A method and device for embedding and extracting image watermark based on fssvm

Abstract

The present invention relates to a method and device for embedding and extracting image watermarks based on FSSVM. The embedding method includes a scrambling step: using Arnold transformation to process the watermark image W to obtain the embedding position in the carrier image I; training step: embedding In the coordinate position of , select k sample points, and train the k sample points through fuzzy smooth support vector machine; embedding step; use fuzzy smooth support vector machine (FSSVM) for training, on the basis of standard support vector machine, the The problem is transformed into an unconstrained optimization problem, combined with the concept of fuzzy mathematics, the objective function is optimized, and the risk function is transformed into a fuzzy pair dipole problem, thereby effectively reducing the error between the predicted pixel value and the actual pixel value of the carrier image.

Description

technical field [0001] The invention relates to a digital image watermark technology in the field of information security, in particular to an image watermark embedding and extraction method. Background technique [0002] As an effective supplement to traditional encryption methods, digital image watermarking uses data embedding methods to hide in digital image products to prove the creator's ownership of his works, and as a basis for identification and prosecution of illegal infringement. At the same time, through the detection of watermark And analysis to ensure the integrity and reliability of digital information, thus becoming an effective means of intellectual property protection and digital multimedia anti-counterfeiting, has aroused people's great attention in recent years, and has become a hot spot in international academic research. For image watermarking to play its due role, it must have two basic elements: robustness and imperceptibility. Watermark robustness me...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method and device for image watermark embedding and extraction to solve the defects of standard support vector machines; through further expansion and improvement, it can also solve the poor imperceptibility and robustness of existing embedding Weak problems, as well as the problem of slow speed and low accuracy of training samples; the problem of more complex training samples; the problem of small number of keys; the problem of blind detection

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