收稿日期: 2012-02-20
修回日期: 2012-06-08
网络出版日期: 2012-06-08
基金资助
国家自然科学基金青年基金(61003275)资助
A robust zero-watermarking algorithm based on Haar wavelet and normalization
Received date: 2012-02-20
Revised date: 2012-06-08
Online published: 2012-06-08
冷晓旭 , 肖俊 . 一种基于Haar小波和归一化的鲁棒零水印算法[J]. 中国科学院大学学报, 2013 , 30(3) : 410 -416 . DOI: 10.7523/j.issn.1002-1175.2013.03.020
A robust image zero-watermarking algorithm is proposed by using Haar transform and an improved geometric normalization method. The original image is first transformed into a standard image by using the improved geometric normalization method. The multilayer Haar transform is then applied to the standard image. Finally, the zero watermarks are constructed based on the high and intermediate frequency wavelet coefficients. Experimental results show that the algorithm has strong robustness resisting normal signal process as well as geometric attacks.
Key words： zero-watermarking; DWT; geometric normalization; geometric attack
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