Secure robust high-fidelity watermarking
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United States of America Patent
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Nov 20, 2007
Grant Date -
Jan 30, 2003
app pub date -
Apr 18, 2002
filing date -
Jul 30, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
For each small image region (in space and time), a measure of perceptual transparence of each of a set of possible watermark carrier modulations is used to choose a subset of such modulations, from which a secure random number generator selects, for each image region, a single carrier, modulations of which carry the watermark data.
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