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

Table 6

Mean absolute error (MAE) and mean absolute percentage error (MAPE) values in delta 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	0.613	9.249	0.399	7.721	0.319	6.774	0.332	6.750	0.329	6.734
5	0.544	5.858	0.331	4.517	0.250	3.400	0.263	3.575	0.260	3.547
6	0.539	5.968	0.327	4.013	0.245	2.816	0.258	3.053	0.255	3.027
7	0.539	6.061	0.329	4.068	0.245	2.787	0.258	3.014	0.256	2.977
8	0.539	6.080	0.335	4.150	0.247	2.828	0.258	3.045	0.256	3.010
9	0.538	6.082	0.340	4.206	0.248	2.847	0.257	3.055	0.256	3.021
10	0.538	6.080	0.344	4.248	0.249	2.857	0.257	3.058	0.256	3.024
12	0.538	6.077	0.349	4.290	0.251	2.865	0.257	3.060	0.255	3.027
15	0.538	6.076	0.351	4.312	0.251	2.870	0.257	3.060	0.255	3.028
20	0.538	6.077	0.352	4.326	0.251	2.872	0.257	3.060	0.255	3.028
25	0.538	6.078	0.352	4.333	0.251	2.874	0.257	3.060	0.255	3.028
35	0.538	6.078	0.353	4.340	0.251	2.875	0.257	3.061	0.255	3.029
Unfiltered	0.538	6.083	0.353	4.392	0.251	2.889	0.257	3.059	0.255	3.027