Reversible Picture Watermarking by Interpolation Technique

watermarking implant information into a digital signal like audio, Picture, or video. Reversible Picture watermarking can bring back the original picture without any distortion after the hidden data is extracted. In this paper, we present a novel reversible watermarking scheme using an interpolation procedure, which can embed a large amount of covert data into Pictures with imperceptible modification. Different from previous watermarking schemes, we utilize the interpolation-error, the difference between interpolation value and corresponding pixel value, to embed bit “1” or “0” by expanding it additively or leaving it unchanged. Due to the slight modification of pixels, high Picture quality is preserved. Experimental results also demonstrate that the proposed scheme can provide greater payload capacity and higher Picture fidelity compared with other state-of-the-art schemes. Keywords—Additive interpolation-error expansion, data hiding, inter-polation-error, reversible watermarking.