Entropy-Based Method of Choosing the Decomposition Level in Wavelet Threshold De-noising
نویسندگان
چکیده
منابع مشابه
Entropy-Based Method of Choosing the Decomposition Level in Wavelet Threshold De-noising
In this paper, the energy distributions of various noises following normal, log-normal and Pearson-III distributions are first described quantitatively using the wavelet energy entropy (WEE), and the results are compared and discussed. Then, on the basis of these analytic results, a method for use in choosing the decomposition level (DL) in wavelet threshold de-noising (WTD) is put forward. Fin...
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The existence of noise has great influence on the real features of observed time series, thus noise reduction in time series data is a necessary and significant task in many practical applications. When using traditional de-noising methods, the results often cannot meet the practical needs due to their inherent shortcomings. In the present paper, first a set of key but difficult wavelet de-nois...
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In this paper, the complexities of various noises, which are quantified by wavelet energy entropy (WEE) and differential coefficient of WEE (D(WEE)), were first analyzed and their uncertainties then estimated and described using confidence intervals. Then, quantitative criterion for judging the WEE and D(WEE) difference between noisy series and noise was put forward, based on which the decompos...
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ژورنال
عنوان ژورنال: Entropy
سال: 2010
ISSN: 1099-4300
DOI: 10.3390/e12061499