Efficient Rhombus Mean Interpolation for Reversible Data Hiding

This study proposes a RDH scheme based on a novel image interpolation called Rhombus Mean Interpolation which produces images with superior perceptual quality than the existing techniques like Neighbour Mean Interpolation (NMI) [1] and Interpolation by Neighbouring Pixels (INP) [3]. The scheme has two phases - (i) image interpolation; (ii) data hiding. Experiments prove that the proposed scheme offers the benefits of higher embedding capacity with low computational complexity and better image quality than the existing schemes like NMI, INP, Nearest Neighbour Interpolation (NNI) and Bilinear Interpolation (BI).