Patents by Inventor Wenfa Qi
Wenfa Qi 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).
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Patent number: 9111341Abstract: The application provides a method for partitioning a watermark image with western language characters, comprising: partitioning a western language characters image along rows and columns to form a plurality of character image blocks; identifying valid character image blocks from the formed character image blocks; counting sizes of the valid character image blocks to determine if the image corresponds to a document with a large font size or a document with a small font size; dividing words in the image into a plurality of groups, wherein each divided group in the document with large font size has different numbers of words from that with small font size; and dividing equally the divided word groups into multiple portions corresponding to watermark image blocks. The application further provides a device for partitioning a watermark image with western language characters. The operability of watermark embedding process can be ensured through the above technical solution.Type: GrantFiled: December 23, 2011Date of Patent: August 18, 2015Assignees: Peking University Founder Group Co., Ltd., Peking University, Beijing Founder Electronics Co., Ltd., Peking Universit Founder R & D CenterInventors: Gaoyang Wang, Wenfa Qi, Lidong Wang, Bin Yang
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Patent number: 8976383Abstract: Disclosed is a method and system for document printing management and control and source tracking. A printing management service program runs at a server end. A printing monitoring service program runs at a client end. The printing management service program saves client end information, monitors and manages a client end computer, sets a printing management policy, and delivers operation instructions to the client end. The printing monitoring service program collects the client end information, sends the client end information to the server end, and executes the operation instruction.Type: GrantFiled: December 27, 2011Date of Patent: March 10, 2015Assignees: Peking University Founder Group Co., Ltd., Peking University, Beijing Founder Electronics Co., Ltd., Peking University Founder R&D CenterInventors: Wenfa Qi, Shuchang Han, Gaoyang Wang, Lidong Wang, Bin Yang
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Publication number: 20140003649Abstract: The application provides a method for partitioning a watermark image with western language characters, comprising: partitioning a western language characters image along rows and columns to form a plurality of character image blocks; identifying valid character image blocks from the formed character image blocks; counting sizes of the valid character image blocks to determine if the image corresponds to a document with a large font size or a document with a small font size; dividing words in the image into a plurality of groups, wherein each divided group in the document with large font size has different numbers of words from that with small font size; and dividing equally the divided word groups into multiple portions corresponding to watermark image blocks. The application further provides a device for partitioning a watermark image with western language characters. The operability of watermark embedding process can be ensured through the above technical solution.Type: ApplicationFiled: December 23, 2011Publication date: January 2, 2014Applicants: Peking University Founder Group Co., Ltd., PEKING UNIVERSITY FOUNDER R & D CENTER, BEIJING FOUNDER ELECTRONICS CO., LTD., PEKING UNIVERSITYInventors: Gaoyang Wang, Wenfa Qi, Lidong Wang, Bin Yang
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Publication number: 20130335785Abstract: Disclosed is a method and system for document printing management and control and source tracking. A printing management service program runs at a server end. A printing monitoring service program runs at a client end. The printing management service program saves client end information, monitors and manages a client end computer, sets a printing management policy, and delivers operation instructions to the client end. The printing monitoring service program collects the client end information, sends the client end information to the server end, and executes the operation instruction.Type: ApplicationFiled: December 27, 2011Publication date: December 19, 2013Applicants: Peking University Founder Group Co., Ltd., Peking University Founder R&D Center, Beijing Founder Electronics Co., Ltd., Peking UniversityInventors: Wenfa Qi, Shuchang Han, Gaoyang Wang, Lidong Wang, Bin Yang
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Patent number: 8120795Abstract: This invention relates to a method for preventing a copy of document, belonging to a technical field of entire copy protection of document. In the prior art, for some important documents, specially the secret ones, the reproduction of this kind of document is usually prohibited by its owner because of the security. But the technique in the prior art can not solve the problem of preventing unauthorized reproduction. The method of the present invention is intended to embed a shading pattern under the original image of anti-copy document by an application program installed in the copy device, and decide whether the document can be copied legally or not. By the method of present invention, it is possible to detect the watermark information of the anti-copy document accurately and quickly, and prevent the reproduction of the anti-copy document thoroughly. Moreover, an additional memory space is no need.Type: GrantFiled: April 29, 2006Date of Patent: February 21, 2012Assignees: Peking University Founder Group Co., Ltd.;, Beijing Founder Electronics Co., Ltd.;, Peking UniversityInventors: Wenfa Qi, Jiquan Xie, Bin Yang, Xiaohong Ding, Jiang Deng
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Patent number: 8107129Abstract: Disclosed are a method and apparatus for embedding or detecting watermarks in a text, which belong to the field of document protection. The method and apparatus overlay an additional layer of shade in a document for recording a large amount of information from watermarks. The shade comprises the dots arranged under certain rules. Shifts of the dots record each bit string within the watermark. According to the method and apparatus, a large amount of information can be embedded and the watermarks embedded in the shade are dispersed together with the document which can be digitized by a scanner for being detected.Type: GrantFiled: April 29, 2006Date of Patent: January 31, 2012Assignees: Peking University Founder Group Co., Ltd., Beijing Founder Electronics Co., Ltd., Peking UniversityInventors: Bin Yang, Wenzhe Shi, Wenfa Qi, Shengyuan Cheng, Lidong Wang
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Publication number: 20090257076Abstract: This invention relates to a method for preventing a copy of document, belonging to a technical field of entire copy protection of document. In the prior art, for some important documents, specially the secret ones, the reproduction of this kind of document is usually prohibited by its owner because of the security. But the technique in the prior art can not solve the problem of preventing unauthorized reproduction. The method of the present invention is intended to embed a shading pattern under the original image of anti-copy document by an application program installed in the copy device, and decide whether the document can be copied legally or not. By the method of present invention, it is possible to detect the watermark information of the anti-copy document accurately and quickly, and prevent the reproduction of the anti-copy document thoroughly. Moreover, an additional memory space is no need.Type: ApplicationFiled: April 29, 2006Publication date: October 15, 2009Applicants: Peking University Founder Group Co. Ltd., Beijing Founder Electronics Co. Ltd, Peking UniversityInventors: Wenfa Qi, Jiquan Xie, Bin Yang, Xiaohong Ding, Jiang Deng
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Publication number: 20080297853Abstract: Disclosed are a method and apparatus for embedding or detecting watermarks in a text, which belong to the field of document protection. The method and apparatus overlay an additional layer of shade in a document for recording a large amount of information from watermarks. The shade comprises the dots arranged under certain rules. Shifts of the dots record each bit string within the watermark. According to the method and apparatus, a large amount of information can be embedded and the watermarks embedded in the shade are dispersed together with the document which can be digitized by a scanner for being detected.Type: ApplicationFiled: April 29, 2006Publication date: December 4, 2008Applicants: PEKING UNIVERSITY FOUNDER GROUP CO., LTD., BEIJING FOUNDER ELECTRONICS CO., LTD., PEKING UNIVERSITYInventors: Bin Yang, Wenzhe Shi, Wenfa Qi, Shengyuan Cheng, Lidong Wang