Patents by Inventor Zhang Xiaomang

Zhang Xiaomang 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).

  • Image processing apparatus
    Patent number: 7065246
    Abstract: An image processing apparatus for processing complementary color image data output from an image capturing element including a complementary-color filter is provided. The apparatus comprises a middle-high-range luminance component compensation section for compensating for a middle-high-range luminance component of a low-frequency luminance signal generated based on the complementary color image data such that the low-frequency luminance signal has substantially an ideal frequency characteristic which is lower than or equal to a predetermined frequency.
    Type: Grant
    Filed: August 24, 2001
    Date of Patent: June 20, 2006
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Zhang Xiaomang, Kensuke Takai, Hideaki Kawamura, Katsuya Otoi
  • Image processing apparatus
    Publication number: 20050249404
    Abstract: An image processing apparatus for processing RGB image data output from an image capturing element including a primary-color filter, includes: a middle-high range luminance component compensation section for compensating for a middle-high range luminance component of a low-frequency luminance signal generated based on the RGB image data such that the low-frequency luminance signal has substantially an ideal frequency luminance characteristic which is lower than or equal to a predetermined frequency.
    Type: Application
    Filed: July 15, 2005
    Publication date: November 10, 2005
    Inventor: Zhang Xiaomang
  • Image processing apparatus
    Publication number: 20020041331
    Abstract: An image processing apparatus for processing complementary color image data output from an image capturing element including a complementary-color filter is provided. The apparatus comprises a middle-high-range luminance component compensation section for compensating for a middle-high-range luminance component of a low-frequency luminance signal generated based on the complementary color image data such that the low-frequency luminance signal has substantially an ideal frequency characteristic which is lower than or equal to a predetermined frequency.
    Type: Application
    Filed: August 24, 2001
    Publication date: April 11, 2002
    Inventors: Zhang Xiaomang, Kensuke Takai, Hideaki Kawamura, Katsuya Otoi
  • Character extracting method and its apparatus
    Patent number: 6289123
    Abstract: A character extracting method includes the steps of: obtaining an image of a specific region; applying a Laplacian operation to the obtained image; binarizing an image resulting from the Laplacian operation; and separating and cutting a character on a character-by-character basis based on the binarized image.
    Type: Grant
    Filed: July 8, 1998
    Date of Patent: September 11, 2001
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Zhang Xiaomang, Koichi Hatakeyama