Fig. 4: Schematic representations of feature extraction for classification (Illustrated with the LTAFDB).
From: mRMEBP: a unified framework for online detection of atrial fibrillation utilizing deep learning
a Histograms depicting α values for nAF and AF beats. b Computation of the Gini difference curve based on various ratio sequence divisions of α. c The variance (σ) histograms for nAF and AF beats, with a localized enlarged subplot at the bottom (LESPB). d The CNSE \(s{h}_{\alpha }^{{\prime\prime} }\) histograms for nAF and AF beats, accompanied by a LESPB. e Histograms illustrating HR sequence for nAF and AF beats. f Histograms showing estimated heart rates (\(\hat{hr}\)) for nAF and AF beats. g The CNSE \(s{h}_{{\rm{HR}}}^{{\prime\prime} 1}\) histograms for nAF and AF beats, along with a LESPB. h The CNSE \(s{h}_{{\rm{HR}}}^{{\prime\prime} 2}\) histograms for nAF and AF beats, along with a LESPB. See text for abbreviations.
