Patents by Inventor Masashi Koga

Masashi Koga 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: 8359156
    Abstract: A map generation system comprising: a mobile device for acquiring location data of a vehicle and a status of the vehicle at a time of acquisition of the location; and a server for processing the acquired location data of the vehicle. The server comprises an input interface, a first storage unit, a processor and a second storage unit. The server includes a management unit for collecting a plurality of pieces of the track data obtained by a motion of the vehicle, an extraction unit for extracting feature points of the plurality of pieces of the track data on a road from which the plurality of pieces of the track data are collected to calculate a Spline curve satisfying the extracted feature points, and an update unit for adding the calculated Spline curve as a lane central line to the digital road map to update map data.
    Type: Grant
    Filed: February 5, 2008
    Date of Patent: January 22, 2013
    Assignee: Hitachi, Ltd.
    Inventors: Tao Guo, Masashi Koga
  • Publication number: 20110140919
    Abstract: A vehicle support system for supporting a man in safely crossing a road without crosswalks installed is provided.
    Type: Application
    Filed: December 9, 2010
    Publication date: June 16, 2011
    Inventors: Yoshitaka HARA, Takuya Naka, Saku Egawa, Masashi Koga
  • Publication number: 20100201509
    Abstract: A collision avoidance assisting system for a vehicle, for expecting a risk of colliding upon a moving object (or a moving obstacle), including a pedestrian, more correctly, but without annoying a driver, excessively, by estimating the risk to be excessively high, comprises a moving object detecting means for detecting a moving object existing on periphery of the vehicle; a footway boundary detecting means for detecting a position and a configuration of a footway boundary object on periphery of the vehicle; a risk estimation means for estimating a risk that the moving object detected by said moving object detecting means collides on the vehicle; and an alarm means for calling an attention to a driver of the vehicle, upon basis of the risk of collision estimated by the risk estimation means, wherein the risk of collision between the moving object, which is detected by the moving object detecting means, and that vehicle is estimated by taking at least the position information of the moving object, the position i
    Type: Application
    Filed: February 3, 2010
    Publication date: August 12, 2010
    Inventors: Yoshitaka HARA, Yuji Hosoda, Masashi Koga
  • Publication number: 20090141043
    Abstract: The mosaicing curling effect which causes a mosaic strip to curl is effectively mitigated in a system for generating a mosaic image from sequential images which partially overlap with one another. The system has a matrix estimating unit, an adjustment element calculating unit, and an image projecting unit. The matrix estimating unit estimates a transformation matrix for transformation between two adjacent images taken out from among the sequential images. The adjustment element calculating unit calculates an adjustment element of the estimated transformation matrix by decomposing the transformation matrix into a rotational component and a perspective component. The image projecting unit projects each image on the mosaic plane using the transformation matrix to which the calculated adjustment element has been applied.
    Type: Application
    Filed: December 18, 2007
    Publication date: June 4, 2009
    Inventors: Tao Guo, Masashi Koga
  • Publication number: 20080262721
    Abstract: A map generation system comprising: a mobile device for acquiring location data of a vehicle and a status of the vehicle at a time of acquisition of the location; and a server for processing the acquired location data of the vehicle. The server comprises an input interface, a first storage unit, a processor and a second storage unit. The server includes a management unit for collecting a plurality of pieces of the track data obtained by a motion of the vehicle, an extraction unit for extracting feature points of the plurality of pieces of the track data on a road from which the plurality of pieces of the track data are collected to calculate a Spline curve satisfying the extracted feature points, and an update unit for adding the calculated Spline curve as a lane central line to the digital road map to update map data.
    Type: Application
    Filed: February 5, 2008
    Publication date: October 23, 2008
    Inventors: Tao Guo, Masashi Koga
  • Patent number: 7403656
    Abstract: A character recognition method that is robust under an unknown illumination condition is provided. An apparatus for realizing such robust character recognition includes plural different binarization, means for synthesizing character sub-image candidates that have been obtained from the binarization units, and means for analyzing character sub-image candidates and for recognizing an image as a character string consisting of character sub-image candidates.
