Single-Trial Classification of Multi-User P300-Based Brain-Computer Interface Using Riemannian Geometry

Louis Korczowski 1 Marco Congedo 1 Christian Jutten 1
1 GIPSA-VIBS - VIBS
GIPSA-DIS - Département Images et Signal
Abstract : The classification of electroencephalographic (EEG) data recorded from multiple users simultaneously is an important challenge in the field of Brain-Computer Interface (BCI). In this paper we compare different approaches for classification of single-trials Event-Related Potential (ERP) on two subjects playing a collaborative BCI game. The minimum distance to mean (MDM) classifier in a Riemannian framework is extended to use the diversity of the inter-subjects spatio-temporal statistics (MDM-hyper) or to merge multiple classifiers (MDM-multi). We show that both these classifiers outperform significantly the mean performance of the two users and analogous classifiers based on the step-wise linear discriminant analysis. More importantly, the MDM-multi outperforms the performance of the best player within the pair.
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Louis Korczowski, Marco Congedo, Christian Jutten. Single-Trial Classification of Multi-User P300-Based Brain-Computer Interface Using Riemannian Geometry. 37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBS), Aug 2015, Milan, Italy. ⟨10.1109/EMBC.2015.7318721⟩. ⟨hal-01191913⟩

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