Abstract
A novel 3D watermarking algorithm by combining use of computational integral imaging (CII) and cellular automata transform (CAT) is proposed in this paper. In this proposed scheme, first, the original image signal is decomposed into three resolution levels by using the level-3 2D CAT, and meanwhile, the middle-frequency domains are obtained. Then, an elemental images (EIs) array is generated by recording the information of rays of light coming from an object through a pinhole array in the CII system. The EIs array is encrypted by linear maximum-length cellular automata as the encrypted watermark embedded into the CAT middle-frequency domains. Finally, the watermarked image is obtained by using the level-3 2D inverse CAT. To verify the usefulness of the proposed algorithm, we carry out the computational experiments and present the experimental results for various attacks. Experimental results show that this proposed watermarking system provides excellent results in unobtrusiveness and robustness.
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Li, X.W., Cho, S.J. & Kim, S.T. Computational integral imaging-based 3D digital watermarking scheme using cellular automata transform and maximum length cellular automata. Multidim Syst Sign Process 25, 405–424 (2014). https://doi.org/10.1007/s11045-012-0203-6
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DOI: https://doi.org/10.1007/s11045-012-0203-6