Digital watermark method of paralleled multiple robustnesses based on multiple copyright authentications

Abstract

A parallel multiple robust digit watermarking-method based on multi-copyright certification includes making Walsh code modulation on copyright information (watermark) of different owner and parallel-embedding modulated watermark into carrier image; detecting demodulation of post watermark information based on relevant parallel blind detection when parallel detection is carried out.

Description

technical field [0001] The present invention relates to the authentication of multiple copyrights. At the same time, the Walsh code in the communication theory is used to ensure the orthogonality between multiple watermark information. The owner realizes the embedding and detection of the watermark in parallel and is independent of each other, which belongs to information security and multimedia signal processing. field. Background technique [0002] Since digital watermarking technology was proposed in 1993, it has been widely concerned at home and abroad. In recent years, with the development of digital communication technology, computer network technology and information compression coding technology, the piracy problem and copyright disputes caused by it have become increasingly serious. Social issues, and digital watermarking technology, as an important branch of information hiding, has achieved outstanding achievements in the protection of intellectual property rights ...

AI Technical Summary

Problems solved by technology

[0006] (1) Embed the same watermark in different sub-bands, as long as the watermark in any sub-band is detected during detection, the existence of the watermark is judged; the watermark embedded in this method has a small capacity, resulting in waste of capacity, and blind detection cannot be realized;

[0007] (2) Zero watermark information embedding: the original image and the original watermark are loaded together to generate a new watermark, which is essentially the generation of a new watermark without embedding the watermark in the carrier image; it is not very practical and feasible;

[0008] (3) Digital watermarking method based on spread spectrum; this method has good robustness, but due to the addition of spread spectrum, the actual embedded watermark information is small, and the invisibility of the image is reduced

[0011] Generally speaking, the watermark detection (brightness detection) algorithm with the participation of the original image has strong robustness, because it can effectively remove the interference of various noise signals, eliminate the correlation between the image and the signal, and make the detection more accurate. Reliable and accurate, but from a practical point of view, many changes have been added to the transmission and storage of the original image, so the more practical watermarking schemes are all looking for a watermark detection algorithm that does not require the original image (blind detection)

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