DIGITAL WATERMARKING

·       IntroductionA watermark is a form, image or text that is impressed into paper thatprovides evidence of its authenticity. It is the form of bit pattern that isinserted into a digital image, audio or video file which identifies the file’scopyright information.

The watermarking techniques are classified based on twodomains. Spatial domain is that the two subset positions are changed based inthe perceptual analysis denotes the variant intensity value in the image. Adigital watermark is a kind of marker covertly embedded in a noise-tolerantsignal such as an audio, video, image data. ·       Related Literature/Works           Digitalwatermarking is a technology of embedding watermark with intellectual propertyrights into images, videos, audios, and other multimedia data by a certainalgorithm. The basic characteristics of digital watermark are imperceptibility,capacity, robustness and false positive of watermarking algorithm and securityof the hiding place.

Moreover, it is concluded that various attacks operatorsare used for the assessment of watermarking systems, which supplies anautomated and fair analysis of substantial watermarking methods for chosenapplication areas.   ·      Summary of findings from literature         Watermarking the image files hasrecently become the focus of much attention. The transmission rate of the dataover internet has played the major challenge that allows the illegalproliferation of the watermarking relies on the desire to preserve the filequality and also the damaging of the files need to be prevented. This review onthe different watermarking techniques gives the clear concept of thewatermarking scheme. ·      Future research/DevelopmentpropositionsThe advent of the Internet has resulted in many newopportunities for the creation and delivery of content in digital form. Applicationsinclude electronic advertising, real time video and audio delivery, digitalrepositories and libraries, and Web publishing. An important issue that arisesin these applications is the protection of the rights of all participants.

*Ithas been recognized for quite some time that current copyright laws areinadequate for dealing with digital data. This has led to an interest towards developing new copy deterrenceand protection mechanisms. One such e?ort that has been attracting increasinginterest is based on digital watermarking techniques. Digital watermarking isthe process of embedding information into digital multimedia content such thatthe information (which we call the watermark) can later be extracted ordetected for a variety of purposes including copy prevention and control.Digital watermarking has become an active and important area of research, anddevelopment and commercialization of watermarking techniques is being deemedessential to help address some of the challenges faced by the rapidproliferation of digital content.

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