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Learning EEG topographical representation for classification via convolutional neural network
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DOI：10.1016/j.patcog.2020.107390.png)
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Abstract
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Electroencephalography (EEG) topographical representation (ETR) can monitor regional brain activities and is emerging as a successful technique for causally exploring cortical mechanisms and connections. However, it is a challenge to find a robust method supporting high-dimensional EEG data with low signal-to-noise ratios from multiple objects and multiple channels. To address this issue, a new ETR energy calculation method for learning the EEG patterns of brain activities using a convolutional neural network is reported. It is able to customize temporal ETR training and recognize multiple objects within a common learning model. Specifically, an open-access dataset from the 2008 Brain-Computer Interface (BCI) Competition IV-2a is used for classification of five classes containing four Motor Imagery actions and one relax action. The proposed classification framework outperforms the best state-of-the-art classification method by 10.11% in average subject accuracy. Furthermore, by studying the ETR parameter optimization, a user interface for BCI applications is obtained and a real-time method implemented. (C) 2020 Elsevier Ltd. All rights reserved.
Keywords:
Motor imagery
Electroencephalography topographical representation
Convolutional neural network
Machine learning
Signal pre-processing
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