期刊
IEEE SIGNAL PROCESSING LETTERS
卷 15, 期 -, 页码 721-724出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LSP.2008.2001984
关键词
Invariability of the sum of pixel pairs; pairwise difference adjustment (PDA); reversible watermarking
资金
- National Natural Science Foundation of China [60702013, 60776794, 90604032]
- 973 Program [2006CB303104]
- 863 program [2007AA01Z175]
- PCSIRT [IRT0707]
- Beijing NSF [(4073038)]
- Specialized Research Fund of BJTU
A novel reversible data hiding scheme based on invariability of the sum of pixel pairs and pairwise difference adjustment (PDA) is presented in this letter. For each pixel pair, if a certain value is added to one pixel while the same value is subtracted from the other, then the sum of these two pixels will remain unchanged. How to properly select this value is the key issue for the balance between reversibility and distortion. In this letter, half the difference of a pixel pair plus 1-bit watermark has been elaborately selected to satisfy this purpose. In addition, PDA is proposed to significantly reduce the capacity consumed by overhead information. A series of experiments is conducted to verify the effectiveness and advantages of the proposed approach.
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