Method and system for watermark detection
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United States of America Patent
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Nov 7, 2006
Issued Date -
N/A
app pub date -
Feb 13, 2004
filing date -
Aug 30, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A system and method of detecting and authenticating a watermark on a document such as a check which is supposed to include a watermark having known characteristics to verify the authenticity of the document. A digitized image of the document is stored and processed through transformation which generates a frequency distribution. That frequency distribution is processed to determine one or more harmonic compared to a stored value associated with the document to determine that a watermark exists and it is the correct watermark.
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