An Improvement to Image Interpolating Based Data Embedding Using Reversible Pixel Shifting Modification and Direction Modification Operation

The paper is an extension of the Enhanced Neighbor Mean Interpolation (ENMI) scheme based data hiding from Chang et al., in hopes of raising the embedding capacity with limited image distortion. The scheme combines the advantages of ENMI scheme and the techniques of pixel shifting and direction modification in a reversible manner, to increase the embedding capacity, while maintaining satisfactory visual quality. The experimental results show the increment of embedding capacity is considerable. The proposed method provides the embedding rate far more than that of the compared methods.