A new approach to digital watermarking in three2dimensional (32D) space based on virt ual2optics and random mask encoding is presented. The watermarking algorithm can offer an effective solution to t he issue of copyright protection of multimedia data dist ributed via t he communication channel . The result s show t hat t he embedded watermark is robust to normal data manip ulations , such as adding noise , cropping , rotation , and J PEG compression. Because t he design concept and met hodology based on geomet ric parameter s of Virt ual2Optics was adopted , t he proposed 32D watermarking system has good security. There are large degrees of f reedom existing for designing a security lock ( s)/key ( s) , including multiple lock ( s)/key ( s) and multi2dimensional lock ( s)/key ( s) . Numerical experiment s are performed to validate the p roposed met hod , and sensitivities of some parameter s are quantitatively analyzed and illust rated. The possible dimensions of keys are ro

A 32D Digital Watermarking System.PDF

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