A Comparative Analysis on Reversible Watermarking Techniques in Medical Images

Digital Image watermarking is usually used for identifying the owner, provider or recipient of an image. Watermarking also can be used for other applications such as copyright protection, fingerprinting, authentication, integrity verification, broadcast monitoring and content description. Reversibility is one of the important aspects in digital image watermarking. It is also known as lossless or invertible watermarking. Compared to conventional watermarking scheme, reversible data hiding restores not only the watermark, but also the original multimedia perfectly, which is a critical requirement for medical and military applications. In this work, after presenting different classifications of reversible methods, two commonly used reversible techniques are explained and their strengths and weaknesses are discussed.