Watermarking of data invariant to distortion
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United States of America Patent
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Jan 17, 2012
Grant Date -
Oct 7, 2010
app pub date -
Oct 6, 2009
filing date -
Dec 13, 2001
priority date (Note) -
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Abstract
A data set is transformed to a domain in which values are robust to distortion. The values are then expanded to carry auxiliary data. To recover the data, the data set is transformed into the domain, further transformed to get a set of possibly expanded data, and then processed to extract auxiliary data from the expanded values.
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