Patents by Inventor Yongzhi Lou

Yongzhi Lou 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).

  • Embedding and detecting hidden information
    Patent number: 8538068
    Abstract: A novel method is disclosed for detecting hidden information in a document comprising characters, including: determining layout transformation for each character in the document for detection compared with the original document; obtaining a code sequence embedded in the document for detection based on the layout transformation of each character in the document for detection and the predetermined embedding rule; decoding the code sequence to get the hidden information embedded in the document for detection.
    Type: Grant
    Filed: September 27, 2012
    Date of Patent: September 17, 2013
    Assignee: Sursen Corp.
    Inventors: Donglin Wang, Shutian Yin, Yunming Zhang, Ningsheng Liu, Yuansong Liang, Changwei Liu, Peng Gao, Yongzhi Lou, De Ouyang
  • Embedding and detecting hidden information
    Patent number: 8311265
    Abstract: A novel method is disclosed for embedding hidden information in a document comprising characters, including: determining hidden information to be embedded in each class of layout transformation respectively; acquiring a code sequence for each class of layout transformation by coding the hidden information to be embedded in the class of layout transformation; performing layout transformation on characters from the document according to the acquired code sequence for each class of layout transformation respectively.
    Type: Grant
    Filed: March 17, 2008
    Date of Patent: November 13, 2012
    Assignee: Beijing Sursen International Information Tech Co.
    Inventors: Donglin Wang, Shutian Yin, Yunming Zhang, Ningsheng Liu, Yuansong Liang, Changwei Liu, De Ouyang, Peng Gao, Yongzhi Lou
  • EMBEDDING AND DETECTING HIDDEN INFORMATION
    Publication number: 20080310672
    Abstract: A novel method is disclosed for embedding hidden information in a document comprising characters, including: determining hidden information to be embedded in each class of layout transformation respectively; acquiring a code sequence for each class of layout transformation by coding the hidden information to be embedded in the class of layout transformation; performing layout transformation on characters from the document according to the acquired code sequence for each class of layout transformation respectively.
    Type: Application
    Filed: March 17, 2008
    Publication date: December 18, 2008
    Inventors: Donglin Wang, Shutian Yin, Yunming Zhang, Ningsheng Liu, Yuansong Liang, Changwei Liu, De Ouyang, Peng Gao, Yongzhi Lou