International Journal of Emerging Trends & Technology in Computer Science (IJETTCS)
Reversible watermarking is broadly used in military and medical applications. In this paper, the authors are presenting a novel pixel replacement method, whose watermark is robust to geometric attack as well as it has maximum embedding capacity than all histogram shifting methods. This idea is generated from histogram shifting method, a well known method for reversible watermarking. Their method also maintains comparable quality of watermarked images. Other techniques affected with geometric attacks such as rotation, scaling and translation are not robust watermarking techniques. They do not recover 100% similar watermark and image with original.