Abstract
Geometric distortions are simple and effective attacks rendering many watermarking methods useless. They make detection and extraction of the embedded watermark difficult or even impossible by destroying the synchronization between the watermark reader and the embedded watermark. In this paper, we propose a blind content-based image watermarking scheme against geometric distortions. Firstly, the MSER detector is adopted to extract a set of maximally stable extremal regions which are affine covariant and robust to geometric distortions and common signal processing. Secondly, every original MSER is fitted into an elliptical region that was proved to be affine invariant. In order to achieve rotation invariance, an image normalization process is performed to transform the elliptical regions into circular ones. Finally, watermarks are repeatedly embedded into every circular disk by modifying the wavelet transform coefficients. Experimental results on standard benchmark demonstrate that the proposed scheme is robust to geometric distortions as well as common signal processing.
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Xuejuan Zhang received the BE degree in computer science and technology from Dalian Nationalities Uninversity, Dalian, Liaoning, China. She is currently pursuing the ME degree with School of Computer Science and Technology, Tianjin University. She has been working as a research assistant in the Computer Vision Lab since September 2010. Her research interests lie in the computer vision field covering mainly image processing, multimedia forensic, and pattern recognition.
Xiaochun Cao received the BE and ME degrees, both in computer science, from Beihang University, Beijing, China. He received the PhD degree in computer science from the University of Central Florida, Orlando. After graduation, he spent about three years at ObjectVideo Inc. as a research scientist. Then he joined the School of Computer Science and Technology, Tianjin University, China, where he was a professor (2008–2012). He was elected into the 100 Talents Program of Chinese Academy of Sciences (CAS) and joined the Institute of Information Engineering, CAS in October, 2012. His research interests are computer vision, image processing, and information forensic and security. He has authored and coauthored over 50 peer-reviewed journal and conference papers. In 2004 and 2010, Dr. Cao was the recipient of the Piero Zamperoni best student paper award at the International Conference on Pattern Recognition.
Jingjie Li received the BS degree in faculty of science from China University of Mining and Technology, Xuzhou, Jiangsu, China. He is currently pursuing the ME degree with School of Computer Science and Technology, Tianjin University. He has been working as a research assistant in the Computer Vision Lab since July 2010. His research interests include computer vision, computer graphics, image retrieval, and multimedia forensics.
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Zhang, X., Cao, X. & Li, J. Geometric attack resistant image watermarking based on MSER. Front. Comput. Sci. 7, 145–156 (2013). https://doi.org/10.1007/s11704-013-2174-7
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DOI: https://doi.org/10.1007/s11704-013-2174-7