A novel integer transform for efficient reversible watermarking

In this paper, based on a novel integer transform, an efficient reversible image watermarking method is proposed. The integer transform is a generalization of some previous works. It can be applied to a pixel block of arbitrary size with adjustable capacities. Moreover, this transform is conducted by conditionally embedding data only when the estimated distortion is acceptable. By this approach, our method can effectively reduce the embedding distortion while providing a high capacity. The experimental results show that the proposed method outperforms some state-of-the-art works.