Image analysis – Applications
Reexamination Certificate
2006-07-11
2006-07-11
Wu, Jingge (Department: 2624)
Image analysis
Applications
C713S176000
Reexamination Certificate
active
07076081
ABSTRACT:
Disclosed a method of designing a watermark having the power spectral density optimized so that the detection performance can be improved by employing the whitening filtered detection after the Wiener attack. The power spectral density of the watermark is designed using an optimization method that can improve the entire detection performance by reflecting the gain of the whitening filter after the Wiener attack. A higher detection gain is obtained using the whitening filter after the Wiener attack, and the expected value of the difference between test statistics of the two hypotheses that the watermark exists and the watermark does not exist, respectively, is maximized to optimize the detection performance. Regarding the expected value of the difference between the test statistics as an objective function, the power spectral density of the watermark, which corresponds to a maximum differentiated value of the power spectral density of the watermark using the Lagrange multiplier method, is obtained.
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Hwang Youngha
Kim Myung Joon
Lee Kiryung
Moon Kyung Ae
Electronics and Telecommunications Research Institute
Mayer Brown Rowe & Maw LLP
Tabatabai Abolfazl
Wu Jingge
LandOfFree
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