Watermark embedding and extraction method and device

Abstract

The invention discloses a watermark embedding and extraction method and a device which are applied to a copyright management process of digital contents; the method comprises that usable punctuation areas in a text document with information to be embedded are determined according to a set area determination rule; original positions of punctuations in each usable punctuation area are respectively determined according to a set position determination rule; for each usable punctuation area, the positions of the punctuations are adjusted according to the original positions of the punctuations and corresponding codes to be embedded, so as to embed the codes to be embedded into the corresponding usable punctuation areas. When in watermark extraction, the corresponding rules are adopted to respectively extract the embedded codes in all the usable punctuation areas. The method is simple to be operated, the embedded watermark information has good hiding performance and high stability, and simultaneously, very good visual effect can be achieved.

Description

technical field [0001] The invention relates to the field of digital copyright management, in particular to a text digital watermark embedding and extraction method and device based on punctuation for digital text. Background technique [0002] With the acceleration of global information digitization, a large number of text materials are emerging, such as personal files, medical records, academic certificates, patent certificates, handwritten signatures, library collections, confidential documents, etc. are all common forms of text. The importance is self-evident. In addition, with the increasing popularity of e-commerce and e-government, it is increasingly urgent to track the piracy of electronic publications issued on the Internet, and to judge the authenticity and integrity of electronic letters, official documents or faxes. Therefore, it is particularly important to embed watermarks (that is, add additional information) in text materials to achieve property rights prote...

AI Technical Summary

Problems solved by technology

[0010] Embodiments of the present invention provide a watermark embedding and extraction method and device, which are used to solve the problems of poor stability and poor concealment existing in embedding watermark information in text documents in the prior art

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