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The above process enables the LSB to carry the watermark information. The watermark can be decoded by comparing the LSB bit pattern with a stored counterpart. The watermark message can be carried by the choice of sequence (or its complement) and its phasing. A schematic equivalent of the decoder is shown in Fig.1.
years 1990 and 1993. For more information about U.S. currency visit www.uscurrency.gov. Security Thread . Hold the note to light to see an embedded thread running vertically to the left of the portrait. The thread . is imprinted with the letters USA and the numeral 100 in an alternating pattern and is visible from both sides of the note.
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Back Issues The Watermark: 1993-present. Howth Castle: 1985-1993. wavelength: 1979-1984
By Series 1993, the features appeared on all denominations except $1 and $2 notes. SEE FULL HISTORY TIMELINE. 1996. ... The new-design $100 note also includes a portrait watermark of Benjamin Franklin that is visible from both sides of the note when held to light. SEE FULL HISTORY TIMELINE. Previous slide Next slide. Featured.
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The watermark is capable of carrying such information as authentication or authorisation codes, or even a legend essential for image interpretation. This capability is envisaged to find application in image tagging, copyright enforcement, counterfeit protection, and controlled access to image data.
