EVD-HG and DWT-SVD adaptive watermark image processing method

Abstract

The invention belongs to the field of digital watermarking technology and copyright protection, in order to realize self-adaptive simultaneous embedding of a plurality of color watermarks, balance theinvisibility of the embedded watermark image and the robustness of the concealment method to various geometric attacks or image processing attacks. To this end, the technical scheme adopted by the invention is that EVD-HG and DWT-SVD adaptive watermark image processing method, the image to be hidden is firstly scrambled and encrypted by Arnold transform and rotator Gyrator transform; Then, the carrier image is transformed by wavelet transform, the selected frequency part is decomposed by singular value decomposition, and the encrypted color watermarks are embedded into the singular value partof the carrier image. Finally, the singular value part of the secret image is combined with the eigenvector and then the inverse wavelet transform is performed to obtain the carrier image containingthe secret image. The invention is mainly applied to digital watermarking occasions.

Description

technical field [0001] The invention belongs to the field of digital watermark technology and copyright protection, and relates to an adaptive multi-color watermark method based on EVD-HG and DWT-SVD. Background technique [0002] The rapid popularization of the Internet, accompanied by the comprehensive development of digital technology and the easy duplication of digital media (such as audio, image, video), has increased the popularity of digital media. But sometimes there is no agreement or awareness of property, so the lack of copyright protection methods is raised. Therefore, how to protect multimedia data from being illegally used has attracted more and more attention. Digital image watermarking technology is considered to be a powerful solution to digital content protection, and its main idea is to embed a visible or invisible watermark representing the identity of the host image in the host image. The main consideration is that the host image after embedding the wa...

AI Technical Summary

Problems solved by technology

The earliest proposed digital watermarks based on DCT (Discrete Cosine Transform), DWT (Discrete Wavelet Transform), FT (Fourier Transform) and other transformations can make the watermark image have good invisibility by adjusting the embedding strength, but such operations are very difficult. It is difficult to balance the invisibility of embedded watermark images and the robustness of concealment methods to various geometric attacks or image processing attacks

Images