Classifying EEG for Brain Computer Interfaces Using Gaussian Process

Mingjun Zhong (1) , Fabien Lotte (1) , Mark Girolami (2) , Anatole Lécuyer (1)

1 BUNRAKU - Perception, decision and action of real and virtual humans in virtual environments and impact on real environments
2 School of Computing Science [Glasgow]

Classifying electroencephalography (EEG) signals is an important step for proceeding EEG-based brain computer interfaces (BCI). Currently, kernel based methods such as the support vector machine (SVM) are considered the state-of-the-art methods for this problem. In this paper, we apply Gaussian process (GP) classification to binary discrimination of motor imagery EEG data. Compared with the SVM, GP based methods naturally provide probability outputs for identifying a trusted prediction which can be used for post-processing in a BCI. Experimental results show that the classification methods based on a GP perform similarly to kernel logistic regression and probabilistic SVM in terms of predictive likelihood, but outperform SVM and K-nearest neighbor (KNN) in terms of 0–1 loss class prediction error.

Mots clés: brain-computer interface; EEG; classification; motor imagery; gaussian process; support vector machine

Domaines: Intelligence artificielle [cs.AI]; Biotechnologie; Biotechnologies; Apprentissage [cs.LG]

Mingjun Zhong, Fabien Lotte, Mark Girolami, Anatole Lécuyer. Classifying EEG for Brain Computer Interfaces Using Gaussian Process. Pattern Recognition Letters, 2008, 29 (3), pp.354-359. ⟨inria-00134966v3⟩