For the last six decades, Digital Watermarking, as an art of hiding information in a cover or host image has drawn much attention of researchers from academic institutions and industry. Especially after 1990, a good number of the publications in various Journals and seminars proves the fact that the issue is considered in various disciplines with common goals and applications such as authentication and copyright protection in the era of internet. Many issues such as embedding in transformation

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... omain, attack models, capacity issues, and applications have been addressed mainly because of its multidisciplinary nature. This paper briefly brings out the issue of watermarking in the perspective of different disciplines like Communications, Information Theory, Signal Processing, Human Visual system, Coding Theory, Cryptography, Mathematics and Statistics.