Patents by Inventor Akihiro Higashi

Akihiro Higashi 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: 20170032669
    Abstract: An apparatus and method for controlling traffic lights of a crossing where the traffic lights are controlled based on the jam states of the roads and according to jam levels of the roads, weights of the roads and the number of vehicles passing the crossing, which are fast in response and accurate in estimation, and the traffic lights can be quickly and efficiently controlled, thereby efficiently alleviating or solving the problem of traffic jam.
    Type: Application
    Filed: July 29, 2016
    Publication date: February 2, 2017
    Applicant: FUJITSU LIMITED
    Inventors: Jianrong WU, Zhiming TAN, Qi WANG, Akihiro HIGASHI
  • Patent number: 9558537
    Abstract: The present invention provides an image denoising method and an image denoising apparatus. The image denoising method includes performing preliminary denoising processing to an acquired image to be processed, so as to obtain a preliminarily denoised image; calculating a residual quantity corresponding to a central pixel of each unit area in the image to be processed according to numerical values of specific energy parameters to which the image to be processed and the preliminarily denoised image correspond, respectively; and using the residual quantity to calculate a weight matrix corresponding to each unit area, and performing non-local mean value calculation to the image to be processed according to the weight matrix, so as to realize the denoising processing of the image to be processed. The image denoising method is able to denoise effectively, and make a denoised image more visually natural.
    Type: Grant
    Filed: May 26, 2015
    Date of Patent: January 31, 2017
    Assignee: FUJITSU LIMITED
    Inventors: Jianrong Wu, Zhiming Tan, Akihiro Higashi
  • Patent number: 9530190
    Abstract: The present invention provides an image denoising method and an image denoising apparatus. The image denoising method includes performing preliminary denoising processing to an acquired image to be processed, so as to obtain a preliminarily denoised image; calculating a residual quantity corresponding to a central pixel of each unit area in the image to be processed according to numerical values of specific energy parameters to which the image to be processed and the preliminarily denoised image correspond, respectively; and using the residual quantity to calculate a weight matrix corresponding to each unit area, and performing non-local mean value calculation to the image to be processed according to the weight matrix, so as to realize the denoising processing of the image to be processed. The image denoising method is able to denoise effectively, and make a denoised image more visually natural.
    Type: Grant
    Filed: May 26, 2015
    Date of Patent: December 27, 2016
    Assignee: FUJITSU LIMITED
    Inventors: Jianrong Wu, Zhiming Tan, Akihiro Higashi
  • Patent number: 9443286
    Abstract: The embodiments provide an image processing method and apparatus, which combine a wavelet transform method with a non-local means method, comprising: performing N-level decomposition of an original gray image by using a wavelet transform method; and performing non-local means processing and wavelet reconstruction of each level of components one by one starting from an N-th level, so as to obtain a processed gray image. The image processing method and apparatus can effectively remove various image noises, and well reserve the image details.
    Type: Grant
    Filed: March 28, 2014
    Date of Patent: September 13, 2016
    Assignee: FUJITSU LIMITED
    Inventors: Jianrong Wu, Xuan Fu, Zheng Wang, Akihiro Higashi
  • Patent number: 9299163
    Abstract: A method and apparatus for processing a gray image, including: calculating a mean value and a standard difference of each edge pixel needing processing in an original gray image, and determining a predefined noise variance of each edge pixel according to the mean value and the standard difference; performing two-dimensional discrete cosine transform on an original gray image of a first adjacent area of each edge pixel; performing Wiener filtering on the two-dimensional discrete cosine transformed image data according to the noise variance; performing discrete cosine inverse transform on the two-dimensional Wiener filtered image data to obtain a filtered gray image of the first adjacent area; and extracting a filtered pixel value of each edge pixel from the filtered gray image of the first adjacent area, and obtaining a processed pixel value of each edge pixel by performing weighted summation on the filtered pixel value and an original pixel value.
