Patents by Inventor Takahiko Horiuchi

Takahiko Horiuchi 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: 20220075573
    Abstract: An information processing apparatus includes circuitry and a memory, the circuitry performing perceptual image conversion of converting two image data generated from one color image data respectively into perceptual images based on human visual characteristics, collation of determining whether the two perceptual images converted by the perceptual image conversion are same, and comparison result outputting of outputting the comparison result by the collation.
    Type: Application
    Filed: September 8, 2021
    Publication date: March 10, 2022
    Applicants: Ricoh Company, Ltd., National University Corporation Chiba University
    Inventors: Takahiko Horiuchi, Ren Nakamura, Midori Tanaka, Shoko Imaizumi, Tsuyoshi Sakamoto, Tatsuroh Yoshioka, Kazuhiro Miyabe
  • Patent number: 6160916
    Abstract: A sending port makes compressed digital data of continually-tone changing picture or color picture by inputting the continually tone changing picture or color picture, dividing the original picture into regions having pixels of similar tones, making an average tone image by drawing the regions with the average tones, determining boundaries between neighboring regions, extracting branch points at which more than two boundaries joins, extracting turning points at which the gradient turns discontinuously, approximating subboundaries having ends of turning points or branch points by piecewise polynomials, making a subtracting image by subtracting the average tone image from the original picture, and sending the compressed data; transmitting media transmits the compressed data from the sending port to a receiving port through telephone lines, exclusive lines or wireless; the receiving port retrieves the boundaries, the regions, the average tone image, the subtracted image and the original picture.
    Type: Grant
    Filed: July 23, 1998
    Date of Patent: December 12, 2000
    Assignee: Tsukuba Software Laboratory Co., Ltd.
    Inventor: Takahiko Horiuchi
  • Patent number: 5978511
    Abstract: An apparatus for inputting, compressing, memorizing and regenerating continually-changing tone pictures or color pictures, which allows us to store the image data by a small amount of memory, to output the regenerating picture in a short time and to enlarge the picture in any size with keeping its quality.
    Type: Grant
    Filed: March 4, 1997
    Date of Patent: November 2, 1999
    Assignee: Tsukuba Software Laboratory Co., Ltd.
    Inventors: Takahiko Horiuchi, Ryoji Haruki