Patents by Inventor Zhi-Cheng Ni

Zhi-Cheng Ni 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).

  • Methods and apparatus for reversible data hiding through histogram modification
    Patent number: 7415155
    Abstract: Methods and apparatus are provided for encoding a pixel domain image with hidden data by modifying the histogram of the pixel domain image to make space for such hidden data.
    Type: Grant
    Filed: April 12, 2004
    Date of Patent: August 19, 2008
    Assignee: New Jersey Institute of Technology
    Inventors: Yun-Qing Shi, Zhi-Cheng Ni, Nirwan Ansari
  • Methods and apparatus for reversible data hiding through histogram modification
    Publication number: 20040223627
    Abstract: Methods and apparatus are provided for encoding a pixel domain image with hidden data by modifying the histogram of the pixel domain image to make space for such hidden data.
    Type: Application
    Filed: April 12, 2004
    Publication date: November 11, 2004
    Inventors: Yun-Qing Shi, Zhi-Cheng Ni, Nirwan Ansari