The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 17, 2013
Filed:
Sep. 27, 2012
Donglin Wang, Beijing, CN;
Shutian Yin, Beijing, CN;
Yunming Zhang, Beijing, CN;
Ningsheng Liu, Beijing, CN;
Yuansong Liang, Beijing, CN;
Changwei Liu, Beijing, CN;
Peng Gao, Beijing, CN;
Yongzhi Lou, Beijing, CN;
DE Ouyang, Beijing, CN;
Donglin Wang, Beijing, CN;
Shutian Yin, Beijing, CN;
Yunming Zhang, Beijing, CN;
Ningsheng Liu, Beijing, CN;
Yuansong Liang, Beijing, CN;
Changwei Liu, Beijing, CN;
Peng Gao, Beijing, CN;
Yongzhi Lou, Beijing, CN;
De Ouyang, Beijing, CN;
Sursen Corp., Beijing, CN;
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.