Automated Diagnosis of Epilepsy Using Key-Point-Based Local Binary Pattern of EEG Signals

• Published in: IEEE journal of biomedical and health informatics 2017-07, Vol.21 (4), p.888-896
• Main Authors: Tiwari, Ashwani Kumar, Pachori, Ram Bilas, Kanhangad, Vivek, Panigrahi, Bijaya Ketan
• Format: Article
• Language: English
• Subjects: Artificial neural networks; Automation; Classification; Computation; Computer-assisted diagnosis; Databases, Factual; Diagnosis; Diagnosis, Computer-Assisted - methods; EEG; Electroencephalography; Electroencephalography - methods; Epilepsy; Epilepsy - diagnosis; Feature extraction; Histograms; Humans; Informatics; local binary pattern (LBP); Medical diagnosis; Methodology; Seizing; Seizures; Signal Processing, Computer-Assisted; Sons; Support Vector Machine; support vector machine (SVM) classifier; Support vector machines
• ISSN: 2168-2194; 2168-2208
• DOI: 10.1109/JBHI.2016.2589971

The electroencephalogram (EEG) signals are commonly used for diagnosis of epilepsy. In this paper, we present a new methodology for EEG-based automated diagnosis of epilepsy. Our method involves detection of key points at multiple scales in EEG signals using a pyramid of difference of Gaussian filtered signals. Local binary patterns (LBPs) are computed at these key points and the histogram of these patterns are considered as the feature set, which is fed to the support vector machine (SVM) for the classification of EEG signals. The proposed methodology has been investigated for the four well-known classification problems namely, 1) normal and epileptic seizure, 2) epileptic seizure and seizure free, 3) normal, epileptic seizure, and seizure free, and 4) epileptic seizure and nonseizure EEG signals using publically available university of Bonn EEG database. Our experimental results in terms of classification accuracies have been compared with existing methods for the classification of the aforementioned problems. Further, performance evaluation on another EEG dataset shows that our approach is effective for classification of seizure and seizure-free EEG signals. The proposed methodology based on the LBP computed at key points is simple and easy to implement for real-time epileptic seizure detection.