Open AccessSeizure Detection in Epileptic EEG Using Short-Time Fourier Transform and Support Vector Machine
Author(s) -
Achmad Rizal,
Wahmisari Priharti,
Sugondo Hadiyoso
Publication year - 2021
Publication title -
international journal of online and biomedical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.184
H-Index - 8
ISSN - 2626-8493
DOI - 10.3991/ijoe.v17i14.25889
Subject(s) - electroencephalography , ictal , short time fourier transform , pattern recognition (psychology) , support vector machine , computer science , artificial intelligence , epileptic seizure , epilepsy , time domain , time–frequency analysis , frequency domain , feature extraction , fast fourier transform , feature (linguistics) , signal (programming language) , speech recognition , fourier transform , mathematics , algorithm , fourier analysis , psychology , neuroscience , computer vision , mathematical analysis , linguistics , philosophy , filter (signal processing) , programming language
Epilepsy is the most common form of neurological disease. The electroencephalogram (EEG) is the main tool in the observation of epilepsy. The detection and prediction of seizures in EEG signals require multi-domain analysis, one of which is the time domain combined with other approaches for feature extraction. In this study, a method for detecting seizures in epileptic EEG is proposed using analysis of the distribution of the signal spectrum in the time range t. The EEG signal which includes normal, inter-ictal and ictal is transformed into the time-frequency domain using the Short-Time Fourier Transform (STFT). Simulations were carried out on varying window length, overlap and FFT points to find the highest detection accuracy. The frequency distribution and first-order statistics were then calculated as feature vectors for the classification process. A support vector machine was employed to evaluate the proposed method. The simulation results showed the highest accuracy of 92.3% using 25-20-512 STFT and quadratic SVM. The proposed method in this study is expected to be a basis for the detection and prediction of seizures in long-term EEG recordings or real-time EEG monitoring of epilepsy patients.