Patents by Inventor Takafumi Koike

Takafumi Koike 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: 9589344
    Abstract: A controller has a function that: poygonizes and converts three-dimensional volume data, which is generated by a modality, into polygon data; divides this polygon data into a plurality of clusters; calculates an L2 norm vector of spherical harmonics as a feature vector with respect to each of the clusters based on the polygon data constituting each cluster; identifies whether each cluster is a target or not, based on each calculated feature vector and learning data; and displays an image of a cluster identified as the target at least on a screen.
    Type: Grant
    Filed: December 28, 2012
    Date of Patent: March 7, 2017
    Assignee: Hitachi, Ltd.
    Inventors: Takuma Shibahara, Takafumi Koike
  • Publication number: 20160287203
    Abstract: Provided are a CT-image processing apparatus and a method which can remove noise caused by one of a heartbeat and a breathing beat and extract only an accurate periodic motion by the other one. A CT-image processing apparatus 5 that processes projection data in which an animal is captured as a subject at each time by an X-ray CT apparatus includes a breathing beat threshold specification unit 36a to specify a lower limit of a breathing beat frequency from a feature amount waveform within a ROI for breathing beat synchronization in a series of projection data, a heartbeat threshold specification unit 37a to specify a lower limit of a heartbeat frequency from a feature amount waveform within a ROI for heartbeat synchronization in the series of projection data, a breathing beat extraction unit 36b to extract a breathing beat waveform using a band-pass filter defined by the lower limit of the breathing beat frequency and the lower limit of the heartbeat frequency.
    Type: Application
    Filed: March 15, 2016
    Publication date: October 6, 2016
    Applicant: Rigaku Corporation
    Inventors: Takafumi KOIKE, Minoru MAESAWA, Yukihiro HARA
  • Publication number: 20160261476
    Abstract: This server for distributing messages quickly detects a performance decline in a downstream server by using a method for keeping, for each distribution-destination server, a threshold such as a connection number and a time interval separate from a response timeout, and determining that performance has declined when the threshold is exceeded. In addition, the present invention improves system availability by identifying a server group in which performance has declined on the basis of a correlation pertaining to inter-server cooperative processing, when a distribution server exhibits a decline in performance, and by the distribution server distributing a message to a server not exhibiting a decline in performance.
    Type: Application
    Filed: April 14, 2014
    Publication date: September 8, 2016
    Applicant: HITACHI, LTD.
    Inventors: Masafumi KINOSHITA, Takafumi KOIKE, Izumi MIZUTANI, Naoki HARAGUCHI
  • Publication number: 20160234129
    Abstract: Provided is a communication system capable of sending and receiving signals. The communication system includes a plurality of data store servers each including a queue capable of storing signals and a queue management server capable of allocating signals to the plurality of data store servers. The queue management server holds distribution policy information that specifies policies to allocate signals to the plurality of data store servers. The queue management server is configured to determine to allocate a plurality of received signals to one queue in one of the plurality of data store servers based on the distribution policy information when the plurality of signals include in-order guarantee keys indicating that the plurality of signals are in need of in-order guarantee and the in-order guarantee keys of the plurality of signals are identical.
    Type: Application
    Filed: February 1, 2016
    Publication date: August 11, 2016
    Applicant: HITACHI, LTD.
    Inventors: Hiroaki KONOURA, Masafumi KINOSHITA, Takafumi KOIKE, Toshiyuki KAMIYA
  • Publication number: 20160055639
    Abstract: There are provided an image processing apparatus, an image processing method and an image processing program which can easily and accurately specify and analyze an abnormal part of a subject. An image processing apparatus 100 used to specify the abnormal part of the subject includes a calculation unit 130 calculating position adjustment data between contour data of a specific subject extracted from an X-ray radiographic image and contour data of a photographic image obtained by photographing the specific subject, a sectional image generation unit 140 generating a sectional image of a three-dimensional X-ray CT image correlated with the X-ray radiographic image on a plane parallel with a light receiving face of a two-dimensional biolight image correlated with the photographic image, and a display processing unit 150 displaying the three-dimensional X-ray CT image and the two-dimensional biolight image in superposition on the sectional image, using the calculated position adjustment data.
