Journal of Guangxi Normal University(Natural Science Edition) ›› 2011, Vol. 29 ›› Issue (2): 195-199.

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New Digital Watermarking Algorithm Based on NSCT and SVD

XIONG Shun-qing, ZHOU Wei-hong   

  1. School of Mathematics and Computer Science,Yunnan Universityof Nationalities,Kunming Yunnan 650031,China
  • Received:2011-05-10 Published:2018-11-19

Abstract: Nonsubsampled contourlet transform(NSCT) features with multi-scale,multi-direction and translational invariance.In this paper,a newdigital watermarking algorithm is proposed based on NSCT and Singular Value Decomposition(SVD).First,Nonsubsampled Contourlet Transform is applied on the original image to obtain the low frequency component of the image.Then the Singular ValueDecomposition of low frequency component of image is carried out.At last,the watermark information is embedded into the eigenvalue matrix of low frequency component of image.The experiment results proves that the new algorithm has good resistance against rotation,JPEG compression and noise attack.Furthermore,comparedwith algorithm based DWT and SVD,oncombination of DWT with SVD and combination of of Contourletwith SVD,the watermarking algorithm based on NSCT combined with SVD significantly improves the robustness.

Key words: digital watermark, NSCT, SVD, robustness

CLC Number: 

  • TP391.4
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