Patents by Inventor Bai Xuqiang

Bai Xuqiang 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).

  • Method and apparatus for correcting degradation of book center image by image processing based on contour of book center image
    Patent number: 6816624
    Abstract: An image processing apparatus corrects degradation of an image of a pair of spread pages of a bound book placed on a document table. The image processing apparatus includes a height obtaining unit which obtains a plurality of heights, above the document table, of a plurality of points of the pair of spread pages, based on a contour of the pair of spread pages which appears in the image, and an image correcting unit which corrects the degradation of the image based on the plurality of heights obtained by the height obtaining unit. The degradation may be unevenness of lightness, deformation, a blur, or the like.
    Type: Grant
    Filed: February 22, 2000
    Date of Patent: November 9, 2004
    Assignee: Riso Kagaku Corporation
    Inventors: Takashi Ebisawa, Bai Xuqiang, Hiroyuki Watanabe