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Feature Based Watermarking

The growth of the Internet has led to a massive distribution of digital multimedia data. This has spawned major concerns over intellectual property and ownership rights. By its nature digital data offers the possibility of mass duplication and the unfettered distribution of copyrighted materials. These concerns led to the Digital Millennium Copyright Act in 1998. Watermarking involves embedding a hidden signal, a watermark, directly into digital data in an irreversible fashion. Such a watermark can be used for standard tasks such as the copyright protection of intellectual property, the tracking of illegal copies and copy protection, the direct control of duplication devices. Watermarks can also be used to test for data tampering, say of medical data. In this chapter we will consider mainly the watermarking of images and videos with a brief description of the watermarking of relational databases. This chapter ABSTRACT