A Comparative Study of Chaotic and White Noise Signals in Digital Watermarking

Mooney, Aidan and Keating, John and Pittas, Ioannis (2008) A Comparative Study of Chaotic and White Noise Signals in Digital Watermarking. Chaos, Solitions and Fractals, 35 (5). pp. 913-921. ISSN 0960-0779

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Digital Watermarking is an ever increasing and important discipline, especially in the modern electronically-driven world. Watermarking aims to embed a piece of information into digital documents which their owner can use to prove that the document is theirs, at a later stage. In this paper, performance analysis of watermarking schemes is performed on white noise sequences and chaotic sequences for the purpose of watermark generation. Pseudorandom sequences are compared with chaotic sequences generated from chaotic skew tent map. In particular, analysis is performed on highpass signals generated from both these watermark generation schemes, along with analysis on lowpass watermarks and white noise watermarks. This analysis focuses on the watermarked images after they have been subjected to common image distortion attacks. It is shown that signals generated from highpass chaotic signals have superior performance than highpass noise signals, in the presence of such attacks. It is also shown that watermarks generated from lowpass chaotic signals have superior performance over the other signal types analysed.

Item Type: Article
Additional Information: Preprint version of original published article.
Keywords: White Noise Signals; Digital Watermarking;
Academic Unit: Faculty of Science and Engineering > Computer Science
Item ID: 743
Depositing User: Aidan Mooney
Date Deposited: 17 Oct 2007
Journal or Publication Title: Chaos, Solitions and Fractals
Publisher: Elsevier Science
Refereed: Yes

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