watermark
Speech parts
1. watermark - Noun
2. watermark - Verb
Meaning
A mark indicating the height to which water has risen, or at which it has stood; the usual limit of high or low water.
A letter, device, or the like, wrought into paper during the process of manufacture.
See Water line, 2.
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Examples
A few mechanical devices are also used by collectors to detect watermarks on stamps such as the Morley-Bright watermark detector and the more expensive Safe Signoscope.
Cartographic errors Some maps contain deliberate errors or distortions, either as propaganda or as a " watermark " to help the copyright owner identify infringement if the error appears in competitors' maps.
A watermark is very useful in the examination of paper because it can be used for dating, identifying sizes, mill trademarks and locations, and determining the quality of a sheet of paper.
Cylinder mould process Another type of watermark is called the cylinder mould watermark.
A client device equipped with a digital camera, such as a PDA or cell phone, captures a digital image of a watermarked object, and pre-filters the image to isolate a portion of the image data suspected of containing a digital watermark.
A fragile watermark is embedded in a document.