Word document watermark copyright information protection device and method

Abstract

The invention discloses a Word document watermark copyright information protection device and method. A watermark information generation method and device, a watermark information embedding method anddevice and a watermark information detection method and device are specifically involved in the Word document watermark copyright information protection device and method. By extracting ridge line information of a fingerprint image and directly mapping the information onto three lines of text of a Word document, feature point information on the ridge lines is extracted and directly mapped to a 3*3 text matrix of the Word document. In a watermark embedding process, coding and decoding of fingerprint features are not needed, and the calculation efficiency is improved. Since watermarks are not subjected to a coding operation, the watermarks have the features of original fingerprints and can well adapt to embedding and detection of the watermarks with incomplete and vague fingerprint features. In a watermark information detection module, since the Word document has the fingerprint features, the features of the Word document and the features extracted from the fingerprint image are directly matched, and the calculation procedures are reduced. The word document watermark copyright information protection device and method can be applied to Word document watermark copyright information protection.

Description

technical field [0001] The invention relates to a Word document watermark copyright information protection device and method, belonging to the fields of digital watermark technology and document information protection in information security. Background technique [0002] Adding watermark information to documents is a way of copyright protection. Without changing the watermark of all the text content in the document, the method based on document structure fine-tuning is generally used to change the spatial domain of the text row and column in the document to realize the embedding of the watermark. Take advantage of people's visual insensitivity, fine-tune text display methods within the range of visual errors that are difficult for human eyes to detect, such as character spacing, line spacing, character size and color, etc., and embed encoded watermark information into documents. There is a word document digital watermarking algorithm based on Chinese fonts, which embeds wa...

AI Technical Summary

Problems solved by technology

At present, watermark embedding requires many calculation steps and consumes a lot of time, and if the watermark information is missing, the entire watermark may become invalid

The existing methods of embedding fingerprint feature watermarks into Word documents all use encoded fingerprint feature watermarks, and there is no method to directly embed fingerprint features into Word documents.

Images