Hybrid transform domain image zero-watermarking method based on variable parameter chaotic mapping

Abstract

The invention discloses a hybrid transform domain image zero-watermarking method based on variable parameter chaotic mapping. The method comprises a zero watermark embedding process and a zero watermark detection process. The embedding and detection of the zero watermark are both completed in a non-subsampled pyramid decomposition and discrete cosine transform hybrid transform domain. The translation invariance characteristic of non-subsampled pyramid decomposition of the image and the stability of the alternating current coefficient symbol at the special position in each coefficient block after the image is subjected to block discrete cosine transform are fully utilized, so that the method has relatively good robustness. Experimental results show that the method has good robustness for resisting various common image processing attacks, such as noise addition, filtering, JPEG compression, scaling, rotation attacks at any angle and the like, and has effectiveness and certain practical value.

Description

technical field [0001] The invention belongs to the technical fields of information security and image processing, and in particular relates to a method for zero watermarking of mixed transformation domain images based on variable parameter chaotic mapping. Background technique [0002] With the rapid development of computer networks and multimedia technologies, the dissemination and utilization of digital multimedia information such as images, audio, and video has become more convenient and faster, and the security of digital media, intellectual property protection and certification, etc. problems have also become increasingly prominent. Digital watermarking technology is to prove the copyright ownership of the media data or realize content authentication by embedding secret information in the protected data object, and it has become another powerful tool for multimedia information security protection after encryption technology. As an important branch of information hidin...

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Problems solved by technology

[0004] Up to now, although many image zero watermarking methods have been proposed one after another, most of the image zero watermarking methods have small key space and low robustness, especially It is a problem of lack of ability to resist geometric attacks such as rotation

At the same time, there are some image zero watermarking methods based on image moment and feature point matching. Although they have a certain ability to resist rotation attacks, they have high computational complexity and low practicability.

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