A Novel High-Capacity Reversiblewatermarking Scheme
A novel reversible data hiding scheme is proposed in this article. Each pixel is predicted by its right neighboring pixel in scan order to get its prediction-error. Then, a companding technique is introduced so as to largely increase the number of prediction-errors available for embedding. Accordingly, a location map recording available positions can be compressed into a short bitstream. By largely decreasing the capacity consumed by the compressed location map, the high hiding capacity is achieved. A series of experiments are conducted to verify the feasibility and effectiveness of the proposed approach.