Watermark

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Watermark

An image in a piece of paper that may be seen more clearly when it is held up to light. This is used in printing some money and passports to prevent counterfeiting. For example, if one holds a $20 American bill up to light, one would see a watermark of Andrew Jackson's face.
References in periodicals archive ?
The digital watermarking algorithms based on the type of host medium are divided into image watermarking, video watermarking, audio watermarking and text watermarking [21].
It is evident that both encryption and digital watermarking are complementing technologies and are required as a complete security solution for multimedia data.
Traditional watermarking algorithms modify the contents of the digital medium to be protected by embedding a watermark.
The above watermarking requirements are conflicting with each other.
Corel case is not struck down, fragile watermarking may be the only way to ensure that uncontrolled use of digital files does not result in a proliferation of inaccurate and unauthentic images on the World Wide Web.
With the support of MusicTrace's Watermarking CoreMedia emphasizes its leading position for interoperable, people-centric content technology", said Willms Buhse, Executive Director CoreMedia.
In this paper, we propose a non-blind, imperceptible and robust watermarking technique based on cascading two powerful mathematical transforms; the Discrete Wavelet Transform (DWT), and the Singular Value Decomposition (SVD).
On the other hand, understanding the limitations and inadequacies of watermarking schemes paves the way toward engineering more comprehensive and effective solutions in the long run and, in the process, ensures that digital watermarks are available for years to come.
The paper describes how embedding, detecting and responding to watermarks can work to identify digitally distributed content in order to enable effective monitoring, media serialization and management of copyrighted content," added Digital Watermarking Alliance Chairman Reed Stager.
9] presented a dual watermarking scheme which is the combination of visible and invisible watermarking scheme.
Digital watermarking differs from digital fingerprinting, which produces a "meta" file that describes the contents of the source file.