Patents by Inventor Hiroyasu Yoshikawa

Hiroyasu Yoshikawa 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: 9473696
    Abstract: A gaze detection apparatus includes a light source which illuminates a user's eye, an imaging unit which generates an image by capturing the image of a user's face, and a processor adapted to: estimate a distance between the imaging unit and the user's face; calculate the ratio of the distance between the imaging unit and the user's face to a separation distance between the imaging unit and the light source and determine, based on the ratio, whether a bright pupil phenomenon occurs; detect from the captured image a corneal reflection image of the light source and a center of the user's pupil when determining that the bright pupil phenomenon does not occur; and detect the user's gaze direction or gaze position based on a positional relationship between the center of the user's pupil and the corneal reflection image when determining that the bright pupil phenomenon does not occur.
    Type: Grant
    Filed: July 22, 2013
    Date of Patent: October 18, 2016
    Assignee: FUJITSU LIMITED
    Inventors: Takuya Kamimura, Hiroyasu Yoshikawa
  • Patent number: 9418406
    Abstract: An information processing method includes calculating a second spatial filter having a size of the number of elements larger than a blur size of an image using a finite first spatial filter having an anisotropy in resolution of the image and a finite filter in which a value of a total sum of elements is zero and at least two elements have a non-zero value, and generating a plurality of spatial filters having a predetermined number of elements or less from the second spatial filter.
    Type: Grant
    Filed: November 18, 2013
    Date of Patent: August 16, 2016
    Assignee: FUJITSU LIMITED
    Inventors: Yukio Hirai, Hiroyasu Yoshikawa
  • Patent number: 9202264
    Abstract: An image processing apparatus includes: a processor coupled to a memory, configured to: perform an analysis of resolution in at least two directions of an image which is taken from a subject having a radial pattern, and determine filter data containing an adjusted weight coefficient which is obtained by adjusting a weight coefficient in one of the two directions, whichever has lower resolution, based on a result of the analysis of the image corrected by filtering on the image in accordance with a blurring function of the image.
    Type: Grant
    Filed: May 23, 2013
    Date of Patent: December 1, 2015
    Assignee: FUJITSU LIMITED
    Inventors: Yukio Hirai, Hiroyasu Yoshikawa
  • Patent number: 9165343
    Abstract: An image processing apparatus includes a calculation section configured to calculate filtering coefficients of a filter with a first area in an image that is partitioned into multiple first areas including the first area, the image being partitioned differently into multiple second areas, each one of which being covered by several first areas, to calculate a convoluted image of a second area using the filtering coefficients calculated with the first areas covering a part of the second area, the calculation being executed for the several first areas covering distinct parts of the second area, respectively; and an interpolation section configured to interpolate a pixel in the second area using pixels at the same position in the convoluted images of the second area which are convoluted with the respective filtering coefficients.
    Type: Grant
    Filed: September 24, 2013
    Date of Patent: October 20, 2015
    Assignee: FUJITSU LIMITED
    Inventors: Hiroyasu Yoshikawa, Yukio Hirai
  • Patent number: 9042642
    Abstract: A determining unit determines which one of a plurality of divided areas in color distribution a value of an input image single falls within. The plurality of divided areas are defined for each of R, G, and B color components, and the determining unit determines, for each color component, which one of the plurality of divided areas the value of the input image signal falls within. An image correcting unit reads correction coefficients corresponding to the determined divided area for each color component from a correction coefficient storing unit in which correction coefficients are registered for each of the color components and each of the divided areas. The image correcting unit calculates each of R, G, and B output values of an output image signal using the correction coefficients of the individual color components read from the correction coefficient storing unit.
    Type: Grant
    Filed: October 1, 2012
    Date of Patent: May 26, 2015
    Assignee: FUJITSU LIMITED
    Inventors: Nobuyuki Kanto, Masayoshi Shimizu, Hiroyasu Yoshikawa, Yukio Hirai, Takuya Kamimura
  • Patent number: 9030737
    Abstract: A 3D display device that includes: a first optical section of focal distance f1 provided with a group of small lenses arrayed along a specific direction; and a second optical section of focal distance f2 that converges N beams of parallel light that are emitted from the first optical section and hit the individual small lenses by converging so as to offset the N beams from an optical axis. A distance d1 between the first optical section and the second optical section satisfies f2?f1?d1?f2 and a viewing distance d2 from the second optical section satisfies d2?f2.
    Type: Grant
    Filed: January 22, 2013
    Date of Patent: May 12, 2015
    Assignee: Fujitsu Limited
    Inventors: Teruyuki Sato, Mineo Moribe, Takahiro Umada, Hiroyasu Yoshikawa, Takashi Itoh
  • Patent number: 9025058
    Abstract: An image processing apparatus includes an acquisition unit configured to acquire a first finite spatial filter having image resolution anisotropy, and a calculation unit configured to compute a second spatial filter by convolving a finite filter with respect to the first spatial filter, the finite filter having a sum of elements being 0 and at least two of the elements being non-0.
