A new incremental watermarking based on dual-tree complex wavelet transform |
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Authors: | Joong-Jae Lee Won Kim NA-Young Lee Gye-Young Kim |
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Affiliation: | (1) School of Computing, SoongSil University, 156-743 Seoul, Korea;(2) School of Industrial Design & Art, Jeonju Kijeon Women’s College, Korea;(3) School of Computing, SoongSil University, 156-743 Seoul, Korea |
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Abstract: | This paper proposes a new incremental watermarking technique, which is robust for affine transformation and time-varying according
to the degree of distortion, using Dual-Tree Complex Wavelet Transform (DT-CWT). At the embedding step, the proposed algorithm
inserts a given watermark into the phase components of a transformed image by DT-CWT. At the extracting step, the algorithm
incrementally compares the extracted with the original watermark using correlation from lowest to highest level. The proposed
technique through performance evaluation displays that it was more robust in geometric distortions than a conventional CWT-based
watermarking. |
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Keywords: | copyright protection digital watermarking technique complex wavelet transform geometricdistortion |
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