Improving watermark resistance against removal attacks using orthogonal wavelet adaptation

Authors:
Jan Stolarek;Piotr Lipiński
Affiliations:
Institute of Information Technology, Technical University of Lodz, Poland;Institute of Information Technology, Technical University of Lodz, Poland
Venue:
SOFSEM'12 Proceedings of the 38th international conference on Current Trends in Theory and Practice of Computer Science
Year:
2012

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Abstract

This paper proposes a new approach for enhancing the robustness of wavelet-based image watermarking algorithms. The method adjusts wavelet used in the process of image watermarking in order to maximize resistance against image processing operations. Effectiveness of the approach is demonstrated using blind multiplicative watermarking algorithm, but it can easily be generalized to all wavelet-based watermarking algorithms. Presented results demonstrate that wavelets generated using proposed approach outperform other wavelet bases commonly used in image watermarking in terms of robustness to removal attacks.