Please use this identifier to cite or link to this item: https://elibrary.tucl.edu.np/handle/123456789/7294
Title: A 3-channel Active Electrode EEG Device for the Classification of MotorImagery Brain waves for Brain Computer Interface
Authors: Bista, Saroj
Keywords: LDA;Morlet;Wavelet Decomposition;ICA
Issue Date: Nov-2017
Publisher: Pulchowk Campus
Institute Name: Institute of Engineering
Level: Masters
Abstract: Thisthesisworkpresentsacosteffectivemethodtorecordbrainwavesignalsusing threechannelactiveelectrodeEEGdeviceandclassifybrainwavesrelatedtomotor imagery(MI)leftandrighthandmovement,basedonelectroencephalography(EEG) measuredfromthecentrallobe,thatcouldbeusedfortheBrainComputerInterface (BCI)systems.ThegoalofthisthesisistouseIndependentComponentAnalysis (ICA)fortheremovalofEEGartifacts,andthenextractthebrainwavesfeaturesforMI lefthandandMIrighthandmovementusingWaveletDecomposition(WD).The‘Mor- let’motherwaveletisusedforwaveletdecompositionasitshowsbetterperformance foranalysisofnon-stationarybiomedicalsignalslikeEEG.Thebrainwavefeatureslike MaximumPoweramongalldecompositionlevel(MMP),Frequencycorrespondingto MMP(MAF),andMaximumAmplitudeofthesignalwithMAF(MMA)ischosen astheclassificationfeaturesfortheclassificationofMIbrainwaves.Theclassifica-tionofMIbrainwavesignalsisdoneusingLinearDiscriminantAnalysis(LDA)which showedtheaccuracyof81.6%.Thus,thedesignedthreechannelactiveelectrodeEEG deviceusedshowedgoodperformanceforrecordingEEGsignals.Furthermore,signal preprocessingalgorithmICA,featureextractionmethodWaveletDecomposition,and classificationmethodLDAshowedgoodperformancefortheclassificationofMIleft handandMIrighthandactivities.
Description: This thesis work presents a cost effective method to record brain wave signals using three channel active electrode EEG device and classify brain waves related to motor imagery(MI) left and right hand movement, based on electroencephalography (EEG) measured from the central lobe ,that could be used for the Brain Computer Interface (BCI) systems.
URI: https://elibrary.tucl.edu.np/handle/123456789/7294
Appears in Collections:Computer Engineering

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