Feature-based watermarks and watermark detection strategies
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United States of America Patent
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Mar 28, 2006
Grant Date -
Nov 1, 2001
app pub date -
Mar 16, 2001
filing date -
Mar 18, 2000
priority date (Note) -
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Abstract
Processes and apparatus for improving the state of the art for watermarking and data protection. The disclosure includes feature-based watermarks, auto- and cross-correlation techniques for determining scaling and rotation, transitions in time based watermarking, autocorrelation watermarks for images, and dynamic content scrambling of static files.
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