    Type: Grant
    Filed: February 4, 2005
    Date of Patent: July 22, 2008
    Assignee: Hitachi, Ltd.
    Inventor: Masashi Koga
  • Publication number: 20060039605
    Abstract: A character recognition method that is robust under an unknown illumination condition is provided. An apparatus for realizing such robust character recognition includes plural different binarization, means for synthesizing character sub-image candidates that have been obtained from the binarization units, and means for analyzing character sub-image candidates and for recognizing an image as a character string consisting of character sub-image candidates.
    Type: Application
    Filed: February 4, 2005
    Publication date: February 23, 2006
    Inventor: Masashi Koga
  • Patent number: 6912516
    Abstract: A method and a machine for generating a dictionary of address phrase expressions. One embodiment of the invention includes an apparatus for generating a dictionary of target phrases that includes an input interface for receiving as its input a first address phrase included in a list of address phrase expressions, a memory for storing a dictionary of address phrase variants, including rules for generating variants of address phrase expressions, and a processing device for generating variants of address phrases which generates a second address phrase which is different in expression from the first address phrase to output the second address phrase to a storage device holding the dictionary of target phrases, based on the input first address phrase, and the knowledge of rules about variants included in the dictionary of address phrase variants.
    Type: Grant
    Filed: November 13, 2000
    Date of Patent: June 28, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Hisashi Ikeda, Atsushi Kato, Hiromichi Fujisawa, Masashi Koga, Naohiro Furukawa
  • Patent number: 6470091
    Abstract: An address reader method and apparatus for recognizing a receiver address on a surface of mail. An image of the surface of the mail is input and segmented into at least one character string candidate. At least one address area candidate is extracted from the image based upon the segmented character string candidate. One address area candidate extracted from the image is selected as a receiver address by analyzing each address area candidate based on predetermined position information indicating a usual position of a receiver address area, character direction information indicating a character direction of a character string appropriate for the predetermined position information, and key character string information indicating a character string most likely to exist in a receiver address. Characters in character strings of the selected address area candidate are recognized as a receiver address.
    Type: Grant
    Filed: April 2, 2001
    Date of Patent: October 22, 2002
    Assignee: Hitachi, Ltd.
    Inventors: Masashi Koga, Tatsuhiko Kagehiro, Yoh Ueda, Shigeru Watanabe, Hiromichi Fujisawa
  • Patent number: 6291785
    Abstract: An address reader method and apparatus for recognizing a receiver address on a surface of mail. In the invention an image of the surface of the mail is input and segmented into at least one character string candidate. At least one address area candidate is extracted from the image based upon the segmented character string candidate. One of the address area candidates extracted from the image is selected as a receiver address of the mail by analyzing each of the address area candidates based on predetermined position information indicating a usual position of a receiver address area, character direction information indicating a character direction of a character string appropriate for the predetermined position information, and key character string information indicating a character string most likely to exist in a receiver address. Characters in character strings of the selected address area candidate are recognized as a receiver address which is used to sort the mail.
    Type: Grant
    Filed: February 8, 1999
    Date of Patent: September 18, 2001
    Assignee: Hitachi, Ltd.
    Inventors: Masashi Koga, Tatsuhiko Kagehiro, Yoh Ueda, Shigeru Watanabe, Hiromichi Fujisawa
  • Publication number: 20010021261
    Abstract: An address reader method and apparatus for recognizing a receiver address on a surface of mail. In the invention an image of the surface of the mail is input and segmented into at least one character string candidate. At least one address area candidate is extracted from the image based upon the segmented character string candidate. One of the address area candidates extracted from the image is selected as a receiver address of the mail by analyzing each of the address area candidates based on predetermined position information indicating a usual position of a receiver address area, character direction information indicating a character direction of a character string appropriate for the predetermined position information, and key character string information indicating a character string most likely to exist in a receiver address. Characters in character strings of the selected address area candidate are recognized as a receiver address which is used to sort the mail.
