Security and Watermarking of Multimedia Contents

Security and Watermarking of Multimedia Contents

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The watermark decoding It can be shown that for m-sequences and Gold Codes the dot product between tagt;j and Vj is: ^ / JV if i = j ... THE TEMPLATE The watermarking method described in the previous section presents an inherent invariance to spatial shifts or ... In order to circumvent this problem, a log-type mapping is used which allows to transform the scaling or rotation into simple shift operations.

Title:Security and Watermarking of Multimedia Contents
Author: Ping Wah Wong, Edward J. Delp
Publisher:Society of Photo Optical - 1999

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