Table 8.

Feature extraction, feature selection, and classification methods in previous works and the proposed method

Method	Features	Feature selection	Classifier
De Chazal [1]	Morphology, intervals, lead A + B	Feature set wrapper	wLDA
Llamedo [11]	WT, intervals, lead A + B	Wrapper	wLDA
Mar [19]	Morphology, WT, intervals, lead A + B	Wrapper, wLDA	MLP
de Lannoy [20]	Intervals, HOS, lead A + B	Feature set wrapper	wSVM
Doquire [21]	Morphology, intervals, HOS, lead A	Ranking	wSVM
de Lannoy [22]	Morphology, intervals, HOS, lead A	Ranking, wrapper	wCRF + L1
Zhang [23]	Morphology, intervals, lead A + B	Ranking, wrapper	SVM ensemble
Park [24]	HBF, intervals, lead A	-	Hierarchical SVM
Proposed method	Random projections, intervals, lead A	-	SVM + threshold