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Erschienen in:
2015 | OriginalPaper | Buchkapitel
A Reversible Data Hiding Scheme Using Ordered Cluster-Based VQ Index Tables for Complex Images
verfasst von : Junlan Bai, Chin-Chen Chang, Ce Zhu
Erschienen in: Image and Graphics
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Abstract
In the digital multimedia era, data hiding in the compression domain becomes increasingly popular in the need for speeding up the transmission process and reducing bandwidth. Recently, VQ-based watermarking techniques have attracted more attentions, e.g., Tu and Wang proposed a VQ-based lossless data hiding scheme with high payload most recently. However, their scheme produces some more overhead information. In this study, we develop a novel reversible hiding scheme which may reduce the use of overhead bits, which is especially effective for images of complex texture. Specifically, a codebook is partitioned into six clusters which are organized based on the usage frequency of codewords. We then develop a new mapping relationship among the six clusters to hide secret data more cost-effectively. The experimental results demonstrate that our proposed scheme outperforms Tu’s scheme for complex texture images.