Two-layer partition and singular value decomposition based image watermarking
Xudong Li · Journal of Zhejiang University(Engineering Science) · 2006
For improving the security of watermark,a novel image digital watermarking algorithm based on two-layer gridding partition and singular value decomposition was proposed.The concept and method of two-layer gridding partition of an image were discussed,and then the watermark imbedding function of singular value decomposition based single-layer watermarking algorithm was created.Watermark was embedded into the first layer partition of the image adopting traditional algorithm,then embedded into the second layer partition using compensatory watermark embedding method,and then stable watermark was extracted with iteration method.Experimental results show that the algorithm has a good transparence of the embedded watermark and is robust against attacks including resampling,smoothing,noise adding and compression.The algorithm can extract one layer watermark when another layer watermark is removed,and watermark security is improved.