Compressive-sensing-based digital image watermark embedding and extraction method

Abstract

The invention discloses a compressive-sensing-based digital image watermark embedding and extraction method, and belongs to the technical fields of information hiding and image processing. The method comprises the following steps of performing sparsification processing on binary digital image watermark information to obtain sparse one-dimensional watermark information, and constructing a measurement matrix which is used as a key; measuring the one-dimensional watermark information to realize the compression and the encryption of the one-dimensional watermark information by using the key; performing discrete cosine transform on original carrier image information, blocking the transformed discrete cosine transform-domain information, and embedding the processed watermark information into a carrier image to obtain a watermark-containing image. According to the method, a compressive sensing method is used for processing watermarks, so that dual functions of watermark compression and encryption are realized, the number of the embedded watermarks is increased, the invisibility and the security are enhanced, and the overall performance of the watermarks is remarkably improved; an SBHE (scrambled block hadamard ensemble) matrix is applied, so that the method is small in memory space, high in calculation speed and simple in hardware; sparsity is introduced into a compressive sensing reconstruction process, so that the reconstruction accuracy and effects are greatly improved.

Description

technical field [0001] The invention belongs to the technical field of information hiding and image processing, in particular to a digital image watermark embedding and extraction method based on compressed sensing. Background technique [0002] Information hiding is a new research hotspot in the field of information security. Information hiding includes secret-related data communication in an open network environment, intellectual property protection of digital products, authenticity identification of important documents and digital signatures, and post-disclosure of confidential documents. The source tracking of news provides reliable information security guarantee. Digital watermarking technology is an important branch of information hiding technology. [0003] Digital watermarking technology is an effective method for copyright protection, content authentication and data integrity protection, and has always been concerned and valued by researchers in the field of copyri...

AI Technical Summary

Problems solved by technology

Digital image watermarking algorithms are mainly divided into: spatial domain watermarking technology and transform domain watermarking technology. Spatial domain watermarking technology has disadvantages such as poor robustness, unbalanced watermark information embedding, poor anti-attack ability and security, and transform domain watermarking technology for noise. The robustness is relatively strong, but it has the disadvantage of small embedding capacity

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