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A Robust Watermarking Scheme based on Dual Quantization of Wavelet Significant Difference
Bin Ma; Yunhong Wang; Chunlei Li; Zhaoxiang Zhang; Di Huang
2012-12-04
会议名称Pacific-Rim Conference on Multimedia
会议录名称PCM 2012
会议日期4-6 December 2012
会议地点Singapore, Singapore
摘要This paper proposes a blind robust watermarking algorithm based on the quantization of significant DWT coefficients. Low frequent wavelet coefficients of the host image are randomly permutated into sub-groups firstly. To guarantee watermark robustness while preserving good fidelity, watermarking modifications are distributed on the maximum positive and minimum negative coefficients of each group which preserve the most significant local amplitudes. The difference between two largest positive (or smallest negative) coefficients is quantized to an even or odd multiple of a quantization step parameter Q according to the watermark bit to be embedded. The blind watermark extraction could be straightforwardly achieved by checking the parity of the quotient between significant differences and Q. Comparison experiments with existing methods demonstrate the superiority of our scheme on robustness against content-preserving operations and incidental distortions such as JPEG compression, Gaussian noise.
关键词Biometric Authentication Digital Watermarking Dwt Qim
文献类型会议论文
条目标识符http://ir.ia.ac.cn/handle/173211/13291
专题类脑智能研究中心
通讯作者Zhaoxiang Zhang
推荐引用方式
GB/T 7714
Bin Ma,Yunhong Wang,Chunlei Li,et al. A Robust Watermarking Scheme based on Dual Quantization of Wavelet Significant Difference[C],2012.
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