    Type: Grant
    Filed: May 29, 2014
    Date of Patent: March 29, 2016
    Assignee: FUJITSU LIMITED
    Inventors: Jianrong Wu, Xuan Fu, Akihiro Higashi
  • Publication number: 20150339806
    Abstract: The present invention provides an image denoising method and an image denoising apparatus. The image denoising method includes performing preliminary denoising processing to an acquired image to be processed, so as to obtain a preliminarily denoised image; calculating a residual quantity corresponding to a central pixel of each unit area in the image to be processed according to numerical values of specific energy parameters to which the image to be processed and the preliminarily denoised image correspond, respectively; and using the residual quantity to calculate a weight matrix corresponding to each unit area, and performing non-local mean value calculation to the image to be processed according to the weight matrix, so as to realize the denoising processing of the image to be processed. The image denoising method is able to denoise effectively, and make a denoised image more visually natural.
    Type: Application
    Filed: May 26, 2015
    Publication date: November 26, 2015
    Applicant: FUJITSU LIMITED
    Inventors: Jianrong WU, Zhiming TAN, Akihiro HIGASHI
  • Patent number: 9167175
    Abstract: The present invention discloses a flicker detection method and a flicker detection apparatus. The method includes: calculating the mean values of selected rows of image frames to constitute a mean value vector; calculating a differential vector between the mean value vectors of a current frame and a previous frame; calculating a DC-free difference vector; building a first square wave and a second square wave, and a third square wave and a fourth square wave; calculating a first frequency reference value; calculating a second frequency reference value; and if the difference between the first and second frequency reference values is above a threshold, then it is determined that flicker is present in the current frame; otherwise, it is determined that no flicker is present.
    Type: Grant
    Filed: July 21, 2014
    Date of Patent: October 20, 2015
    Assignee: FUJITSU LIMITED
    Inventors: Jianrong Wu, Xuan Fu, Akihiro Higashi
  • Patent number: 9148583
    Abstract: The present invention discloses a flicker detection method and a flicker detection apparatus. The method includes: calculating the mean values of selected rows of image frames to constitute a mean value vector; calculating a differential vector between the mean value vectors of a current frame and a previous frame; calculating a DC-free difference vector by subtracting a direct current component from respective elements of the differential vector; calculating a power spectrum corresponding to the DC-free difference vector; obtaining a first frequency reference value; obtaining a second frequency reference value; and if the difference between the first and second frequency reference values is above a threshold, then it is determined that flicker is present in the current frame; otherwise, it is determined that no flicker is present.
    Type: Grant
    Filed: July 21, 2014
    Date of Patent: September 29, 2015
    Assignee: FUJITSU LIMITED
    Inventors: Jianrong Wu, Xuan Fu, Akihiro Higashi
  • Publication number: 20150029360
    Abstract: The present invention discloses a flicker detection method and a flicker detection apparatus. The method includes: calculating the mean values of selected rows of image frames to constitute a mean value vector; calculating a differential vector between the mean value vectors of a current frame and a previous frame; calculating a DC-free difference vector; building a first square wave and a second square wave, and a third square wave and a fourth square wave; calculating a first frequency reference value; calculating a second frequency reference value; and if the difference between the first and second frequency reference values is above a threshold, then it is determined that flicker is present in the current frame; otherwise, it is determined that no flicker is present.
    Type: Application
    Filed: July 21, 2014
    Publication date: January 29, 2015
    Applicant: Fujitsu Limited
    Inventors: Jianrong WU, Xuan FU, Akihiro HIGASHI
  • Publication number: 20150022686
    Abstract: The present invention discloses a flicker detection method and a flicker detection apparatus. The method includes: calculating the mean values of selected rows of image frames to constitute a mean value vector; calculating a differential vector between the mean value vectors of a current frame and a previous frame; calculating a DC-free difference vector by subtracting a direct current component from respective elements of the differential vector; calculating a power spectrum corresponding to the DC-free difference vector; obtaining a first frequency reference value; obtaining a second frequency reference value; and if the difference between the first and second frequency reference values is above a threshold, then it is determined that flicker is present in the current frame; otherwise, it is determined that no flicker is present.
    Type: Application
    Filed: July 21, 2014
    Publication date: January 22, 2015
    Applicant: Fujitsu Limited
    Inventors: Jianrong WU, Xuan FU, Akihiro HIGASHI
  • Publication number: 20140355877
    Abstract: A method and apparatus for processing a gray image, including: calculating a mean value and a standard difference of each edge pixel needing processing in an original gray image, and determining a predefined noise variance of each edge pixel according to the mean value and the standard difference; performing two-dimensional discrete cosine transform on an original gray image of a first adjacent area of each edge pixel; performing Wiener filtering on the two-dimensional discrete cosine transformed image data according to the noise variance; performing discrete cosine inverse transform on the two-dimensional Wiener filtered image data to obtain a filtered gray image of the first adjacent area; and extracting a filtered pixel value of each edge pixel from the filtered gray image of the first adjacent area, and obtaining a processed pixel value of each edge pixel by performing weighted summation on the filtered pixel value and an original pixel value.
