Geometrically invariant image watermarking using Polar Harmonic Transforms

@article{Li2012GeometricallyII,
  title={Geometrically invariant image watermarking using Polar Harmonic Transforms},
  author={Leida Li and Shushang Li and Ajith Abraham and Jeng-Shyang Pan},
  journal={Inf. Sci.},
  year={2012},
  volume={199},
  pages={1-19}
}
This paper presents an invariant image watermarking scheme by introducing the Polar Harmonic Transform (PHT), which is a recently developed orthogonal moment method. Similar to Zernike moment (ZM) and pseudo-Zernike moment (PZM) approaches, PHT is defined on a circular domain. The magnitudes of PHTs are invariant to image rotation and scaling. Furthermore, the PHTs are free of numerical instability, so they are more suitable for watermarking. In this paper, the invariant properties of PHTs are… CONTINUE READING

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