Question

what is a watermark? describe digital watermarking.​

Answer 1

Answer:

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Explanation:

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Answer 2

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Watermark is a more or less transparent image or text that has been applied to a piece of paper, another image to either protect the original image, or to make it harder to copy the item e.g. money watermarks or stamp watermarks.

A digital watermark is a kind of marker covertly embedded in a noise-tolerant signal such as audio, video or image data. It is typically used to identify ownership of the copyright of such signal. ... It is prominently used for tracing copyright infringements and for banknote authentication.

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