Digital watermark embedding and detecting method based on phase-shifting interferometry and singular value decomposition

Abstract

The invention discloses a digital watermark embedding and detecting method based on phase-shifting interferometry and singular value decomposition. The method includes two processes of watermark embedding and watermark detection, the embedding process includes watermarking information encryption is achieved by double random phase encoding and the phase-shifting interferometry of a Fresnel domain, and after encryption, a watermark image is embedded into a singular value transform domain of a host image; and an extraction method includes extracting encrypted information from a watermark image contained singular value matrix to be detected, and deciphering through double random phase decoding and the phase-shifting interferometry of the Fresnel domain to obtain a gray-scale watermark image. Compared with prior digital watermarking methods, the digital watermark embedding and detecting method based on the phase-shifting interferometry and the singular value decomposition has the advantages that the invisibility and robustness are remarkably improved, the shear-resistant capability is greatly improved, a series of image processing modes can be resisted, and high robustness and excellent safety are achieved.

Description

technical field [0001] The invention relates to a digital watermark embedding and detection method based on phase-shift interferometry and singular value decomposition, belonging to the technical field of information security. Background technique [0002] With the rapid development of information science and network technology, digital multimedia information exchange has reached unprecedented depth and breadth. The ensuing issues of information security and intellectual property protection and certification are also becoming more and more prominent, and the copyright protection of digital products is imminent. Digital watermarking technology is a technology for digital product copyright protection and data security maintenance that has emerged in recent years, and is a research hotspot in the current international academic circles. [0003] At present, research on embedding methods for image digital watermarking can be divided into two categories: spatial domain watermarki...

AI Technical Summary

Problems solved by technology

Existing general digital watermarking schemes based on discrete cosine transform (DCT), discrete Fourier transform (DFT) and discrete wavelet transform (DWT) are robust to image compression, image filtering, and noise attacks. However, the robustness against clipping attacks and geometric attacks still needs to be further improved

[0004] In recent years, the optical holographic image itself has received extensive attention in digital watermarking schemes due to its indestructible characteristics, and it has effectively solved the problem that the existing general digital watermarking technology cannot resist cropping attacks well.

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