A Segmental Approach with SWT Technique for Denoising the EOG Signal

Table 1

RMSE values obtained between reference EOG signal and denoised EOG signals by increasing segments approach using SWT technique.

S. number	Segment of the signal (samples)	EOG5 dB; SNR = 39.04 dB	EOG10 dB; SNR = 33.92 dB	EOG15 dB; SNR = 29.02 dB	EOG20 dB; SNR = 24.12 dB	EOG25 dB; SNR = 19.01 dB
		RMSE (µV)	RMSE (µV)	RMSE (µV)	RMSE (µV)	RMSE (µV)
1	1:512	8.38	8.39	8.81	9.78	10.92
2	1:1024	5.94	6.05	6.63	7.52	9.35
3	1:1536	4.88	5.02	5.61	6.71	9.06
4	1:2048	4.25	4.41	5.05	6.25	8.91
5	1:2560	0.91	1.56	2.79	4.61	7.81
6	1:3072	0.94	1.57	2.78	4.60	7.89
7	1:3584	3.48	3.69	4.36	5.77	8.60
8	1:4096	3.27	3.49	4.20	5.60	8.49
9	1:4608	0.92	1.55	2.75	4.59	7.96
10	1:5120	1.46	1.93	2.97	4.73	8.04
11	1:5632	1.34	1.84	2.88	4.68	8.05
12	1:6144	1.38	1.87	2.91	4.70	8.07
13	1:6656	1.39	1.87	2.89	4.68	8.12
14	1:7168	2.03	2.37	3.23	4.95	8.25
15	1:7680	1.97	2.33	3.20	4.91	8.29
16	1:8192	1.53	1.99	2.94	4.79	8.22
Maximum value		8.38	8.39	8.81	9.78	10.92
Minimum value		0.91	1.55	2.75	4.59	7.81
Mean (µV)		2.75	3.12	4.00	5.55	8.50
Standard deviation (µV)		2.15	1.97	1.74	1.43	0.78