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231223s2002 xx |||||o 00| ||eng c |
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|a 10.1109/TIP.2002.999676
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|a eng
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|a He, Yun
|e verfasserin
|4 aut
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|a Multiscale signal enhancement
|b beyond the normality and independence assumption
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|c 2002
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|a Date Completed 16.12.2009
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|a Date Revised 04.02.2008
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|a published: Print
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|a Citation Status PubMed-not-MEDLINE
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|a Current approaches to denoising or signal enhancement in a wavelet-based framework have generally relied on the assumption of normally distributed perturbations. In practice, this assumption is often violated and sometimes prior information of the probability distribution of a noise process is not even available. To relax this assumption, we propose a novel nonlinear filtering technique in this paper. The key idea is to project a noisy signal onto a wavelet domain and to suppress wavelet coefficients by a mask derived from curvature extrema in its scale space representation. For a piecewise smooth signal, it can be shown that filtering by this curvature mask is equivalent to preserving the signal pointwise Hölder exponents at the singular points and lifting its smoothness elsewhere
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|a Journal Article
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|a Krim, Hamid
|e verfasserin
|4 aut
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|i Enthalten in
|t IEEE transactions on image processing : a publication of the IEEE Signal Processing Society
|d 1992
|g 11(2002), 4 vom: 15., Seite 423-33
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|x 1941-0042
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| 773 |
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|g volume:11
|g year:2002
|g number:4
|g day:15
|g pages:423-33
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|u http://dx.doi.org/10.1109/TIP.2002.999676
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