Abstract
A vector quantisation (VQ) based watermarking scheme with shadow watermark extraction ability for multi-users is proposed. One watermark is embedded only in the host image, and only the user with the first-class key can extract the original watermark directly; other users with the second-class keys can only extract the shadow watermarks. The watermark can also be obtained by combining all the shadow watermarks.
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Wang, FH., Jain, L., Pan, JS. (2003). A Multi-user Based Watermarking System with Two-Security-Level Keys. In: Kim, H.J. (eds) Digital Watermarking. IWDW 2002. Lecture Notes in Computer Science, vol 2613. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-36617-2_5
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DOI: https://doi.org/10.1007/3-540-36617-2_5
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Online ISBN: 978-3-540-36617-1
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