摘要: This paper proposes a wavelet-tree-based blind watermarking scheme for copyright protection. The wavelet coefficients of the host image are grouped into so-called super trees. watermark is embedded by quantizing trees so quantized that they exhibit large enough statistical difference, which will later be used extraction. Each bit in perceptually important frequency bands, renders mark more resistant to based attacks. Also, spread throughout spatial regions. yields robustness against time domain geometric Examples various attacks given demonstrate proposed technique.
nctu.edu.tw
acm.org参考文章(23)
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