    Type: Application
    Filed: August 10, 2015
    Publication date: February 25, 2016
    Applicant: RIGAKU CORPORATION
    Inventors: Yukihiro HARA, Takafumi KOIKE, Minoru MAESAWA
  • Patent number: 9252974
    Abstract: In a mail gateway, a collection part collects, for each specific information contained in a mail entered into a resending queue, statistical information of the specific information. A provisional queue creation part creates a provisional queue based on the collected number of the statistical information. The provisional queue handles a mail which has a possibility of causing congestion. This can prevent a normal queue from entering into a congestion state. Also in the mail gateway, if the congestion state is brought about in the provisional queue which performs a send of a mail containing the specific information, a mail sort part restricts an entry of a mail into the provisional queue. This can limit an influence of the congestion state only to the provisional queue.
    Type: Grant
    Filed: January 21, 2013
    Date of Patent: February 2, 2016
    Assignee: HITACHI, LTD.
    Inventors: Masafumi Kinoshita, Toshiyuki Kamiya, Takafumi Koike
  • Publication number: 20160005167
    Abstract: A controller has a function that: poygonizes and converts three-dimensional volume data, which is generated by a modality, into polygon data; divides this polygon data into a plurality of clusters; calculates an L2 norm vector of spherical harmonics as a feature vector with respect to each of the clusters based on the polygon data constituting each cluster; identifies whether each cluster is a target or not, based on each calculated feature vector and learning data; and displays an image of a cluster identified as the target at least on a screen.
    Type: Application
    Filed: December 28, 2012
    Publication date: January 7, 2016
    Applicant: Hitachi, Ltd.
    Inventors: Takuma SHIBAHARA, Takafumi KOIKE
  • Publication number: 20150379758
    Abstract: This is comprising: a volume rendering unit for generating a two-dimensional rendered image by converting three-dimensional volume data into two-dimensional volume data; a depth information generator for generating depth information indicative of the length from a virtual view position in a virtual three-dimensional space to the three-dimensional volume data on the basis of the three-dimensional volume data; an anti-aliasing unit for identifying a target in the rendered image based on the depth information and executing anti-aliasing processing on an edge portion of the identified target; and a display unit for displaying an image including the target, on which the anti-aliasing processing has been executed, as a rendered image.
    Type: Application
    Filed: December 28, 2012
    Publication date: December 31, 2015
    Applicant: Hitachi, Ltd.
    Inventors: Takafumi KOIKE, Takuma SHIBAHARA
  • Patent number: 8781200
    Abstract: A CT image processing device 5 which processes projection data in synchronization with a periodic motion of a portion of a subject includes an ROI calculation unit 36 which calculates specific information on an ROI for synchronization for each scanning angle so as to track the target portion of the subject. As a result, a strong synchronization signal is obtained, a characteristic amount in which breathing beat and heartbeat sufficiently appear can be measured, and simple synchronization processing is made possible by using the projection data. A dedicated device for obtaining the heartbeat or breathing beat such as ECG and a respiratory measuring device is not required, and a heartbeat signal and a breathing beat signal can be obtained from an ROI signal of the projection data. As a result, blurring on an image caused by the heartbeat can be eliminated, and an image quality is extremely improved.
    Type: Grant
    Filed: March 13, 2012
    Date of Patent: July 15, 2014
    Assignee: Rigaku Corporation
    Inventors: Yukihiro Hara, Takafumi Koike
  • Patent number: 8621013
    Abstract: To solve the problem with mobile phone carriers that increasing mail traffic increases storage capacity of a mail server and network load, a relay server which relays a mail transfer (SMTP communication) and a mail fetch (IMAP communication) is installed in a carrier facility network. The relay server compresses a mail including a header transferred from a mail transfer server, adds a new header to encapsulate the mail, and transmits the encapsulated mail to an IMAP server as a compressed mail. In response to a mail fetch request from a communication terminal, the relay server decapsulates and restores the compressed mail fetched from the IMAP server, and transmits the restored mail to the communication terminal. The relay server changes parameters such as the mail size, so that no inconsistency of IMAP commands occurs in compressing/restoring the mail.
