Performance comparison of various watermarking techniques

Digital watermarking is a method to provide authenticity and copyright ownership to digital content by embedding any presume content like audio, text, data or video into the original content. This embedding of data should not damage the quality of the original content and should fulfill its objective also. From a decade a number of researchers are working on watermarking for providing security, robustness and imperceptibility to the digital images. This paper describes the information about watermarking in terms of its characteristics, application areas, types and various attacks performed on it. A comparative study of various techniques used in the field of watermarking is provided here by measuring their performance in terms of various characteristics. A number of performance measures used by various researchers are also discussed here along with possible attacks. This paper can help researchers to find various techniques used in watermarking field and their performances against various attacks for further proceedings.