    Type: Application
    Filed: May 29, 2014
    Publication date: December 4, 2014
    Applicant: FUJITSU LIMITED
    Inventors: Jianrong WU, Xuan FU, Akihiro HIGASHI
  • Publication number: 20140294318
    Abstract: The embodiments provide an image processing method and apparatus, which combine a wavelet transform method with a non-local means method, comprising: performing N-level decomposition of an original gray image by using a wavelet transform method; and performing non-local means processing and wavelet reconstruction of each level of components one by one starting from an N-th level, so as to obtain a processed gray image. The image processing method and apparatus can effectively remove various image noises, and well reserve the image details.
    Type: Application
    Filed: March 28, 2014
    Publication date: October 2, 2014
    Applicant: Fujitsu Limited
    Inventors: Jianrong Wu, Xuan Fu, Zheng Wang, Akihiro Higashi
  • Patent number: 8005120
    Abstract: A base station including a transmitting and receiving amplifier for amplifying CDMA signals exchanged with a mobile station; a radio stage connected to the transmitting and receiving amplifier for carrying out D/A conversion of a transmitted signal that undergoes baseband spreading, followed by quadrature modulation, and for carrying out quasi-coherent detection of a received signal, followed by A/D conversion; a baseband signal processor connected with the radio stage for carrying out baseband signal processing of the transmitted signal and the received signal; a transmission interface connected with the baseband signal processor for implementing interface with external channels; and a base station controller for carrying out control such as management of radio channels and establishment and release of the radio channels. The base station communicates with the external channels by mapping logical channels into physical channels. The CDMA signals are spread using a short code and a long code.
    Type: Grant
    Filed: September 29, 2003
    Date of Patent: August 23, 2011
    Assignee: NTT DoCoMo, Inc.
    Inventors: Takehiro Nakamura, Junichiro Hagiwara, Etsuhiro Nakano, Koji Ohno, Seizo Onoe, Akihiro Higashi, Motoshi Tamura, Masatomo Nakano, Hiroshi Kawakami, Hiroki Morikawa
  • Patent number: 7853367
    Abstract: In a remote engine control system, a relay device receives a vehicle equipment control request containing first identification information, updates the first identification information to second identification information, and transmits the updated vehicle equipment control request to an in-vehicle device.
    Type: Grant
    Filed: April 8, 2008
    Date of Patent: December 14, 2010
    Assignee: Fujitsu Ten Limited
    Inventor: Akihiro Higashi
  • Patent number: 7826861
    Abstract: A base station including a transmitting and receiving amplifier for amplifying CDMA signals exchanged with a mobile station; a radio stage connected to the transmitting and receiving amplifier for carrying out D/A conversion of a transmitted signal that undergoes baseband spreading, followed by quadrature modulation, and for carrying out quasi-coherent detection of a received signal, followed by A/D conversion; a baseband signal processor connected with the radio stage for carrying out baseband signal processing of the transmitted signal and the received signal; a transmission interface connected with the baseband signal processor for implementing interface with external channels; and a base station controller for carrying out control such as management of radio channels and establishment and release of the radio channels. The base station communicates with the external channels by mapping logical channels into physical channels. The CDMA signals are spread using a short code and a long code.
    Type: Grant
    Filed: September 29, 2003
    Date of Patent: November 2, 2010
    Assignee: NTT Docomo, Inc.
