Difference expansion and prediction for high bit-rate reversible data hiding

Reversible data hiding deals with the insertion of auxiliary information into a host data without causing any permanent degrada- tion to the original signal. In this contribution a high capacity reversible data hiding scheme, based on the classical difference expansion insertion algorithm, is presented. The method exploits a prediction stage, followed by prediction errors modification, both in the spatial domain and in the S-transform domain. Such two step embedding allows us to achieve high embedding capacity while preserving a high image quality, as demonstrated in the experimental results. © 2012 SPIE and IS&T. (DOI: 10.1117/1.JEI.21.3.033013)