Epileptic Seizure Classification of EEGs Using Time-Frequency Analysis Based Multiscale Radial Basis Functions
| Autor: | Mei-Lin Luo, Xiao-Feng Yang, Qi Guo, Ke Li, Yang Li, Xudong Wang |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Support Vector Machine
Databases Factual Computer science Speech recognition Feature extraction 02 engineering and technology Electroencephalography 03 medical and health sciences 0302 clinical medicine Health Information Management Discriminative model Seizures 0202 electrical engineering electronic engineering information engineering medicine Humans Radial basis function Electrical and Electronic Engineering medicine.diagnostic_test business.industry Pattern recognition Signal Processing Computer-Assisted Linear discriminant analysis Computer Science Applications Time–frequency analysis Support vector machine 020201 artificial intelligence & image processing Epileptic seizure Artificial intelligence medicine.symptom business 030217 neurology & neurosurgery Algorithms Biotechnology |
| Zdroj: | IEEE journal of biomedical and health informatics. 22(2) |
| ISSN: | 2168-2208 |
| Popis: | The automatic detection of epileptic seizures from electroencephalography (EEG) signals is crucial for the localization and classification of epileptic seizure activity. However, seizure processes are typically dynamic and nonstationary, and thus, distinguishing rhythmic discharges from nonstationary processes is one of the challenging problems. In this paper, an adaptive and localized time–frequency representation in EEG signals is proposed by means of multiscale radial basis functions (MRBF) and a modified particle swarm optimization (MPSO) to improve both time and frequency resolution simultaneously, which is a novel MRBF-MPSO framework of the time–frequency feature extraction for epileptic EEG signals. The dimensionality of extracted features can be greatly reduced by the principle component analysis algorithm before the most discriminative features selected are fed into a support vector machine (SVM) classifier with the radial basis function (RBF) in order to separate epileptic seizure from seizure-free EEG signals. The classification performance of the proposed method has been evaluated by using several state-of-art feature extraction algorithms and other five different classifiers like linear discriminant analysis, and logistic regression. The experimental results indicate that the proposed MRBF-MPSO-SVM classification method outperforms competing techniques in terms of classification accuracy, and shows the effectiveness of the proposed method for classification of seizure epochs and seizure-free epochs. |
| Databáze: | OpenAIRE |
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