Improved Spread Spectrum Image WatermarkingVia Difference Modulation
Received date: 2003-01-24
Revised date: 2003-04-11
Online published: 2004-03-19
刘飞龙 , 王阳生 . 基于差调制的扩频水印算法(英文)[J]. 中国科学院大学学报, 2004 , 21(2) : 191 -201 . DOI: 10.7523/j.issn.2095-6134.2004.2.008
Currently,spread spectrum watermarking is a kind of robust watermarking technology.How toimprove the robustness of spread spectrum watermarking becomes the focus of current research on robustwatermarking.In this paper,we use the differences between the pixel value and its predictive value,which is calculated by its surrounding pixels,to embed watermark so that we can reduce the effect by theoriginal image on the robustness,and then strengthen the robustness of spread spectrum watermarking.Theoretical analysis shows that our algorithm can achieve small false alarm and false rejection probabilitiessimultaneously,which implies that it has good robustness.Experimental results demonstrate that the algorithmis robust to common typical attacks such as JPEG compression,median filtering,noise addition andimage resizing
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