Effect of EOG Signal Filtering on the Removal of Ocular Artifacts and EEG-Based Brain-Computer Interface: A Comprehensive Study

Table 9

Mean absolute error (MAE) and mean absolute percentage error (MAPE) values in beta frequency band (mean of all EEG channels and mean of all simulated subjects).

Low-pass EOG filter (Hz)	Simple		Adaptive filtering				Hybrid methods
	Regression		LMS		RLS		REGICA		AIR
	MAE	MAPE	MAE	MAPE	MAE	MAPE	MAE	MAPE	MAE	MAPE
4	0.007	1.018	0.007	1.122	0.005	0.794	0.005	0.679	0.005	0.676
5	0.007	0.959	0.006	1.039	0.005	0.703	0.004	0.573	0.004	0.573
6	0.007	0.938	0.006	0.982	0.004	0.646	0.003	0.510	0.003	0.506
7	0.007	0.944	0.006	0.961	0.004	0.637	0.003	0.491	0.003	0.486
8	0.007	1.003	0.006	0.987	0.004	0.678	0.003	0.519	0.003	0.512
9	0.007	1.128	0.007	1.074	0.005	0.768	0.004	0.595	0.004	0.588
10	0.009	1.367	0.008	1.228	0.007	0.930	0.006	0.790	0.006	0.784
12	0.016	2.410	0.016	2.336	0.014	2.057	0.013	1.917	0.013	1.916
15	0.034	5.027	0.034	5.208	0.033	4.925	0.031	4.719	0.031	4.725
20	0.066	10.752	0.067	11.173	0.065	10.705	0.062	10.381	0.062	10.405
25	0.094	15.951	0.095	16.437	0.092	15.767	0.089	15.289	0.089	15.324
35	0.122	18.770	0.124	19.315	0.121	18.521	0.117	17.945	0.117	17.996
Unfiltered	0.127	19.029	0.129	19.581	0.125	18.771	0.121	18.184	0.122	18.237