Image analysis – Applications
Reexamination Certificate
2005-09-20
2005-09-20
Ahmed, Samir (Department: 2623)
Image analysis
Applications
C725S020000
Reexamination Certificate
active
06947573
ABSTRACT:
A method and an arrangement for detecting a multi-bit watermark in a signal (e.g. a video image) are disclosed. Each bit of the multi-bit value is represented by an embedded watermark subpattern in the signal. Instead of detecting in a conventional manner the presence of each individual subpattern (i.e. detecting each individual bit), the detection comprises the steps of: detecting (24,23) the presence of the full watermark in the signal irrespective of its multi-bit value, and detecting (25) to which extent the presence of subpatterns corresponds with the multi-bit value to be checked. The reliability of watermark detection is hereby improved.
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Ahmed Samir
Koninklijke Philips Electronics , N.V.
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