Context based reversible watermarking

Over the past few years a lot of research are going in the field of reversible watermarking. Reversible watermarking is a novel category of watermarking schemes. It completely recover the watermark along with the original image. In starting this technique is only used for the authentication, now it is used to send highly informative information through the original image. This technique is mostly used by some important media, such as medical and military images, because these kinds of media do not allow any loss. The previous reversible watermarking techniques are least significant bit embedding, difference expansion, prediction error expansion, integer transform, expansion embedding, reversible data hiding, pattern substitution, sample projection, etc. In all these technique the data embedding capacity and image quality is comparatively less. So in this paper a new proposed system for reversible watermarking technique named context based reversible watermarking is introduced to improve the visual quality of the recovered images and to increase the embedding capacity with less computational complexity and less distortion.