    Type: Grant
    Filed: April 16, 2013
    Date of Patent: May 5, 2015
    Assignee: Fujitsu Limited
    Inventors: Yukio Hirai, Hiroyasu Yoshikawa
  • Publication number: 20140285420
    Abstract: An imaging device includes: a radiation unit configured to radiate light with a peak of a specific wavelength; a light receiver configured to have first sensitivity to a first wavelength longer than the specific wavelength, the first sensitivity being lower than second sensitivity to a second wavelength shorter than the specific wavelength; and a filter configured to block the second wavelength.
    Type: Application
    Filed: December 6, 2013
    Publication date: September 25, 2014
    Applicant: FUJITSU LIMITED
    Inventors: Takuya KAMIMURA, Hiroyasu YOSHIKAWA
  • Patent number: 8810694
    Abstract: A memory unit stores as conversion information which is derived based on a correction coefficient which provides, in a predetermined allowable range from a minimum value, a sum of a norm of a difference between a color difference of a correction target color and a target color which is a target of correction of the correction target color and a correction color obtained by correcting the correction target color using the correction coefficient, and a norm of the correction coefficient to which a predetermined weight coefficient is applied. A color correcting unit converts a color of each pixel of an image captured by an image capturing unit based on the conversion information.
    Type: Grant
    Filed: October 22, 2012
    Date of Patent: August 19, 2014
    Assignee: Fujitsu Limited
    Inventors: Yukio Hirai, Masayoshi Shimizu, Hiroyasu Yoshikawa, Nobuyuki Kanto, Takuya Kamimura
  • Publication number: 20140169694
    Abstract: An image processing apparatus includes a calculation section configured to calculate filtering coefficients of a filter with a first area in an image that is partitioned into multiple first areas including the first area, the image being partitioned differently into multiple second areas, each one of which being covered by several first areas, to calculate a convoluted image of a second area using the filtering coefficients calculated with the first areas covering a part of the second area, the calculation being executed for the several first areas covering distinct parts of the second area, respectively; and an interpolation section configured to interpolate a pixel in the second area using pixels at the same position in the convoluted images of the second area which are convoluted with the respective filtering coefficients.
    Type: Application
    Filed: September 24, 2013
    Publication date: June 19, 2014
    Applicant: FUJITSU LIMITED
    Inventors: Hiroyasu YOSHIKAWA, YUKIO HIRAI
  • Publication number: 20140160325
    Abstract: An information processing method includes calculating a second spatial filter having a size of the number of elements larger than a blur size of an image using a finite first spatial filter having an anisotropy in resolution of the image and a finite filter in which a value of a total sum of elements is zero and at least two elements have a non-zero value, and generating a plurality of spatial filters having a predetermined number of elements or less from the second spatial filter.
    Type: Application
    Filed: November 18, 2013
    Publication date: June 12, 2014
    Applicant: FUJITSU LIMITED
    Inventors: Yukio HIRAI, Hiroyasu Yoshikawa
  • Publication number: 20140085451
    Abstract: A gaze detection apparatus includes a light source which illuminates a user's eye, an imaging unit which generates an image by capturing the image of a user's face, and a processor adapted to: estimate a distance between the imaging unit and the user's face; calculate the ratio of the distance between the imaging unit and the user's face to a separation distance between the imaging unit and the light source and determine, based on the ratio, whether a bright pupil phenomenon occurs; detect from the captured image a corneal reflection image of the light source and a center of the user's pupil when determining that the bright pupil phenomenon does not occur; and detect the user's gaze direction or gaze position based on a positional relationship between the center of the user's pupil and the corneal reflection image when determining that the bright pupil phenomenon does not occur.
    Type: Application
    Filed: July 22, 2013
    Publication date: March 27, 2014
    Applicant: FUJITSU LIMITED
    Inventors: Takuya KAMIMURA, Hiroyasu YOSHIKAWA
  • Publication number: 20140055342
    Abstract: A gaze detection apparatus includes: a first imaging unit which has a first angle of view and generates a first image; a second imaging unit which has a second angle of view narrower than the first angle of view, and generates a second image; a face detection unit which detects from the first image a face region; a coordinate conversion unit which identifies on the second image a first region corresponding to the face region or to an eye peripheral region containing the user's eye; a Purkinje image detection unit which detects a corneal reflection image of a light source and the center of the user's pupil from within an eye region, identified based on the first region; and a gaze detection unit which detects the user's gaze direction or gaze position based on a positional relationship between the center of the pupil and the corneal reflection image.
    Type: Application
    Filed: June 4, 2013
    Publication date: February 27, 2014
    Inventors: Takuya KAMIMURA, Hiroyasu YOSHIKAWA
  • Publication number: 20130343651
    Abstract: An image processing apparatus includes: a processor coupled to a memory, configured to: perform an analysis of resolution in at least two directions of an image which is taken from a subject having a radial pattern, and determine filter data containing an adjusted weight coefficient which is obtained by adjusting a weight coefficient in one of the two directions, whichever has lower resolution, based on a result of the analysis of the image corrected by filtering on the image in accordance with a blurring function of the image.
