Document Type : Original Research Paper


1 School of Information Science and Engineering, Rizhao Campus, Qufu Normal University, Rizhao City, Shandong Province, 276826, China

2 School of Information Science and Engineering, Rizhao Campus, Qufu Normal University Rizhao City, Shandong Province 276826, China

3 School of Information Science and Engineering Rizhao Campus, Qufu Normal University Rizhao City, Shandong Province 276826, China


In this paper, a color image watermarking algorithm based on Redundant Discrete Wavelet Transform (RDWT) and Singular Value Decomposition (SVD) is proposed. The new algorithm selects blue component of a color image to carry the watermark information since the Human Visual System (HVS) is least sensitive to it. To increase the robustness especially towards affine attacks, RDWT is adopted for its excellent shift in-variance. In addition, the SVD technique can also ensure the robustness due to the eminent properties of singular values. It is worth mentioning that the watermark information is not processed by SVD in embedding procedure, which prevents the occurrence of false positive detection. Meanwhile, to acquire a balance between imperceptibility and robustness, various scaling factor values are used towards different sub-bands. Experimental results show that the proposed algorithm has outstanding security, imperceptibility and robustness.


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