Computing distortion of media signals using embedded data with repetitive structure and log-polar mapping
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United States of America Patent
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May 5, 2009
Grant Date -
Apr 26, 2007
app pub date -
Dec 19, 2006
filing date -
Aug 15, 2002
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Abstract
A digital watermark detection method uses a matched filtering technique on a log polar re-mapping of a watermarked signal to detect peaks associated with a repetitive structure of a watermark.
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