A New Approach to Reversible Watermarking

A general digital watermarking application could not prevent the distortion of some sensitive content, like medical or military images. Since such changing of medical images is not acceptable, a reversible watermarking technique must be used to completely restore the original image after the watermark information has been extracted. The use of such a technique also enables the embedding of multiple watermarks. This paper survey recent watermarking methods and identifies research trends. A combination of two particular methods is shown to achieve the highest embedding capacity and best image quality. The reason for this is discussed and proposed as a new method.