Reversible Data Hiding Exploiting Variance in Wavelet Coefficients

Authors

  • Xu-Ren Luo Department of Electrical and Electronic Engineering, Chung Cheng Institute of Technology, National Defense University, Tahsi, Taoyuan 33509, Taiwan, Republic of China
  • Te-Lung Yin Department of Computer Science and Information Engineering, China University of Technology, Hukou, Hsinchu 303, Taiwan, Republic of China

Keywords:

Reversibility, Marked media, Wavelet transform, Wavelet coefficient, Distortion, Histogram

Abstract

In this paper, we present a new reversible data hiding scheme that utilizes the wavelet transform and better exploits the large wavelet coefficient variance to achieve high capacity and imperceptible embedding. Our scheme differs from those of previous studies in that the wavelet coefficients histogram rather than the gray-level histogram is manipulated. In addition, we design intelligent histogram-shifting rules to avoid the decimal problem in grayscale pixel values after recovery process to achieve reversibility. Small changes in the wavelet coefficients after embedding process are important factors contributing to low visual distortion in the marked image. Furthermore, an important property of our scheme is that the use of threshold differs greatly from previous schemes. The experimental results show that our scheme outperforms other reversible data hiding schemes.

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References

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Published

2011-04-01

How to Cite

Luo, X.-R., & Yin, T.-L. (2011). Reversible Data Hiding Exploiting Variance in Wavelet Coefficients. Journal of Computer Science and Technology, 11(01), p. 27–33. Retrieved from https://journal.info.unlp.edu.ar/JCST/article/view/685

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Original Articles