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New Detectors for Watermarks with Unknown Power Based on Student-t Image Priors | IEEE Conference Publication | IEEE Xplore

New Detectors for Watermarks with Unknown Power Based on Student-t Image Priors


Abstract:

In this paper we present new detectors for additive watermarks when the power of the watermark is unknown. These detectors are based on modeling the image using student-t...Show More

Abstract:

In this paper we present new detectors for additive watermarks when the power of the watermark is unknown. These detectors are based on modeling the image using student-t statistics. As a result, due to the generative properties of the student-t density function, such models are spatially adaptive and the Expectation-Maximization algorithm can be used to obtain maximum likelihood estimates of their parameters. Using these image models detectors based on the generalized likelihood ratio and Rao tests are derived for this problem. Numerical experiments are presented that demonstrate the properties of these detectors and compared them with previously proposed detectors.
Date of Conference: 01-03 October 2007
Date Added to IEEE Xplore: 02 January 2008
ISBN Information:
Conference Location: Chania, Greece

References

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