Welcome to Journal of University of Chinese Academy of Sciences,Today is

›› 2004, Vol. 21 ›› Issue (2): 191-201.DOI: 10.7523/j.issn.2095-6134.2004.2.008

Previous Articles     Next Articles

Improved Spread Spectrum Image WatermarkingVia Difference Modulation

LIU Fei-Long, WANG Yang-Sheng   

  1. National Laboratory of Pattern Recognition Institute of Automation, Chinese Academy of Sciences, Beijing 100080, China
  • Received:2003-01-24 Revised:2003-04-11 Online:2004-03-19

Abstract:

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

Key words: spread spectrum watermarking, difference modulation, watermarking embedding, watermarkingdetection, hypothesis test

CLC Number: