Abstract
This paper proposes an improved method for reversible data hiding in encrypted image based on Zhang’s algorithm when the embedding ratio is considered. A new fluctuation function is presented to evaluate the smoothness of image block. The fluctuation values of blocks are calculated, and then are sorted in ascending order. The blocks that the fluctuation values are smaller are selected to embed data. The number of blocks to be selected depends on the embedding ratio. Experimental results show that the new fluctuation function can give a better estimation, meanwhile the proposed method can achieve lower extracted-bit error rate than randomly selecting blocks in condition that the embedding ratio is considered.
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Acknowledgments
This work was partially supported by National Natural Science Foundation of China (No. 61103215, 61232016, 61202439, 61202496, 61373132, 61303045, and 61373133), Hunan Provincial Natural Science Key Foundation of China (No. 13JJ2031), National Social Science Fund Projects (No. 13CJY007), Youth Growth Plan of Hunan University, Ministry of Education, Humanities and Social Sciences Research Projects (No. 12YJAZH216).
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Liu, Y., Liu, Z. (2015). An Improved Method for Reversible Data Hiding in Encrypted Image. In: Wang, G., Zomaya, A., Martinez, G., Li, K. (eds) Algorithms and Architectures for Parallel Processing. ICA3PP 2015. Lecture Notes in Computer Science(), vol 9532. Springer, Cham. https://doi.org/10.1007/978-3-319-27161-3_3
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DOI: https://doi.org/10.1007/978-3-319-27161-3_3
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