    Type: Application
    Filed: April 2, 2001
    Publication date: September 13, 2001
    Inventors: Masashi Koga, Tatsuhiko Kagehiro, Yoh Ueda, Shigeru Watanabe, Hiromichi Fujisawa
  • Patent number: 6246794
    Abstract: A character reading method has enhanced character segmentation accuracy and character string recognition accuracy for reading correctly hand-written addresses on postal matters. The method extracts provisional character patterns from image information of the address character string (step 206), creates a table 219 of tentative character patterns and implements the character classification for the tentative character patterns (step 207), extracts, specifically for characters of the street number portion of the address character string, periphery information (vertical and horizontal lengths, vertical/horizontal length ratio, pattern spacings, etc.) of tentative character patterns (step 212), and segments the character string into characters accurately based on the information (step 215).
    Type: Grant
    Filed: December 11, 1996
    Date of Patent: June 12, 2001
    Assignee: Hitachi, Ltd.
    Inventors: Tatsuhiko Kagehiro, Masashi Koga, Hiroshi Sako, Hiromichi Fujisawa, Hisao Ogata, Yoshihiro Shima, Shigeru Watanabe, Masato Teramoto
  • Patent number: 5835922
    Abstract: In an apparatus for and a method of processing document information, according to a requirement of a writer of document information, the document information is generated, referenced, and re-constructed. Further, according to a requirement of a reader of the document information, the information is referenced and re-constructed. The apparatus includes a reader terminal including means for inputting a requirement of a reader of document information and means for outputting document information referenced and re-constructed according to the requirement, and a writer terminal for inputting therefrom a requirement of a writer of document information and creating document information. The apparatus further includes a document processing unit connected to the reader terminal and the writer terminal.
    Type: Grant
    Filed: September 29, 1997
    Date of Patent: November 10, 1998
    Assignee: Hitachi, Ltd.
    Inventors: Yoshihiro Shima, Katsumi Marukawa, Masashi Koga, Kazuki Nakashima, Tetsuzo Uehara
  • Patent number: 5717794
    Abstract: A document recognition system includes various recognitive steps for document recognition, and various correctional steps corresponding to the recognitive steps. The operation modes of the system are a "sequential mode" (sequential recognition operation) in which the respective recognitive steps are executed in "step by step" fashion, an "auto mode" (batch recognition operation) in which all the recognitive steps are collectively executed, and a "retry mode" (re-recognition operation) in which the execution of any of the correctional steps is automatically followed by the execution of a necessary one of the recognitive steps. In the "sequential mode", any of the recognitive steps having been executed can be shifted, not only to the correctional step corresponding to the executed recognitive step, but also to the correctional step preceding the execution.
    Type: Grant
    Filed: October 4, 1996
    Date of Patent: February 10, 1998
    Assignee: Hitachi, Ltd.
    Inventors: Masashi Koga, Katsumi Marukawa, Yoshihiro Shima, Kazuki Nakashima
  • Patent number: 5388167
    Abstract: A file document image input can have shading removed to produce a deshaded image that is useful for highly efficient compression encoding, to be thereafter stored and transmitted in such efficient encoded form. When the image is retrieved or received, the decoded and deshaded image may have shading returned to it by combining with a shaded template image stored in the template image memory or by synthesizing shading in specified regions. By removing shading from regions, optical character recognition, shading identification or other processing such as smear prevention can be enhanced.
    Type: Grant
    Filed: March 12, 1992
    Date of Patent: February 7, 1995
    Assignee: Hitachi, Ltd.
    Inventors: Masashi Koga, Hiroshi Sakou, Masaaki Fujinawa, Hiromichi Fujisawa, Tatsuya Murakami, Yoshihiro Shima, Tsugio Takahashi, Kazunori Kinoshita, Kiyomichi Kurino, Hidefumi Masuzaki