Optimal image watermarking scheme based on chaotic map and quaternion wavelet transform |
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Authors: | Baiying Lei Dong Ni Siping Chen Tianfu Wang Feng Zhou |
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Affiliation: | 1. National-Regional Key Technology Engineering Laboratory for Medical Ultrasound, Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, Department of Biomedical Engineering, School of Medicine, Shenzhen University, Shenzhen, 518060, China 2. College of Mechatronics and Control Engineering, Shenzhen University, 3668 Nanshan Avenue, Shenzhen 518060, Guangdong, China 3. George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, 813 Ferst Drive, NW, Atlanta, GA, 30332-0405, USA
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Abstract: | In this paper, an intelligent watermarking scheme optimized by adaptive differential evolution (ADE) is proposed based on chaotic map and quaternion wavelet transform (QWT). Watermark is first scrambled by a piecewise linear chaotic map to increase security and then inserted into the real QWT amplitude coefficients intelligently. ADE algorithm is explored to optimize the watermarking parameter (i.e., scaling factors) automatically. The experimental results demonstrate the high robustness against common signal processing operations, especially geometrical distortions of the proposed algorithm. Comparison results also indicate the superiority of the proposed algorithm over the existing watermarking algorithm. |
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