Vg2(on), and, in off-to-on transition of the second diode element, overdrives the second diode element through temporarily applying a gate voltage Vg2(od) to the gate electrode, maintaining a relationship of Vg2(on)<Vg2(od). Vp2, Vg2(on) and Vg2(off) are the anode voltage, a on-state gate voltage and a off-state gate voltage of the second diode element, respectively.
    Type: Grant
    Filed: August 6, 2010
    Date of Patent: May 14, 2013
    Assignee: Sony Corporation
    Inventors: Keiichiro Ishihara, Michiru Senda, Makoto Watanabe, Masanobu Ikeda, Yoshikazu Sasaki
  • Patent number: 8418516
    Abstract: To obtain a positioning reference portion with good processing accuracy, which is formed of a newly-formed surface, a blank is press-molded by an upper mold, whereby a vertex portion abuts on an inner wall portion of a lower mold. In such a way, an oxide film that covers the vertex portion is broken by an internal pressure of the blank, and a raw material without oxide is moved by viscous flow from an inside thereof as illustrated by arrows. The raw material without oxide moved by viscous flow is thrust against the inner wall portion of the lower mold, whereby a newly-formed surface is formed, and this newly-formed surface serves as a positioning reference portion of an optical element. The newly-formed surface has surface roughness of the inner wall portion of the lower mold transferred thereto, and the positioning reference portion having good roughness is formed.
    Type: Grant
    Filed: May 18, 2009
    Date of Patent: April 16, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takashi Urakawa, Keiichiro Ishihara
  • Publication number: 20130064456
    Abstract: An object control device includes an object of interest specifying unit configured to specify an object of interest to obtain position information on the object of interest, an obstacle determining unit configured to determine whether there is an obstacle between the object of interest and the object, and a time measuring unit configured to measure a period after determining that there is the obstacle, and a holding unit configured to hold position information of the object of interest when the period reaches a predetermined period, and an object action control unit configured to control a direction of a part of the object, based on the position information obtained by the object of interest specifying unit before the period reaches the predetermined period, and based on the position information on the object of interest held in the holding unit after the period reaches the predetermined period.
    Type: Application
    Filed: September 11, 2012
    Publication date: March 14, 2013
    Applicant: Sony Computer Entertainment Inc.
    Inventors: Masashi Kudo, Fumito Ueda, Keiichiro Ishihara, Takahisa Suzuki, Yui Sasajima, Junichi Hosono, Takeshi Nakagawa
  • Publication number: 20130057962
    Abstract: A zoom lens includes an aperture diaphragm, and a plurality of lens units including a negative lens unit arranged on a light incident side of the aperture diaphragm, the zoom lens being configured to make variable a focal length by changing an interval in the plurality of lens units. The negative lens unit includes a negative lens having a radial type refractive index distribution and a concave surface on the light incident side. The negative lens has a wavelength dispersion distribution in which a differential value is negative on an optical axis of the zoom lens, and the differential value increases at a position that is more distant from the optical axis.
    Type: Application
    Filed: August 30, 2012
    Publication date: March 7, 2013
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Keiichiro ISHIHARA, Masakazu TOHARA