Grey wolf optimization algorithm and complete ternary tree structure wavelet domain color multi-watermark method

Abstract

The invention belongs to the field of digital image watermarking technology and copyright protection, and provides a wavelet domain color multi-watermarking technology, which can adjust the balance among invisibility, robustness and capacity of watermarks, and can also effectively resist known noise attacks, shearing attacks, rotation attacks and other attacks. Therefore, according to the grey wolf optimization algorithm and complete ternary tree structure wavelet domain color multi-watermark method, in the watermark embedding process, three color watermark images are firstly encrypted into agrey level image through a ternary tree encryption technology; then, wavelet transformation is carried out on the color host image, a selected frequency part is transformed into a YCbCr color space, then singular value decomposition is carried out, and the multiple encrypted color watermarks are embedded into a singular value part of the carrier image; and finally, the singular value part containing the secret image is combined with the feature vector, and inverse wavelet transform is performed to obtain a carrier image containing the secret image. The method is mainly applied to occasions where image watermarks are embedded.

Description

technical field [0001] The invention belongs to the field of digital image watermark technology and copyright protection, and relates to a wavelet domain color multi-watermark technology based on a gray wolf optimization algorithm and a complete ternary tree structure. Background technique [0002] With the continuous development of computer technology, while digital products (such as images, audio, video, etc.) bring convenience to people, these digital products also face problems such as illegal copying, duplication and dissemination. How to protect these digital products from illegal acquisition or copying is an urgent research topic in the field of network security. In order to solve the above problems, digital watermarking technology and encryption technology have been proposed one after another. [0003] The main principle of digital watermarking technology is to embed watermarks with copyright information into digital multimedia without affecting the original value o...

AI Technical Summary

Problems solved by technology

However, the embedding factor in the usual watermarking technology is determined by artificial experiments, and there are chances and uncertainties.

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