Roy, Raphaëlle N. and Charbonnier, Sylvie and Bonnet, Stéphane
Detection of mental fatigue using an active BCI inspired signal processing chain.
(2014)
In: World Congress The International Federation of Automatic Control, 24 August 2014 - 29 August 2014 (Cape Town, South Africa).
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(Document in English)
PDF (Author's version) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader 353kB |
Official URL: http://dx.doi.org/10.3182/20140824-6-ZA-1003.00897
Abstract
This paper presents a novel electroencephalography (EEG) signal processing chain designed to classify two levels of mental fatigue that appears after having spent a long time on a tedious task. The decrease in vigilance associated with mental fatigue makes it a dangerous state for operators in charge of complex systems. The processing chain, inspired from active brain computer interface computing, is implemented as follows: the EEG signal is initially filtered in a given frequency band and 15 electrodes out of 32 are then selected using a method based on Riemannian geometry. Next, a spatial filtering step is carried out using 6 common spatial pattern (CSP) filters. Lastly, a binary classification is performed using Fisher’s linear discriminant analysis (FLDA). The features used are the log variance of the 6 CSP filtered signals. The results obtained on 20 healthy volunteers are excellent with 100% of accuracy when the beta band is used. These performances drop to 84% and 68% when the same data are processed with a traditional signal processing chain where fatigue is classified by means of a FLDA classifier fed by the averaged power, or relative power, in the beta band extracted from 15 selected electrodes.
Item Type: | Conference or Workshop Item (Paper) |
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Audience (conference): | International conference proceedings |
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Institution: | French research institutions > Commissariat à l'Energie Atomique et aux énergies alternatives - CEA (FRANCE) French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE) Other partners > Université Grenoble Alpes - UGA (FRANCE) Other partners > Université de Savoie Mont Blanc - USMB (FRANCE) |
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Deposited On: | 12 Sep 2018 11:14 |
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