A two-fold classification for composite decision about localized arm movement from EEG by SVM and QDA techniques

Anwesha Khasnobish, Saugat Bhattacharyya, Amit Konar, D. N. Tibarewala, Atulya K. Nagar

Research output: Chapter in Book/Report/Conference proceedingConference contribution

20 Citations (Scopus)
2 Downloads (Pure)

Abstract

Disabled people now expect better quality of life with the development of brain computer interfaces (BCIs) and neuroprosthetics. EEG (electroencephalograph) based BCI research for robot arm control mainly concentrates on distinguishing the left/right arm movement. But for controlling artificial arm in real life scenario with greater degrees of freedom, it is essential to classify the left/right arm movement further into different joint movements. In this paper we have classified the raw EEG signal for left and right hand movement, followed by further classification of each hand movement into elbow, finger and shoulder movements. From the two electrodes of interest, namely, C3 and C4, wavelet coefficients, power spectral density (PSD) estimates for the alpha and beta bands and their corresponding powers were selected as the features for this study. These features are further fed into the quadratic discriminant analysis (QDA), linear support vector machine (LSVM) and radial basis function kernelized support vector machine (RSVM) to classify into the intended classes. For left-right hand movement, the maximum classification accuracy of 87.50% is obtained using wavelet coefficient for RSVM classifier. For the multi-class classification, i.e., Finger-Elbow-Shoulder classification the maximum classification accuracy of 80.11% for elbow, 93.26% for finger and 81.12% for shoulder is obtained using the features obtained from power spectral density for RSVM classifier. The results presented in this paper indicates that elbow-finger-shoulder movement can be successfully classified using the given set of features.

Original languageEnglish
Title of host publication2011 International Joint Conference on Neural Networks, IJCNN 2011 - Final Program
Pages1344-1351
Number of pages8
DOIs
Publication statusPublished - 24 Oct 2011
Event2011 International Joint Conference on Neural Network, IJCNN 2011 - San Jose, CA, United States
Duration: 31 Jul 20115 Aug 2011

Publication series

NameProceedings of the International Joint Conference on Neural Networks

Conference

Conference2011 International Joint Conference on Neural Network, IJCNN 2011
CountryUnited States
CitySan Jose, CA
Period31/07/115/08/11

Keywords

  • BCI
  • EEG
  • LSVM
  • PSD
  • QDA
  • RSVM
  • wavelet transformation

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    Khasnobish, A., Bhattacharyya, S., Konar, A., Tibarewala, D. N., & Nagar, A. K. (2011). A two-fold classification for composite decision about localized arm movement from EEG by SVM and QDA techniques. In 2011 International Joint Conference on Neural Networks, IJCNN 2011 - Final Program (pp. 1344-1351). [6033380] (Proceedings of the International Joint Conference on Neural Networks). https://doi.org/10.1109/IJCNN.2011.6033380