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(a) Feature extraction distribution across architectures. (b) The accuracy obtained for each feature. Note that bar “Other” grouped the following features extracted by Selective Attention Mechanism (SAM), Optical Flow from the EEG video, 425 silent physiological features from the 7 signals, and Hilbert–Huang spectrum (HHS), High-level features, Linear domain features (Autoregressive coefficient), and Non-Linear domain features (Approximate entropy, Hurst Exponent).
