A Print Resilient Watermark Scheme Based on Character Complexity
Author(s): LEI Min, YANG Yu, HU Ruo-xiang
Pages: 58-62
Year: 2015 Issue: z1
Journal: Journal of Beijing University of Posts and Telecommunications
Keyword: document watermark; information leak tracing; anti-printing;
Abstract: As a kind of information leaking carrier, printed documents are recently becoming a large se-curity risk. Tracing document with watermarks is an effective resolution to the problem. It is found out that the heights of neighboring characters from nature text are usually not the same, and most height rela-tionships between character pairs keep reserved after print-scan. According to it, this paper proposes a new robust watermark method by modifying character' s height. Besides, only those character pairs with similar complexity will be chosen to achieve better transparency. Experiments show that the watermark can be extracted from the texts distorted due to print-scan, print-copy, or print-photograph.
Pages: 58-62
Year: 2015 Issue: z1
Journal: Journal of Beijing University of Posts and Telecommunications
Keyword: document watermark; information leak tracing; anti-printing;
Abstract: As a kind of information leaking carrier, printed documents are recently becoming a large se-curity risk. Tracing document with watermarks is an effective resolution to the problem. It is found out that the heights of neighboring characters from nature text are usually not the same, and most height rela-tionships between character pairs keep reserved after print-scan. According to it, this paper proposes a new robust watermark method by modifying character' s height. Besides, only those character pairs with similar complexity will be chosen to achieve better transparency. Experiments show that the watermark can be extracted from the texts distorted due to print-scan, print-copy, or print-photograph.
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