Watermark

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Watermark

An image in a piece of paper that may be seen more clearly when it is held up to light. This is used in printing some money and passports to prevent counterfeiting. For example, if one holds a $20 American bill up to light, one would see a watermark of Andrew Jackson's face.
References in periodicals archive ?
The procedure of detecting watermarks is the reverse procedure of generating watermarks.
So far uMark had been available only for the Windows platform, now with the launch of uMark for Mac, even Mac users would be able to use it to watermark and protect their photographs.
Measurements of the watermark intensity and sharpness relative to a reference correlated well with the results of visual testing.
Digital watermarks are in extensive use around the world, with billions of digitally watermarked objects in use for broadcast monitoring and copy protection.
The watermark is usually a random number sequence, copyright messages, ownership identifier, or control signal identifying the ownership information (Cox et al.
After these attacks on the watermarked image, the extracted watermarks are compared with the original one.
Distributed systems for registering watermarked content and responding to requests triggered by watermark detection; U.
Digimarc Corporation (NASDAQ: DMRC) today announced the Nebraska Department of Motor Vehicles (DMV) is leading the fight against fake IDs and related safety issues by equipping DMV offices around the State with the ability to inspect and authenticate driver licenses secured with Digimarc(R) IDMarc(TM) digital watermarks.
As digital watermarks do not disrupt the images to which they are applied, this offers unlimited application and marketing possibilities, particularly with those companies that are sensitive to maintaining their brand images.