Two-stage image robust reversible information hiding method based on singular value decomposition

Abstract

The invention discloses a two-stage image robust reversible information hiding method based on singular value decomposition, which comprises the steps of embedding a watermark and extracting the watermark, and when the watermark is extracted, the watermark is extracted in different ways according to whether an image is attacked or not. According to the method, the watermark is embedded into the maximum value in the S matrix which is not easy to change even when attacked through singular value decomposition, and compared with a classical robust reversible information hiding algorithm, the method can effectively resist malicious attacks such as JPEG attacks, Gaussian filtering and scaling. In addition, the designed improved quantization watermark algorithm rounds the S value to effectively reduce the auxiliary information embedded in the second stage, and the quantization error and the watermark error in the first stage are used as the auxiliary information embedded in the second stage to improve the feasibility of the reversible embedding amount. The method can be applied to the fields of copyright protection, image protection and the like, and has a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of image analysis, in particular to a two-stage image robust reversible information hiding method based on singular value decomposition. Background technique [0002] In satellite images, medical images, and micro-images, which have high requirements for image fidelity and robustness, the irreversible loss of robust watermarking and the fragility of reversible watermarking are intolerable, which makes the research The researchers developed a brand new watermarking algorithm: robust reversible watermarking algorithm. In the absence of attack, the robust reversible watermarking algorithm can extract the watermark and recover the cover image at the decoding end. However, when the watermarked image is maliciously attacked, the watermark can also be extracted correctly, but the reversibility is destroyed, making the carrier image irrecoverable. [0003] The early robust reversible watermarking algorithm propose...

AI Technical Summary

Problems solved by technology

However, the robust feature used by the classic robust reversible watermarking algorithm is related to the position of the pixel, which leads to the failure of decoding for geometric attacks.

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