    Inventors: Takehiro Nakamura, Junichiro Hagiwara, Etsuhiro Nakano, Koji Ohno, Seizo Onoe, Akihiro Higashi, Motoshi Tamura, Masatomo Nakano, Hiroshi Kawakami, Hiroki Morikawa
  • Patent number: 7672357
    Abstract: A base station including a transmitting and receiving amplifier for amplifying CDMA signals exchanged with a mobile station; a radio stage connected to the transmitting and receiving amplifier for carrying out D/A conversion of a transmitted signal that undergoes baseband spreading, followed by quadrature modulation, and for carrying out quasi-coherent detection of a received signal, followed by A/D conversion; a baseband signal processor connected with the radio stage for carrying out baseband signal processing of the transmitted signal and the received signal; a transmission interface connected with the baseband signal processor for implementing interface with external channels; and a base station controller for carrying out control such as management of radio channels and establishment and release of the radio channels. The base station communicates with the external channels by mapping logical channels into physical channels. The CDMA signals are spread using a short code and a long code.
    Type: Grant
    Filed: July 11, 2006
    Date of Patent: March 2, 2010
    Assignee: NTT DoCoMo, Inc.
    Inventors: Takehiro Nakamura, Junichiro Hagiwara, Etsuhiro Nakano, Koji Ohno, Seizo Onoe, Akihiro Higashi, Motoshi Tamura, Masatomo Nakano, Hiroshi Kawakami, Hiroki Morikawa
  • Patent number: 7489663
    Abstract: A control for varying a maximum transmission power of a transmitter according to a propagation loss or a distance between the transmitter and a receiver is made possible to reduce deterioration of a user capacity to a minimum. In a wave propagation loss measurement section, a calculation is performed on the basis of an amplification factor of a reception amplifier, amplitude information and a base station transmission power information of a reception baseband signal to calculate a wave propagation loss of a reception signal, thereby estimating a propagation loss of transmission signal. The wave propagation loss information is inputted to a maximum amplification amount designation circuit to decide a maximum amplification factor. The maximum amplification amount designation circuit adjusts a maximum transmission power of the transmission signal by designating the decided maximum amplification factor to a transmission amplifier.
    Type: Grant
    Filed: September 12, 2001
    Date of Patent: February 10, 2009
    Assignee: NTT DoCoMo
    Inventors: Shinsuke Ogawa, Yukihiko Okumura, Akihiro Higashi
  • Patent number: 7443907
    Abstract: A base station including a transmitting and receiving amplifier for amplifying CDMA signals exchanged with a mobile station; a radio stage connected to the transmitting and receiving amplifier for carrying out D/A conversion of a transmitted signal that undergoes baseband spreading, followed by quadrature modulation, and for carrying out quasi-coherent detection of a received signal, followed by A/D conversion; a baseband signal processor connected with the radio stage for carrying out baseband signal processing of the transmitted signal and the received signal; a transmission interface connected with the baseband signal processor for implementing interface with external channels; and a base station controller for carrying out control such as management of radio channels and establishment and release of the radio channels. The base station communicates with the external channels by mapping logical channels into physical channels. The CDMA signals are spread using a short code and a long code.
    Type: Grant
    Filed: September 29, 2003
    Date of Patent: October 28, 2008
    Assignee: NTT DoCoMo, Inc.
    Inventors: Takehiro Nakamura, Junichiro Hagiwara, Etsuhiro Nakano, Koji Ohno, Seizo Onoe, Akihiro Higashi, Motoshi Tamura, Masatomo Nakano, Hiroshi Kawakami, Hiroki Morikawa
  • Publication number: 20080262662
    Abstract: In a remote engine control system, a relay device receives a vehicle equipment control request containing first identification information, updates the first identification information to second identification information, and transmits the updated vehicle equipment control request to an in-vehicle device.
    Type: Application
    Filed: April 8, 2008
    Publication date: October 23, 2008
    Applicant: FUJITSU TEN LIMITED
    Inventor: Akihiro Higashi
  • Patent number: 7437152
    Abstract: A control method of searching for a neighboring cell of a mobile station communicating with a base-station is provided in a direct sequence CDMA mobile communication system which transmits information by carrying out double modulation using a first spreading code group and a second spreading code. The first spreading code group includes spreading codes that have a same repetition period as an information symbol period and are used in common by the base stations, and the second spreading code has a repetition period longer than the information symbol period. The base stations are assigned different second spreading codes.
    Type: Grant
    Filed: September 18, 2003
    Date of Patent: October 14, 2008
    Assignee: NTT DoCoMo, Inc.
    Inventors: Yoshihiro Ishikawa, Seizo Onoe, Kazufumi Yunoki, Akihiro Higashi