0 a mark made in some types of paper during its production that can only be seen if it is held against the light
1 a mark showing the highest or lowest level that a river or the sea reaches
2 a mark made on some types of paper, especially paper money, that is only seen if it is held against the light, and that is used to stop illegal copies being made:
3 a pattern that is added to photographs, films, and sound files to show who owns the information:
4 an image behind the main text of a computer document, for example, in official company documents or in documents used when giving a talk:
A watermark is more transparent than a background and is often used as a way to display company logos during a presentation.
5 a particular level or value for an investment, used to measure its performance:
Fund managers need to have a watermark to reach in each analysed investment spell.
6 the highest level reached by an investment in a particular period:
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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