Improved Reversible Data Hiding in Medical images using Interpolation and Threshold based Embedding Strategy
M Mahasree · International Journal of Emerging Trends in Engineering Research · 2020
Reversible Data Hiding (RDH) techniques have become an active research topic in the field of Data Security.The two important factors in defining the efficiency of data hiding method are stego quality and payload capacity.Recently interpolation based data hiding techniques (IRDH) are useful for achieving high embedding capacity by up-scaling the carrier image to create additional space for embedding.Existing interpolation-based hiding techniques concentrate mainly on natural images.But IRDH can also be utilized for sensitive medical images to hide patient details inside them for achieving privacy protection.Thus, this paper encompasses an effective embedding procedure for interpolation based reversible data hiding schemes in medical images.The objective of our proposed scheme is to provide high visual quality as well as increased payload.The given medical image is interpolated without changing its original pixels.For embedding patient details, we propose a novel Threshold-based Embedding Strategy (TES) to increase the number of bits that can be embedded in an interpolated pixel.Experimental results show that the proposed interpolation based reversible data hiding technique achieves high stego quality and capacity than many state-of-the-art methods for medical images.