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Shamir theory - based digital watermarking technology research

Author: YuQiuJu
Tutor: ZhaoJian
School: Northwestern University
Course: Communication and Information System
Keywords: Digital watermarking Singular Value Decomposition Shamir theory Information Sharing Wavelet transform
CLC: TP309.7
Type: Master's thesis
Year: 2010
Downloads: 66
Quote: 1
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Abstract


With the rapid development of network technology and computer information technology , human society has entered a new era of digital information . Works because of its easy access to copy simple and rapid spread of digital media as the carrier , greatly enriched human life. However , the use of computer networks , openness and sharing some malicious behavior , serious damage to the interests of creators and users of digital works , so the protection of the interests of the owner of the multimedia information has become today's digital technology is an important research topic. This paper focuses on the static image watermarking technology research , the main work is as follows : (1) first introduced the concept of the digital watermark the research background and current situation . (2) digital watermarking system definition, classification, watermark applications of digital watermarking generic model and digital image watermarking common attack methods, evaluation criteria and algorithms . (3) do a more detailed introduction to the theory of wavelet analysis , including the concept of wavelet nature , in digital image processing applications, and multi-resolution characteristics . (4 ) analysis the Shamir theory and its threshold scheme is proposed the shamir theory - based image watermarking algorithm, using secret sharing information kept thinking of the secret information is embedded in the carrier image . (5) in the algorithm to improve the conventional image of the non - blind detection watermarking scheme , designed to blind detection algorithm based on Shamir theory , experiments show that : the algorithm of digital image watermarking is not only invisible , but also the image noise , compression, shear is robust . (6 ) In order to improve the robustness spin attack , and proposed the Shamir theory DWT and SVD - based watermarking scheme , the results show: the algorithm has a good robustness .

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > General issues > Security and confidentiality > Encryption and decryption
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