methods for detecting works based on copying or altering digital materials
pattern of bits inserted into a digital image, audio or video file that identifies the file's copyright information (author, rights, etc)
Digital Watermarking embeds information into digital data in a secret and inconspicuous way. This can be information such as copyright notices and/or other information about ownership of a digital image.
Computer techniques for inseparately imbedding unobtrusive marks or labels as bits in digital text and for detecting or extracting the marks later. Depending on the technique, digital watermarking can prove ownership, control duplication and trace distribution.
Used most commonly for intellectual property protection, a digital watermark can be either visible or invisible. It is usually a company logo, copyright notification or other mark or message that indicated the owner of the digital document.
Digital watermarking is a technique which allows an individual to add hidden copyright notices or other verification messages to digital audio, video, or image signals and documents. Such hidden message is a group of bits describing information pertaining to the signal or to the author of the signal (name, place, etc.). The technique takes its name from watermarking of paper or money as a security measure.
