Digital Watermarking Method Based on Nonsubsampled Contourlet Transform
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Information Technology Journal

Year: 2013 | Volume: 12 | Issue: 24 | Page No.: 8153-8158
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Authors

Zhao Jie

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Research Article

Digital Watermarking Method Based on Nonsubsampled Contourlet Transform

Zhao Jie
Department of Physics and Electronic Information Engineering, Shangluo University, Shangluo, China
The subbands in different scales and directions are obtained by image decomposition using the Nonsubsampled Contourlet Transform (NSCT). The multidirectional and redundancy of NSCT are employed to embed the watermark into the special subband. In order to eliminate the contradiction between imperceptibility and robustness, the watermark is adaptively embedded according to the human visual system. The blind detection can be accomplished based on correlation measurement. Geometric distortion is one of the most difficult attacks to image watermark system, since it can desynchronize the location of the watermark and causes fail watermark detection. The Scale-invariant Feature Transform (SIFT) is employed to against the scaling and rotation attacks in this study. Experimental results show that the scheme is effective and has high robustness against common attacks such as rotation, adding noise, filtering, cropping and JPEG compression.
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