Extracting embedded information from digital image data
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United States of America Patent
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Apr 17, 2007
Issued Date -
N/A
app pub date -
Sep 3, 2004
filing date -
Jan 30, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention extracts third information, which includes first and second information, from image data. The first information (e.g., copyright information) is embedded in the image data using a public embedding method, and the second information (e.g., information used to detect if the copyright has been altered) is embedded in the image data using a private embedding method. The first information is then extracted from the third information using the second information.
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