0 a pattern or picture on paper, especially paper money, which you can only see when a strong light is behind it -- водяной знак
In a series of individual challenges, the participants were given a sample audio piece, with one of the watermarks embedded.
Watermarks were originally used by governments for documents, currency and other applications to help prevent counterfeiting.
In fact, some of those books contained both the identical cross on mounts and identical bull's head watermarks.
He has worked on problems to do with stereo and motion correspondence and multimedia issues of image database retrieval and watermarking.
Since watermarks must be inserted into the video, they only identify copies of the particular video made after that point in time.
Detecting watermarks in a video can indicate the source of an unauthorized copy.
About a year later in 1905, these were replaced by stamps with an overprint in seriffed capitals, and these exist with two different watermarks.
There are no watermarks or limitations, regardless of creation method.
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