Image analysis – Applications
Reexamination Certificate
2007-12-25
2007-12-25
Johns, Andrew W. (Department: 2624)
Image analysis
Applications
C430S269000
Reexamination Certificate
active
11621839
ABSTRACT:
The present invention relates generally to steganography and data hiding. In one implementation we provide a method including: obtaining auxiliary data; providing a mask for a photo-reactive material, the mask corresponding at least in part to the auxiliary data; and exposing the material through the mask to steganographically impart the auxiliary data in the photo-reactive material. The auxiliary data is machine-readable from the exposed material. In another implementation the material is exposed through photolithographic illumination. Of course, other implementations are described and claimed as well.
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Davis Bruce L.
Rhoads Geoffrey B.
Digimarc Corporation
Johns Andrew W.
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