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Watermarking
A watermark is a recognizable image or pattern in paper used to determine authenticity. Watermark or watermarking may also refer to: Technology * Digital watermarking, a technique to embed data in digital audio, images or video ** Audio watermark, techniques for embedding hidden information into audio signals * Watermark (data file), a method for ensuring data integrity which combines aspects of data hashing and digital watermarking * Watermark (data synchronization), directory synchronization related programming terminology * Watermarking attack, an attack on disk encryption methods Films * ''Watermark'' (2013 film), a documentary film directed by Jennifer Baichwal and Edward Burtynsky * ''Watermark'' (2003 film), an Australian film directed by Georgina Willis and produced by Kerry Rock. * ''Watermarks'' (film), a 2004 documentary film about the Viennese Hakoah swim team Music * ''Watermark'' (Art Garfunkel album), a 1977 album by Art Garfunkel * ''Watermark'' (Enya alb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Digital Watermarking
A digital watermark is a kind of marker covertly embedded in a noise-tolerant signal such as audio, video or image data.H.T. Sencar, M. Ramkumar and A.N. Akansu: ''Data Hiding Fundamentals and Applications: Content Security in Digital Multimedia''. Academic Press, San Diego, CA, USA, 2004. It is typically used to identify ownership of the copyright of such a signal. Digital watermarking is the process of hiding digital information in a carrier signal; the hidden information should,Ingemar J. Cox: ''Digital watermarking and steganography''. Morgan Kaufmann, Burlington, MA, USA, 2008 but does not need to, contain a relation to the carrier signal. Digital watermarks may be used to verify the authenticity or integrity of the carrier signal or to show the identity of its owners. It is prominently used for tracing copyright infringements and for banknote authentication. Like traditional physical watermarks, digital watermarks are often only perceptible under certain conditions, e.g. af ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |