A Robust Watermarking Scheme based on Dual Quantization of Wavelet Significant Difference

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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	模式识别实验室
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.