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A High Performance Digital Watermarking Method Based on Hessenberg Decomposition

A digital watermarking and watermarking technology, applied in image data processing, image data processing, instruments, etc., can solve the problem of few color digital images

Active Publication Date: 2019-08-13
山东道万电气有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the current image digital watermarking algorithms use binary or grayscale images as digital watermarks, while color digital images are rarely used as digital watermarks.

Method used

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  • A High Performance Digital Watermarking Method Based on Hessenberg Decomposition
  • A High Performance Digital Watermarking Method Based on Hessenberg Decomposition
  • A High Performance Digital Watermarking Method Based on Hessenberg Decomposition

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Embodiment Construction

[0035] The object of the present invention is to provide a kind of digital watermarking method based on matrix Hessenberg decomposition, it is characterized in that realize by concrete watermark embedding algorithm and watermark extracting algorithm, the specific steps of its watermark embedding algorithm are described as follows:

[0036] The first step: generation of watermark sequence: first, a 24-bit original watermark image with a size of 32×32 W Divided into three two-dimensional color component watermarks by dimensionality reduction W m , m = 1, 2, 3 represent red, green, and blue color components respectively; secondly, the watermark of each color component is based on the private key KA Arnold transform scrambling; then, each pixel in the scrambled color component watermark is converted into an 8-bit binary number, and combined in order to generate an embedded watermark sequence; for example: 188, 198, 211 can be converted into binary numbers They are 10111100, 110...

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Abstract

The invention discloses a high performance digital watermarking method based on Hessenberg decomposition and aims to change the present situation that binary or gray scale images are usually used for thedigital watermarking, and the requirement that colorful digital images are used for the digital watermarking are met. According to the technical points, firstly dimension reduction is carried out on a colorful host image and the colorful host image is divided into 4*4 image blocks; secondly, matrix Hessenberg decomposition is carried out on each image block, the magnitude relations between the second row, the second column and the third row, the second column of the orthogonal matrix are finely adjusted, and colorful digital image watermarking is embedded into the colorful host image; and when the watermarking is extracted, only the host image containing the watermarking is needed without the help of the original watermarking or original host image, and the purpose of blind extraction is achieved. The method has the advantages that the watermarking invisibility is relatively good, the robustness is relatively high, the execution effect is relatively high, and the method is suitable for copyright protection that the colorful digital images are used as the digital watermarking.

Description

technical field [0001] The invention belongs to the technical field of multimedia information security, and relates to the copyright protection of color digital images as digital watermarks. Background technique [0002] With the rapid development of Internet and multimedia technology, various network multimedia information services have also been greatly developed. While these advanced information technologies bring convenience to the general public, they also provide convenience to pirates, thereby threatening the legitimate rights and interests of copyright owners. As one of the technical means of digital copyright protection, digital watermark technology has attracted widespread attention. The basic means of digital watermarking is to embed copyright information, product identification code and buyer's information (called watermark signal) into digital media. The embedded watermark signal should not reduce the quality of the original data, and it should not be perceive...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T1/00
CPCG06T1/0057G06T2201/0061
Inventor 苏庆堂王环英巩艳华薛梅王兆粼马艳萍
Owner 山东道万电气有限公司
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