Image analysis – Applications – Reading paper currency
Reexamination Certificate
2011-08-30
2011-08-30
Johns, Andrew W (Department: 2624)
Image analysis
Applications
Reading paper currency
C283S085000, C283S902000
Reexamination Certificate
active
08009893
ABSTRACT:
The present invention relates generally to security documents (e.g., banknotes, ID documents, certificates, packaging, etc.). One claim recites a security document including a security pattern provided thereon. The security pattern includes a line structure in which lines width or line spacing is adjusted to convey a predefined, machine-readable pattern in a frequency transform domain. Another claim recites a security document including a security pattern provided thereon. The security pattern is provided in the security document through modifications to a color provided on the security document. The security pattern conveys a predefined, machine-readable pattern in a frequency transform domain. Of course, additional combinations and claims are provided as well.
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Rhoads Geoffrey B.
Rodriguez Tony F.
Digimarc Corporation
Johns Andrew W
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