Novel robust image watermarking based on subsampling and DWT

Authors:
Wei Lu;Wei Sun;Hongtao Lu
Affiliations:
School of Information Science and Technology, Guangdong Key Laboratory of Information Security Technology, Sun Yat-sen University, Guangzhou, China 510006;School of Software, Sun Yat-sen University, Guangzhou, China 510006;Department of Computer Science and Engineering, Shanghai Jiao Tong University, Shanghai, China 200240
Venue:
Multimedia Tools and Applications
Year:
2012

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Abstract

This paper presents a robust digital image watermarking scheme based on subsampling and DWT. Subsampling is firstly used to construct a subimage sequence as a video segment. Then, a random watermark sequence satisfied with Gaussian distribution is block-wised embedded into the DWT domain of these subimages repeatedly using the video watermarking technique. And watermark is detected through computing correlation between watermark and watermarked frames. The experiment results demonstrate that the proposed scheme achieves good robustness against JPEG compression, common image processing operation and geometric distortions. Furthermore, the proposed watermarking scheme is also robust against linear collusion and other video watermarking attacks.