Image analysis – Applications
Reexamination Certificate
2005-04-19
2005-04-19
Johns, Andrew W. (Department: 2621)
Image analysis
Applications
Reexamination Certificate
active
06882737
ABSTRACT:
The present invention relates to digital watermarks integrated into holograms, watermarked hologram structures, and related applications as an authentication technique. One method creates a watermark image, and then embeds the watermark image into a holographic structure. The holographic structure is carried by a smart card. The smart card includes additional information. In one embodiment, the digital watermark includes information bits, and these information bits are used to authenticate the hologram, or the smart card. In another embodiment, the watermark's information bits are compared with the additional information carried by the smart card. The result of the comparison is used to authenticate the smart card or the hologram.
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Brunk Hugh L.
Carr J. Scott
Decker Stephen K.
Lofgren Neil E.
Digimarc Corporation
Digimarc Corporation
Johns Andrew W.
Nakhjavan Shervin
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