A novel reversible data hiding scheme based on difference-histogram modification and optimal EMD algorithm

作者：Thai Son Nguyen; Chang Chin Chen^*; Ngoc Tu Huynh

来源：Journal of Visual Communication and Image Representation, 2015, 33: 389-397.

DOI：10.1016/j.jvcir.2015.10.008

• Data hiding
• EMD
• High efficiency
• Histogram modification
• Reversibility
• Block Classification
• Pixel Selection
• High Image Quality

Data hiding techniques, which are classified into two groups: irreversible and reversible techniques, have been gained more and more attention recently. In which, reversible data hiding (RDH) is paid more attention since it is capable to recover original host images after revealing the secret data. However, there always is tradeoff between embedding capacity and image quality. The more secret data is embedded, the lower image quality is obtained. Therefore, in this paper, we propose a new RDH scheme to embed a large amount of secrets without causing dramatically damage to images. We develop an optimal exploiting modification direction matrix to modify the difference histogram. By carefully selecting image regions and using the optimal EMD table, the output image quality can be preserved while the embedding capacity of the scheme can be significantly enhanced. Experimental results demonstrated that our scheme outperforms previous schemes in terms of embedding capacity and image quality.

• 出版日期2015-11