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Comparison of few wavelets to filter ocular artifacts in EEG using lifting wavelet transform

Salwani, M. D. and Jasmy, Y. (2005) Comparison of few wavelets to filter ocular artifacts in EEG using lifting wavelet transform. In: TENCON 2005 - 2005 IEEE Region 10 Conference, 21 November 2005 - 24 November 2005, Melbourne, VIC, Australia.

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Official URL: http://dx.doi.org/10.1109/TENCON.2005.301044


We proposed a technique to remove ocular artifact (OA) from electroencephalogram (EEG) using Lifting Wavelet Transform (LWT). The objectives of OA filtering are threefold 1) to reduce the OA magnitude, 2) to retain the neural EEG potentials and 3) to make corrections at the right time localization. Three basic steps involved are to transform the EEG, hard thresholding the wavelet coefficients and the corrected EEG is obtained by inverse transform these threshold coefficients.It is of paramount important to select a suitable wavelet and threshold to accomplish this task. In this investigation, few wavelets were used and their effectiveness performances were compared visually. A level-dependent threshold used was suitable for both blinking and eyeball movements' corrections. From this study, we concluded that Haar and rbio3.1 outperformed db4 and cdf4.4 wavelets, and had achieved the objectives of OA removal.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:EEG, lifting wavelet transform, ocular artifacts, threshold
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:Electrical Engineering
ID Code:29758
Deposited By: Yanti Mohd Shah
Deposited On:26 Mar 2013 00:08
Last Modified:31 Jan 2022 08:41

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