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Image watermarking based on the space/spatial-frequency analysis and Hermite functions expansion

[+] Author Affiliations
Srdjan Stanković

University of Montenegro, Faculty of Electrical Engineering, Dzordza Vasingtona bb, 20000 Podgorica, Montenegro

Irena Orović

University of Montenegro, Faculty of Electrical Engineering, Dzordza Vasingtona bb, 20000 Podgorica, Montenegro

Marie Chabert

University of Toulouse, INP—ENSEEIHT Toulouse, 31071 Toulouse Cedex 7, France

Bijan Mobasseri

Villanova University, Villanova, Pennsylvania 19085

J. Electron. Imaging. 22(1), 013014 (Feb 06, 2013). doi:10.1117/1.JEI.22.1.013014
History: Received June 21, 2012; Revised September 20, 2012; Accepted December 18, 2012
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Abstract.  An image watermarking scheme that combines Hermite functions expansion and space/spatial-frequency analysis is proposed. In the first step, the Hermite functions expansion is employed to select busy regions for watermark embedding. In the second step, the space/spatial-frequency representation and Hermite functions expansion are combined to design the imperceptible watermark, using the host local frequency content. The Hermite expansion has been done by using the fast Hermite projection method. Recursive realization of Hermite functions significantly speeds up the algorithms for regions selection and watermark design. The watermark detection is performed within the space/spatial-frequency domain. The detection performance is increased due to the high information redundancy in that domain in comparison with the space or frequency domains, respectively. The performance of the proposed procedure has been tested experimentally for different watermark strengths, i.e., for different values of the peak signal-to-noise ratio (PSNR). The proposed approach provides high detection performance even for high PSNR values. It offers a good compromise between detection performance (including the robustness to a wide variety of common attacks) and imperceptibility.

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Citation

Srdjan Stanković ; Irena Orović ; Marie Chabert and Bijan Mobasseri
"Image watermarking based on the space/spatial-frequency analysis and Hermite functions expansion", J. Electron. Imaging. 22(1), 013014 (Feb 06, 2013). ; http://dx.doi.org/10.1117/1.JEI.22.1.013014


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