Two-color image blind watermarking method based on Hessenberg disintegration

Abstract

The invention discloses a color image blind watermarking method. A color digital image is used as a digital watermark to be inserted in a color host image by utilizing Hessenberg matrix disintegration, and the inserted color image watermark is good in invisibility, so that the requirement for protecting a copyright based on a color image marker can be met. A 4*4 pixel block is disintegrated in a Hessenberg way, the encrypted color image digital watermark information is inserted into a maximum coefficient of the Hessenberg matrix by utilizing a coefficient quantization technology, the original host image or the original watermark image is not needed when the watermark is extracted, and a blind detection object can be realized. The method is good in watermark algorithm performance and suitable for the copyright protection adopting the color digital image as the digital watermark.

Description

technical field [0001] The invention belongs to the technical field of information security, and relates to the copyright protection of large-capacity color digital images as digital watermarks. Background technique [0002] With the rapid development of Internet and multimedia technology, illegal copying of digital works, malicious tampering copyright protection, etc. have become more and more serious problems to be solved urgently. There are two outstanding problems in the current digital watermarking copyright protection technology: one is to use Most of the signs for copyright protection are pseudo-random sequences, binary images, and grayscale images; secondly, most of the existing digital watermarking methods for color images are non-blind watermarking techniques; this is mainly because binary or grayscale images are more convenient than color images. However, when embedding color image digital watermarks with more information, watermark encoding, embedding and extract...

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of Internet and multimedia technology, illegal copying of digital works, malicious tampering copyright protection, etc. have become more and more serious problems to be solved urgently. There are two outstanding problems in the current digital watermarking copyright protection technology: one is to use Most of the signs for copyright protection are pseudo-random sequences, binary images, and grayscale images; secondly, most of the existing digital watermarking methods for color images are non-blind watermarking techniques; this is mainly because binary or grayscale images are more convenient than color images. When embedding a color image digital watermark with a large amount of information, it will be more difficult to encode, embed and extract the watermark, which reduces the invisibility and robustness of the watermark

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