Sparse representation-based classification scheme for motor imagery-based brain-computer interface systems

Motor imagery (MI)-based brain-computer interface systems (BCIs) normally use a powerful spatial filtering and classification method to maximize their performance. The common spatial pattern (CSP) algorithm is a widely used spatial filtering method for MI-based BCIs. In this work, we propose a new s...

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Veröffentlicht in:Journal of neural engineering Jg. 9; H. 5; S. 056002
Hauptverfasser: Shin, Younghak, Lee, Seungchan, Lee, Junho, Lee, Heung-No
Format: Journal Article
Sprache:Englisch
Veröffentlicht: England 01.10.2012
Schlagworte:
Brain-Computer Interfaces - classification
Databases, Factual
Electroencephalography - methods
Evoked Potentials, Motor - physiology
Humans
Imagination - physiology
ISSN:1741-2552, 1741-2552
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Zusammenfassung:Motor imagery (MI)-based brain-computer interface systems (BCIs) normally use a powerful spatial filtering and classification method to maximize their performance. The common spatial pattern (CSP) algorithm is a widely used spatial filtering method for MI-based BCIs. In this work, we propose a new sparse representation-based classification (SRC) scheme for MI-based BCI applications. Sensorimotor rhythms are extracted from electroencephalograms and used for classification. The proposed SRC method utilizes the frequency band power and CSP algorithm to extract features for classification. We analyzed the performance of the new method using experimental datasets. The results showed that the SRC scheme provides highly accurate classification results, which were better than those obtained using the well-known linear discriminant analysis classification method. The enhancement of the proposed method in terms of the classification accuracy was verified using cross-validation and a statistical paired t-test (p < 0.001).
Bibliographie:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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ISSN:1741-2552
1741-2552
DOI:10.1088/1741-2560/9/5/056002