摘要
Conventional quantization index modulation (QIM) watermarking uses the fixed quantization step size for the host signal.This scheme is not robust against geometric distortions and may lead to poor fidelity in some areas of content.Thus,we proposed a quantization-based image watermarking in the dual tree complex wavelet domain.We took advantages of the dual tree complex wavelets (perfect reconstruction,approximate shift invariance,and directional selectivity).For the case of watermark detecting,the probability of false alarm and probability of false negative were exploited and verified by simulation.Experimental results demonstrate that the proposed method is robust against JPEG compression,additive white Gaussian noise (AWGN),and some kinds of geometric attacks such as scaling,rotation,etc.
Conventional quantization index modulation （QIM） watermarking uses the fixed quantization step size for the host signal. This scheme is not robust against geometric distortions and may lead to poor fidelity in some areas of content. Thus, we proposed a quantization-based image watermarking in the dual tree complex wavelet domain. We took advantages of the dual tree complex wavelets （perfect reconstruction, approximate shift invariance, and directional selectivity）. For the case of watermark detecting, the probability of false alarm and probability of false negative were exploited and verified by simulation. Experimental results demonstrate that the proposed method is robust against JPEG compression, additive white Gaussian noise （AWGN）, and some kinds of geometric attacks such as scaling, rotation, etc.
基金
supported by a grant from the National High Technology Research and Development Program of China (863 Program) (No.2008AA04A107)
supported by a grant from the Major Programs of Guangdong-Hongkong in the Key Domain (No.2009498B21)
