High Performance Multi-class Motor Imagery EEG Classification

Gul Hameed Khan, M. Asim Hashmi, Mian M. Awais, Nadeem A. Khan, Rushda Basir

2020

Abstract

Use of Motor Imagery (MI) in Electroencephalography (EEG) for real-life Brain Computer Interface applications require high performance algorithms that are both accurate as well as less computationally intensive. Common Spatial Pattern (CSP) and Filter Bank Common Spatial Pattern (FBSP) based methods of feature extraction for MI-classification has been shown very promising. In this paper we have advanced this frontier to present a new efficient approach whose variants out compete in accuracy (in terms of kappa values) with the existing approaches with the same or smaller feature set. We have demonstrated that use of one mu band and three beta sub-bands is very ideal both from the point-of-view of accuracy as well as computational complexity. We have been able to achieve the best reported kappa value of 0.67 for Dataset 2a of BCI Competition IV using our approach with a feature vector of length 64 directly composed out of FBCSP transformed data samples without the need of further feature selection. The feature vector of size 32 directly composed from FBCSP data is enough to outcompete existing approaches with regard to kappa value achievement. In this paper we also have systematically reported experiments with different classifiers including kNN, SVM, LDA, Ensemble, ANN and ANFIS and different lengths of feature vectors. SVM has been reported as the best classifier followed by the LDA.

Paper Citation

in Harvard Style

Khan G., Hashmi M., Awais M., Khan N. and Basir R. (2020). High Performance Multi-class Motor Imagery EEG Classification. In Proceedings of the 13th International Joint Conference on Biomedical Engineering Systems and Technologies (BIOSTEC 2020) - Volume 4: BIOSIGNALS; ISBN 978-989-758-398-8, SciTePress, pages 149-155. DOI: 10.5220/0008864501490155

in Bibtex Style

@conference{biosignals20,
author={Gul Hameed Khan and M. Asim Hashmi and Mian M. Awais and Nadeem A. Khan and Rushda Basir},
title={High Performance Multi-class Motor Imagery EEG Classification},
booktitle={Proceedings of the 13th International Joint Conference on Biomedical Engineering Systems and Technologies (BIOSTEC 2020) - Volume 4: BIOSIGNALS},
year={2020},
pages={149-155},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0008864501490155},
isbn={978-989-758-398-8},
}

in EndNote Style

TY - CONF

JO - Proceedings of the 13th International Joint Conference on Biomedical Engineering Systems and Technologies (BIOSTEC 2020) - Volume 4: BIOSIGNALS
TI - High Performance Multi-class Motor Imagery EEG Classification
SN - 978-989-758-398-8
AU - Khan G.
AU - Hashmi M.
AU - Awais M.
AU - Khan N.
AU - Basir R.
PY - 2020
SP - 149
EP - 155
DO - 10.5220/0008864501490155
PB - SciTePress