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• W1969580014 abstract "This paper extends weighted median (WM) filters to the class of polynomial weighted median (PWM) filters. Traditional polynomial filtering theory, based on linear combinations of polynomial terms, is able to approximate important classes of nonlinear systems. The linear combination of polynomial terms, however, yields poor performance in environments characterized by heavy tailed distributions. Weighted median filters, in contrast, are well known for their outlier suppression and detail preservation properties. The weighted median sample selection methodology is naturally extended to the polynomial sample case, yielding a filter structure that exploits the higher order statistics of the observed samples while simultaneously being robust to outliers. Moreover, the PWM filter class is well motivated by an analysis of cross and square term statistics. A presented probability density function analysis shows that these terms have heavier tails than the observed samples, indicating that robust combination methods should be utilized to avoid undue influence of outliers. Further analysis shows weighted median processing of polynomial terms is justified from a maximum likelihood perspective. The established PWM filter class is statistically analyzed through the determination of the filter output distribution and breakdown probability. Filter parameter optimization procedures are also presented. Finally, the effectiveness of PWM filters is demonstrated through simulations that include temporal, spectrum, and bispectrum analysis." @default.
• W1969580014 created "2016-06-24" @default.
• W1969580014 creator A5034595132 @default.
• W1969580014 creator A5036946701 @default.
• W1969580014 date "2006-02-01" @default.
• W1969580014 modified "2023-09-26" @default.
• W1969580014 title "Polynomial weighted median filtering" @default.
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• W1969580014 doi "https://doi.org/10.1109/tsp.2005.861750" @default.
• W1969580014 hasPublicationYear "2006" @default.
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