Patents by Inventor Shigeru Shibukawa

Shigeru Shibukawa 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).

  • Statistic calculating method using a template and corresponding sub-image to determine similarity based on sum of squares thresholding
    Patent number: 7082224
    Abstract: An apparatus for calculating a normalized correlation coefficient used as a similarity evaluation measure by using image data values of pixels in a template image and image data values of pixels in a subimage, included in a search image, corresponding to the template image, has a memory that stores image data values of pixels in the search image and calculating means that calculate a sum of image data values of pixels in the template image and a sum of image data values of pixels in the first rectangular region in the search image or a sum of squares of image data values of pixels in the template image and a sum of squares of image data values of pixels in the first rectangular region in the search image.
    Type: Grant
    Filed: February 18, 2005
    Date of Patent: July 25, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Mitsuji Ikeda, Syoji Yoshida, Keisuke Nakashima, Koyo Katsura, Shigeru Shibukawa, Haruo Yoda, Takashi Hotta
  • Statistic calculating method using a template and corresponding sub-image to determine similarity based on sum of squares thresholding
    Publication number: 20050147305
    Abstract: An apparatus for calculating a normalized correlation coefficient used as a similarity evaluation measure by using image data values of pixels in a template image and image data values of pixels in a subimage, included in a search image, corresponding to the template image, has a memory that stores image data values of pixels in the search image and calculating means that calculate a sum of image data values of pixels in the template image and a sum of image data values of pixels in the first rectangular region in the search image or a sum of squares of image data values of pixels in the template image and a sum of squares of image data values of pixels in the first rectangular region in the search image.
    Type: Application
    Filed: February 18, 2005
    Publication date: July 7, 2005
    Inventors: Mitsuji Ikeda, Syoji Yoshida, Keisuke Nakashima, Koyo Katsura, Shigeru Shibukawa, Haruo Yoda, Takashi Hotta
  • Template matching image processor utilizing sub image pixel sums and sum of squares thresholding
    Patent number: 6249608
    Abstract: An image processing apparatus obtains a sum A of image data values of pixels in a template image, a sum B of squares of image data values of pixels in a template image, a sum C of image data values of pixels in a sub-image to be processed, of a search image, a sum D of squares of image data values of pixels in the sub-image of the template image, further obtains a threshold value F in advance by using the obtained values A, B, C and D, the number P of pixels in the template image, and the preset value E. Moreover, the apparatus obtains a square of each difference between an image data value of each pixel in the sub-image and that of a corresponding pixel in the template image, and performs cumulative addition for each obtained squares. If the result of cumulative addition exceeds the above-mentioned threshold value, the apparatus closes processing evaluation of a similarity between the sub-image and the template image.
    Type: Grant
    Filed: December 19, 1997
    Date of Patent: June 19, 2001
    Assignee: Hitachi, Ltd.
    Inventors: Mitsuji Ikeda, Syoji Yoshida, Keisuke Nakashima, Koyo Katsura, Shigeru Shibukawa, Haruo Yoda, Takashi Hotta