Patents by Inventor Xiong Jianmin

Xiong Jianmin 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 of and apparatus for calculating binary-coding threshold value
    Patent number: 6813386
    Abstract: An image signal read out from an original is binary-coded on the basis of a binary-coding threshold value. The binary-coding threshold value is calculated by making a histogram representing a frequency distribution of tones of the image signal, calculating the value of a peak tone at which the frequency is maximized, calculating as a first tone at which the frequency becomes equal to a predetermined level on the lower tone side of the peak tone, calculating a reference binary-coding threshold value by adding to the peak tone the difference between the first tone and the peak tone, and determining the binary-coding threshold value on the basis of the reference binary-coding threshold value.
    Type: Grant
    Filed: January 5, 2001
    Date of Patent: November 2, 2004
    Assignee: Riso Kagaku Corporation
    Inventors: Yoshifumi Noguchi, Xiong Jianmin
  • Method of and apparatus for calculating binary-coding thershold value
    Publication number: 20010007596
    Abstract: An image signal read out from an original is binary-coded on the basis of a binary-coding threshold value. The binary-coding threshold value is calculated by making a histogram representing a frequency distribution of tones of the image signal, calculating the value of a peak tone at which the frequency is maximized, calculating as a first tone at which the frequency becomes equal to a predetermined level on the lower tone side of the peak tone, calculating a reference binary-coding threshold value by adding to the peak tone the difference between the first tone and the peak tone, and determining the binary-coding threshold value on the basis of the reference binary-coding threshold value.
    Type: Application
    Filed: January 5, 2001
    Publication date: July 12, 2001
    Inventors: Yoshifumi Noguchi, Xiong Jianmin