Media signal filtering for use in digital watermark reading

Details Media signal filtering for use in digital watermark reading Media signal filtering for use in digital watermark reading

2006-07-11

2006-07-11

Johns, Andrew W. (Department: 2621)

Image analysis

Applications

C382S260000

Reexamination Certificate

active

07076082

ABSTRACT:
A curve fitting method is used to synchronize a reader of embedded data in a media signal. A circular reference signal is embedded in the media signal. After geometric distortion of the media signal, the reference signal is distorted, yet still detectable. The amount of distortion is derived by detecting the reference signal, and applying a curve fitting method from which the distortion is calculated.

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