    Type: Grant
    Filed: May 25, 2010
    Date of Patent: December 31, 2013
    Assignee: Hitachi, Ltd.
    Inventors: Masafumi Kinoshita, Toshiyuki Kamiya, Takafumi Koike
  • Publication number: 20130279646
    Abstract: Provided are a three-dimensional X-ray CT apparatus, a three-dimensional CT image reconstruction method, and a program, which are capable of reducing an operating time. A three-dimensional X-ray CT apparatus includes: a CT imaging portion for continuously and relatively rotating a measurement system with respect to a subject to perform a CT imaging measurement for taking data on a plurality of transmission images for reconstructing a three-dimensional CT image of the subject; and an image reconstruction portion for reconstructing the three-dimensional CT image based on the data on the plurality of transmission images taken by the CT imaging portion and displaying the three-dimensional CT image. During a period in which the CT imaging measurement is being performed, the image reconstruction portion reconstructs the three-dimensional CT image based on already-taken data on transmission images and displays the three-dimensional CT image before the CT imaging measurement is completed.
    Type: Application
    Filed: March 18, 2013
    Publication date: October 24, 2013
    Applicant: Rigaku Corporation
    Inventors: Takafumi KOIKE, Yukihiro HARA
  • Patent number: 8401278
    Abstract: Image retargeting is appropriately performed on stereo pair images composed of at least two images such as in three-dimensional displays. A path of connected pixels in first image data is calculated based on pixel gradient energy. Each pixel in second image data corresponding to each pixel in connected pixels in the first image data is calculated as an initial search point, based on the stereo correspondence relationship between the first image data and the second image data. Pixels that minimize energy between pixels of the first image data and pixels of the second image data in the proximity of the initial search point is calculated as a path of connected pixels in the second image data. A path of optimal connected pixels in the first image data is calculated using the energy.
    Type: Grant
    Filed: July 12, 2010
    Date of Patent: March 19, 2013
    Assignee: Hitachi, Ltd.
    Inventors: Kei Utsugi, Takuma Shibahara, Takafumi Koike
  • Publication number: 20120278409
    Abstract: A mail system includes: a data store server that stores a mail transmitted to a user of a terminal device; a mailbox server that controls the storage of the mail. A storage part of the data store server has a first storage part and a second storage part. A control part of the mailbox server determines whether a mail is stored in the first storage part or in the second storage part, based on at least one of a feature of the mail, a feature of the storage part of the data store server, and setting information.
    Type: Application
    Filed: February 17, 2012
    Publication date: November 1, 2012
    Applicant: HITACHI, LTD.
    Inventors: Masafumi Kinoshita, Toshiyuki Kamiya, Takafumi Koike
  • Publication number: 20120249968
    Abstract: A light beam projected from a projector passes through a microlens and then is focused on an extremely small region (hereinafter, will be called a deflection point). After that, the light beam is diverged as a directional light beam from the region serving as the deflection point. Thus, a viewer of a stereoscopic display perceives light beams as extremely small pixels. In reality, the deflection points are largely spaced, so that a rough image is perceived by a viewer who observes a screen. An autostereoscopic display including a two-dimensional image display device and an optical element, the optical element having a structure that simultaneously diffuses and deflects light emitted from the two-dimensional image display device, so that a stereoscopic image is displayed.
    Type: Application
    Filed: November 9, 2011
    Publication date: October 4, 2012
    Applicant: HITACHI CONSUMER ELECTRONICS CO., LTD.
    Inventors: Takafumi Koike, Michio Oikawa, Masami Yamasaki
  • Publication number: 20120237099
    Abstract: A CT image processing device 5 which processes projection data in synchronization with a periodic motion of a portion of a subject includes an ROI calculation unit 36 which calculates specific information on an ROI for synchronization for each scanning angle so as to track the target portion of the subject. As a result, a strong synchronization signal is obtained, a characteristic amount in which breathing beat and heartbeat sufficiently appear can be measured, and simple synchronization processing is made possible by using the projection data. A dedicated device for obtaining the heartbeat or breathing beat such as ECG and a respiratory measuring device is not required, and a heartbeat signal and a breathing beat signal can be obtained from an ROI signal of the projection data. As a result, blurring on an image caused by the heartbeat can be eliminated, and an image quality is extremely improved.
