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Optical Engineering

Robustness analysis of image watermarking based on discrete fractional random transform
Author(s): Qing Guo; Zhengjun Liu; Shutian Liu
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Paper Abstract

The robustness of a watermarking scheme based on the discrete fractional random transform has been investigated and demonstrated to be superior to those based on the discrete cosine transform, discrete fractional Fourier transform, and discrete Fourier transform. The spectrum distribution of the discrete fractional random transform is random and uniform, which guarantees good robustness. In addition, the discrete fractional random transform itself can serve as a secret key, and can provide high capacity while ensuring robustness in image hiding. Moreover, the feature of real output of the discrete fractional random transform with a half periodicity in its eigenvalues can save storage space of image data and is convenient for storage. Numerical simulations have confirmed our analysis and demonstrated the superiority of the discrete fractional random transform.

Paper Details

Date Published: 1 May 2008
PDF: 9 pages
Opt. Eng. 47(5) 057003 doi: 10.1117/1.2920339
Published in: Optical Engineering Volume 47, Issue 5
Show Author Affiliations
Qing Guo, Harbin Institute of Technology (China)
Zhengjun Liu, Harbin Institute of Technology (China)
Shutian Liu, Harbin Institute of Technology (China)


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