    Type: Application
    Filed: May 23, 2013
    Publication date: December 26, 2013
    Applicant: FUJITSU LIMITED
    Inventors: Yukio Hirai, Hiroyasu Yoshikawa
  • Publication number: 20130342709
    Abstract: An image processing apparatus includes an acquisition unit configured to acquire a first finite spatial filter having image resolution anisotropy, and a calculation unit configured to compute a second spatial filter by convolving a finite filter with respect to the first spatial filter, the finite filter having a sum of elements being 0 and at least two of the elements being non-0.
    Type: Application
    Filed: April 16, 2013
    Publication date: December 26, 2013
    Applicant: FUJITSU LIMITED
    Inventors: Yukio Hirai, Hiroyasu Yoshikawa
  • Patent number: 8575782
    Abstract: A power transmission apparatus includes: a power source; a power transmission coil that transmits electric power supplied from the power source outward as magnetic energy through magnetic resonance; a peak searching unit that searches for a drive frequency at which the magnetic energy transmitted outward has a peak; a peak split detector that detects splitting of the drive frequency at which the magnetic energy transmitted outward has a peak; a selection unit that selects a higher-frequency side frequency among split drive frequencies generated by the splitting; and a drive unit that drives the power transmission coil using the frequency selected by the selection unit.
    Type: Grant
    Filed: March 16, 2010
    Date of Patent: November 5, 2013
    Assignee: Fujitsu Limited
    Inventor: Hiroyasu Yoshikawa
  • Publication number: 20130258461
    Abstract: A 3D display device that includes: a first optical section of focal distance f1 provided with a group of small lenses arrayed along a specific direction; and a second optical section of focal distance f2 that converges N beams of parallel light that are emitted from the first optical section and hit the individual small lenses by converging so as to offset the N beams from an optical axis. A distance d1 between the first optical section and the second optical section satisfies f2?f1?d1?f2 and a viewing distance d2 from the second optical section satisfies d2?f2.
    Type: Application
    Filed: January 22, 2013
    Publication date: October 3, 2013
    Applicant: FUJITSU LIMITED
    Inventors: Teruyuki SATO, Mineo Moribe, Takahiro Umada, Hiroyasu Yoshikawa, Takashi Itoh
  • Patent number: 8542018
    Abstract: A power transmitting apparatus includes: a first magnetic resonance coil that externally transmits power as energy through magnetic resonance; a first power transmitting-and-receiving unit that supplies power to at least the first magnetic resonance coil; a second magnetic resonance coil that accepts the magnetic field energy through magnetic resonance occurring between the first magnetic resonance coil and the second magnetic resonance coil; a second power transmitting-and-receiving unit that accepts the power at least with reference to the second magnetic resonance coil; a main power supply; and a power supply-management unit configured to select either the power accepted by the second power transmitting-and-receiving unit or power transmitted from the main power supply, and transmit the selected power to the first power transmitting-and-receiving unit and/or transmit the power accepted by the second power transmitting-and-receiving unit and the power transmitted from the main power supply to the first powe
    Type: Grant
    Filed: March 15, 2010
    Date of Patent: September 24, 2013
    Assignee: Fujitsu Limited
    Inventor: Hiroyasu Yoshikawa
  • Patent number: 8378525
    Abstract: A power transfer apparatus includes: a magnetic resonance coil for transferring magnetic energy by magnetically resonating with an external coil; a power receiving unit for picking up, as electrical power, the magnetic energy that the magnetic resonance coil receives from the external coil; and a magnetic body arranged on a side of the magnetic resonance coil opposite a transfer side of the magnetic energy of the magnetic resonance coil.
    Type: Grant
    Filed: March 30, 2010
    Date of Patent: February 19, 2013
    Assignee: Fujitsu Limited
    Inventor: Hiroyasu Yoshikawa
  • Patent number: 8295142
    Abstract: Provided is an objective lens for recording a hologram that condenses an recording beam on a hologram recording medium, and the objective lens is configured so as to condense, in the case where the recording beam is incident upon the objective lens in a form of a parallel beam flux, an on-axis beam flux and an off-axis beam flux contained in the parallel flux so as to form a beam waist in the hologram recording medium, and such that a distance between an off-axis image point of the off-axis beam flux that defines a largest field angle among the off-axis beam fluxes gradually converging ahead of the beam waist and the hologram recording medium becomes minimal.
    Type: Grant
    Filed: April 20, 2010
    Date of Patent: October 23, 2012
    Assignee: Fujitsu Limited
    Inventors: Yuzuru Yamakage, Kazushi Uno, Yasumasa Iwamura, Hiroyasu Yoshikawa, Koichi Tezuka