文章基本信息

标题：A Geometric Distortion Resilient Image Watermark Algorithm Based on DWT-DFT
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作者：Hu, Yuping ; Wang, Zhijian ; Liu, Hui 等
期刊名称：Journal of Software
印刷版ISSN：1796-217X
出版年度：2011
卷号：6
期号：9
页码：1805-1812
DOI：10.4304/jsw.6.9.1805-1812
语种：English
出版社：Academy Publisher
摘要：In this paper, a robust watermarking algorithm against geometric distortions and common signal processing is proposed. This algorithm is based on two method to solve the synchronization of the original watermarking images and test images in the wavelet domain watermarking. One method, which estimates rotation and scaling based on embedding a template in a circle of middle frequency in DFT, One method which estimates translation based on extracting an invariant centroid from a restricted area inside the image. In the embedding process, a watermark is embedded adaptively in low band of DWT domain, according to the conceal quality of Human Visual System (HVS).The experiment results show robustness against common signal processing attacks ,several geometric distortions and some combination attacks, Also the comparison with the prior algorithms shows the better performance of the proposed algorithm.
关键词：Digital watermarking ;Wavelet transform;Direct Fourier transform;Geometric distortions