M変換とウェーブレット縮退を用いる高精度表面計測信号中のインパルス状雑音の除去(機械力学,計測,自動制御)

概要

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The authors propose here a new method for reducing both impulsive noise and white noise by use of M-transform and wavelet shrinkage. M-transform is a new signal transformation proposed by the authors, and any periodic time signal can be considered as the output of a filter whose input is an M-sequence. By using the properties of M-transform, it is shown that both impulsive noise and white noise can be eliminated by use of first M-transform and then wavelet shrinkage. This method is applied well to the signal obtained in Atomic Force Microscope (AFM) signal which sometimes contains many impulsive noise and white noise. From the results of the experiment, it is shown that the proposed method is very efficient for impulsive noise reduction.
社団法人日本機械学会の論文
2007-09-25