Patents by Inventor Hiroshi Shojima

Hiroshi Shojima 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: 4680804
    Abstract: A hand-written character/graphic is recognized in a character recognition mode or a graphic recognition mode designated in accordance with stroke information supplied from a tablet input device which samples the hand-written character/graphic and converts it to the stroke information. The recognition mode is automatically designated by comparing a longer one of projection lengths on x-axis and y-axis of stroke coordinates with a predetermined threshold for a hand-written character input.
    Type: Grant
    Filed: March 28, 1985
    Date of Patent: July 14, 1987
    Assignee: Hitachi, Ltd.
    Inventors: Soshiro Kuzunuki, Hiroshi Shojima, Takanori Yokoyama, Yasushi Fukunaga, Kotaro Hirasawa
  • Patent number: 4653107
    Abstract: Coordinates of a handwritten pattern drawn on a tablet are sequentially sampled by a pattern recognition unit to prepare pattern coordinate data. Based on an area encircled by segments created by the sampled pattern coordinate data of one stroke and a line connecting a start point and an end point of the one-stroke coordinate data, the sampled pattern coordinate data of the one stroke is converted to a straight line and/or curved line segments. The converted segments are quantized and normalized. The segments of the normalized input pattern are rearranged so that the input pattern is drawn in a predetermined sequence. Differences between direction angles for the rearranged segments are calculated. Those differences are compared with differences of the direction angles of the dictionary patterns read from a memory to calculate a difference therebetween. The matching of the input pattern and the dictionary pattern is determined in accordance with the difference.
    Type: Grant
    Filed: December 24, 1984
    Date of Patent: March 24, 1987
    Assignee: Hitachi, Ltd.
    Inventors: Hiroshi Shojima, Soshiro Kuzunuki, Kotaro Hirasawa
  • Patent number: 4641354
    Abstract: An apparatus for recognizing and displaying handwritten characters and figures in which input stroke information on a handwritten input character or figure is read out by an electromagnetic tablet, recognition means performs character/figure recognition on the basis of the feature of the input stroke information, display means displays the input stroke information and the result of recognition, and when the result of recognition is displayed on a display screen of the display means, stroke information having been used for recognition is erased from the display screen, and stroke information which is not yet used for recognition, is left on the display screen.
    Type: Grant
    Filed: March 28, 1985
    Date of Patent: February 3, 1987
    Assignee: Hitachi, Ltd.
    Inventors: Yasushi Fukunaga, Soshiro Kuzunuki, Hiroshi Shojima, Takanori Yokoyama, Kazuyoshi Koga, Kotaro Hirasawa, Shinichi Kawada