Robust digital image adaptive zero-watermarking method

Abstract

The invention discloses a robust digital image adaptive zero-watermarking method. The method mainly comprises two parts, namely zero-watermark embedding and zero-watermark detection, wherein both the zero-watermark embedding and the zero-watermark detection are performed in a composite domain of discrete wavelet transform and discrete fourier transform; the characteristics of high stability of a wavelet approximation subgraph obtained by the discrete wavelet transform and translation invariance of an amplitude spectrum obtained by the discrete fourier transform are fully utilized, so that the method has high robustness, can resist common image processing and is completely immune from image translation attack; meanwhile, because a binary digital watermark is not embedded into the original digital image but is registered into a watermark database, no damage is caused to the original digital image data, the problem of quality reduction of the image does not exist, the embedded binary digital watermark is completely imperceptible, and the contradiction between the robustness and the imperceptibleness of the digital watermark can be balanced well.

Description

technical field [0001] The invention relates to a digital watermark technology, in particular to a robust digital image self-adaptive zero watermark method. Background technique [0002] With the rapid development of computer network and multimedia technology, digital media such as digital images, digital audio, digital video, etc. become increasingly prominent. For example, any user can easily obtain other people's original digital media through the network, and without the permission of the author or copyright owner, arbitrarily copy, modify and retransmit the original digital media, thereby seriously infringing the author's copyright and Benefits of Copyright Owners. [0003] As a supplement to encryption technology, digital watermarking technology can effectively solve the problems of original digital media security, copyright protection and authentication, and has become an important branch of the current digital media information security field. Digital watermarking...

AI Technical Summary

Problems solved by technology

[0011] At present, zero watermark technology is still in the stage of exploration and development. Although many zero watermark methods have been proposed, the robustness of most zero watermark methods is not ideal, which is not conducive to the copyright protection and content authentication of digital media works.

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