Computer Engineering & Science >
A Novel Robust Watermarking AlgorithmBased on DWTDCTSVD
Received date: 2009-12-28
Revised date: 2010-04-16
Online published: 2011-01-25
A novel watermarking algorithm for digital images based on DWT,DCT and SVD is proposed in this paper.First, according to the decomposition criteria proposed in this paper,we apply a four layer DWT on the original image,and choose the lowfrequency subimage and the three highfrequency subimages of the fourth layer.Similarly,we apply DWT to the watermaking image and get the lowfrequency subimage and the three highfrequency subimages.Then,by using DCT,SVD and the decomposition criteria proposed in the paper,we embed the lowfrequency subimage and the three highfrequency subimages obtained from the watermarking image into those of the original image adaptively.Finally the watermarked image is obtained after the inverse SVD,DCT and DWT.In the scheme,scrambling technology is used for preprocessing and postprocessing the watermarking image's information hiding,and it also well guarantees the safety of data.Experimental results demonstrate that this method is robust.
Key words： SVD;watermarking;robust;DWT
YUAN Xiugui，ZHOU Zhen . A Novel Robust Watermarking AlgorithmBased on DWTDCTSVD[J]. Computer Engineering & Science, 2011 , 33(1) : 112 -115 . DOI: 10.3969/j.issn.1007130X.2011.
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