A reversible data hiding scheme for VQ indices using locally adaptive coding

Authors:
Chin-Chen Chang;Thai Son Nguyen;Chia-Chen Lin
Affiliations:
Department of Information Engineering and Computer Science, Feng Chia University, Taichung 40724, Taiwan, ROC and Department of Computer Science and Information Engineering, National Chung Cheng U ...;Department of Information Engineering and Computer Science, Feng Chia University, Taichung 40724, Taiwan, ROC;Department of Computer Science and Information Management, Providence University, Taichung 43301, Taiwan, ROC
Venue:
Journal of Visual Communication and Image Representation
Year:
2011

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Abstract

Data hiding is designed to solve the problem of secure information exchange through public networks such as Internet. In this paper, we present an improved reversible data hiding scheme that can recover original VQ indices after data extraction. As with Chang et al.'s scheme, our proposed scheme also depends on the locally adaptive coding scheme. However, experimental results confirm that the hiding capacity of our proposed scheme is around 1.36 bpi in most digital images, which is typically higher than that of Chang et al.'s [17]. Moreover, the average compression rate that can be achieved with our proposed scheme is 0.49 bpp, which outperforms both Lin and Chang's scheme (0.50bpp), Tsai (0.50 bpp), Chang et al.'s scheme (0.53 bpp), and Yang and Lin's scheme (0.53 bpp).