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 ?
Finally, the color image reconstruction is applied on modified RGB channels to get watermarked color image IW.
PSNR is a better test to check distortions between original image and watermarked image because it uses mean squared error also.
A watermarked data may undergo certain types of attacks before being reached to the detector or extractor.
It is through the integrity of the extracted watermark that we can tell whether the watermarked image has been changed or manipulated.
where MSE is the mean square error between the original image and the watermarked image, and MAXI is the maximum pixel value of the image which is equal to 255 in our implementations since pixels were represented using 8 bits per sample.
Distribution not only involves distributing the watermarked content but also highlights the issues of the usage model: how the content owner wants users to use the marked content and what capabilities he or she is willing to provide those users.
The resultant watermarked primary watermark image (obtain from the previous sub-section) is the watermark for the host image and it is used for the following embedding algorithm.
Standard watermarking [ILLUSTRATION FOR FIGURE 5a OMITTED] involves the creation of a watermarked image by encoding a signature into an original image.
The scientists tested robustness by extracting the watermarked information from DV and VHS camcorder copies of the clips, and from highly compressed versions of these camcorder captures.
The benefit of the SDK to Digimarc customers is that images can be digitally watermarked with copyright notification and image tracking attributes that provide a pervasive link back to the original image management database, even after the images are outside the original system.
We're pleased to announce that, as part of its corporate citizenship program, Digimarc has donated digital watermarking technology to enable Net Nanny and RuleSpace to augment their respective content recognition capabilities with the ability help identify and manage access to digitally watermarked content that may be flagged as inappropriate for children," said Reed Stager, vice president and general manager, Digimarc Global Licensing.
With Digimarc ImageBridge Plus watermarking, Stockbyte will embed its digital images with imperceptible digital data that will link viewers directly to a specific Internet destination when the watermarked image is opened or scanned with a Digimarc-enabled application or free stand-alone readers.