Steganographically encoding metallic, shiny or specular surfaces
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United States of America Patent
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Jul 22, 2008
Grant Date -
May 17, 2007
app pub date -
Jan 9, 2007
filing date -
Apr 16, 1998
priority date (Note) -
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Abstract
The present invention provides methods to steganographically mark metallic, shiny and/or specular surfaces. In one implementation, we provide a method including: obtaining auxiliary data; modifying the auxiliary data according to a pseudo-random signal; providing the modified auxiliary data on a specular surface with an ink or dye that provides a pattern comprising at least diffuse reflection. The pattern is provided in a steganographic manner. Other implementations are described and claimed.
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