A reversible data hiding scheme for image interpolation based on reference matrix

Data hiding is a security technique used to conceal secret information into digital media. Reversible data hiding can guarantee that the secret message can be extracted correctly and that the cover image can be reconstructed exactly. In this paper, we presented our design of a new reversible data hiding scheme, which is based on Sudoku reference matrix and can enhance the performance of some reversible data hiding schemes for image interpolation. This allows embedding more secret bits into a pair of pixels while maintaining the small distortion of the stego-image. Our experimental results indicate that the proposed scheme had a higher embedding capacity than some other previous schemes. In addition, the proposed scheme maintains a better visual quality of the stego-image than some existing schemes.