A robust image watermarking based on DWT-QR decomposition

Nan Lin,Jianjing Shen,Xiaofeng Guo,Jun Zhou

Communication Software and Networks（2011）

引用 4|浏览5

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摘要

In this paper, a novel optimal watermarking scheme based DWT and QR decomposition is presented. Before embedding the watermark, information was firstly encrypted to enhance the security and robustness. Then LL subband is blocked 8×8 after DWT transformation. When each of them is QR decomposed, the watermark is embedded in the first row elements of R matrix. The experimental results show that the algorithm has high robustness, invisibility and higher embedding capacity.

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关键词

dwt-qr decomposition,qr decomposition,watermarki,embedding capacity,watermark embedding,image watermarking,robust,d wt,ll subband,discrete wavelet transforms,psnr,discrete wavelet transform

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