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• W2770341796 abstract "Feature extraction is an important step in the process of electroencephalogram (EEG) signal classification. The authors propose a ‘pattern recognition’ approach that discriminates EEG signals recorded during different cognitive conditions. Wavelet based feature extraction such as multi-resolution decompositions into detailed and approximate coefficients as well as relative wavelet energy were computed. Extracted relative wavelet energy features were normalized to zero mean and unit variance and then optimized using Fisher’s discriminant ratio (FDR) and principal component analysis (PCA). A high density EEG dataset validated the proposed method (128-channels) by identifying two classifications: (1) EEG signals recorded during complex cognitive tasks using Raven’s Advance Progressive Metric (RAPM) test; (2) EEG signals recorded during a baseline task (eyes open). Classifiers such as K-nearest neighbors (KNN), Support Vector Machine (SVM), Multi-layer Perceptron (MLP) and Naïve Bayes (NB) were then employed. Outcomes yielded 99.11% accuracy via SVM classifier for coefficient approximations (A5) of low frequencies ranging from 0 to 3.90 Hz. Accuracy rates for detailed coefficients were 98.57 and 98.39 % for SVM and KNN, respectively; and for detailed coefficients (D5) deriving from the sub-band range (3.90 to 7.81 Hz). Accuracy rates for MLP and Naïve Bayes classifiers were comparable at 97.11–89.63% and 91.60–81.07% for A5 and D5 coefficients, respectively. In addition, the proposed approach was also applied on public dataset for classification of two cognitive tasks and achieved comparable classification results, i.e., 93.33% accuracy with KNN. The proposed scheme yielded significantly higher classification performances using machine learning classifiers compared to extant quantitative feature extraction. These results suggest the proposed feature extraction method reliably classifies EEG signals recorded during cognitive tasks with a higher degree of accuracy." @default.
• W2770341796 created "2017-12-04" @default.
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• W2770341796 date "2017-11-21" @default.
• W2770341796 modified "2023-10-16" @default.
• W2770341796 title "Classification of EEG Signals Based on Pattern Recognition Approach" @default.
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• W2770341796 doi "https://doi.org/10.3389/fncom.2017.00103" @default.
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