    Type: Application
    Filed: March 13, 2012
    Publication date: September 20, 2012
    Applicant: RIGAKU CORPORATION
    Inventors: Yukihiro HARA, Takafumi KOIKE
  • Patent number: 8217990
    Abstract: An apparatus for rendering a three-dimensional model from a plurality of eye points to present a three-dimensional picture, wherein the position of a virtual camera for rendering apexes of the three-dimensional model is controlled in accordance with the amount of protrusion of an object under rendering from a display plane to create and present a non-perspective projection picture as a picture at each eye point position. Also, for this control, a weighting parameter is incorporated in each part of the three dimensional model, such that the presentation of stereoscopic sense can be finely controlled.
    Type: Grant
    Filed: April 10, 2006
    Date of Patent: July 10, 2012
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Kei Utsugi, Michio Oikawa, Takafumi Koike
  • Publication number: 20120069435
    Abstract: By installing a diffuser between a group of projectors and lenses to spread light rays from the projector group, it is possible to provide pixels with such sizes as to give perception that pixels are adjacent to each other. As a result, smooth representation of images and video display with a high stereoscopic effect are made possible.
    Type: Application
    Filed: March 24, 2011
    Publication date: March 22, 2012
    Inventors: Michio Oikawa, Masami Yamasaki, Takafumi Koike, Hideyuki Sakai, Yoshiho Seo, Hidehiro Ikeda
  • Patent number: 8115706
    Abstract: The present invention represents an object with high-quality texture. A texture image display apparatus includes: a panel display device (20) having a plurality of pixels (21); a lens array (30) having a plurality of lenses for controlling outgoing directions of light outputted from the pixels (21); a pixel data generation part (14) for generating pixel data for each pixel; and a panel driving circuit 15 for driving the panel display device (20) on the basis of the pixel data. One lens (31) is provided for a plurality of adjacent pixels (21), and directs light outputted from these adjacent pixels (21) in directions different from one another. For each pixel (21), the pixel data generation part (14) generates pixel data of different image brightness levels depending on outgoing direction of light, for the same image point in displayed content.
    Type: Grant
    Filed: March 20, 2008
    Date of Patent: February 14, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Takafumi Koike, Kei Utsugi, Michio Oikawa, Masami Yamasaki
  • Publication number: 20110038529
    Abstract: Image retargeting is appropriately performed on stereo pair images composed of at least two images such as in three-dimensional displays. A path of connected pixels in first image data is calculated based on pixel gradient energy. Each pixel in second image data corresponding to each pixel in connected pixels in the first image data is calculated as an initial search point, based on the stereo correspondence relationship between the first image data and the second image data. Pixels that minimize energy between pixels of the first image data and pixels of the second image data in the proximity of the initial search point is calculated as a path of connected pixels in the second image data. A path of optimal connected pixels in the first image data is calculated using the energy.
    Type: Application
    Filed: July 12, 2010
    Publication date: February 17, 2011
    Inventors: Kei Utsugi, Takuma Shibahara, Takafumi Koike
  • Publication number: 20110029621
    Abstract: A mail server system includes a congestion control management section managing a congestion control over the mail server system, a congestion statistical information collection section collecting the congestion statistical information of each mail server, and a resend queue having enough capacity, wherein a retry server for performing a retry process is provided. The congestion control management section detects the mail server where a fault occurs from the collected congestion statistical information and gives an instruction of regulating the sending of a mail directed to the faulty mail server to each mail server. The mail server instructed the regulating the sending of the mail directed to the faulty mail server transfers all the mails directed to that destination to the retry server, and transfers the received mail directed to the faulty mail server to the retry server until there is a regulation dissolution instruction from the congestion control management section.
    Type: Application
    Filed: May 13, 2010
    Publication date: February 3, 2011
    Inventors: Toshiyuki KAMIYA, Takafumi Koike, Toshifumi Kusume, Masafumi Kinoshita, Koji Tanaka