Proceedings of the Korean Society of Broadcast Engineers Conference (한국방송∙미디어공학회:학술대회논문집)

The Korean Institute of Broadcast and Media Engineers (한국방송∙미디어공학회)
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Enhanced Reversible data hiding scheme

  • Sachnev, V. (Department of Control and Instrumentation Engineering, Kangwon National University) ;
  • Kim, Dong-Hoi (Department of Control and Instrumentation Engineering, Kangwon National University) ;
  • Kim, Hyoung-Joong (Center for the Information Security Technologies Graduate School of Information Management and Security Korea University)
  • Published : 2007.02.23
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Abstract

We propose new reversible watermarking method for images. Being reversibility, original image and watermarked message should be recovered exactly. We propose different technique for hiding data to pairs. We use new type of histogram (pair histogram), which shows frequencies of each pair in image. We use histogram shift method for data embedding to pairs. We also propose improved version of method which allow hiding data with good performance for high capacities. This algorithm has better result compare to Tian's difference expansion method based on the Haar wavelet decomposition. For proposed algorithm capacity is higher under same PSNR.

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