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AssigneeKoninklijke Phillips Electronics N.V.
InventorsAntonius A. C. M. Kalker, Jaap A. Haitsma, Maurice J. J. J.-B Maes, Geert F. G. Depovere, Johan P. M. G. Linnartz
Estimating the term…
A method and arrangement for detecting a watermark in an information signal. The method may include the steps of computing the correlation (dk) of the watermark (Wi) and the information signal (e.g. an image Q) for a plurality of positions (k) of the watermark with respect to the information signal, and detecting whether at least one of the respective correlation values exceeds a given threshold. The step of detecting may include determining the standard deviation (σd) of the respective correlation values (dk), and setting the threshold to a given multiple (T) of the standard deviation. The multiple (T) is derived form a desired false alarm rate (watermark detected when there is none, or no watermark detected when there is one).
A method of detecting a given watermark (w) in an information signal (q), comprising the steps of:
An arrangement for detecting a given watermark (w) in an information signal (q), comprising:
A detector for detecting a given watermark (w) in an information signal (q), the detector comprising:
Dependencies are inferred from the claim text.