Research Article
A Segmental Approach with SWT Technique for Denoising the EOG Signal
Table 2
RMSE values obtained between reference EOG signal and denoised EOG signals by increasing segments approach using RLS adaptive filtering 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 | 36.12 | 35.92 | 36.42 | 36.49 | 36.20 | 2 | 1:1024 | 25.54 | 25.40 | 25.76 | 25.84 | 25.71 | 3 | 1:1536 | 20.85 | 20.75 | 21.05 | 21.13 | 21.12 | 4 | 1:2048 | 18.06 | 17.97 | 18.24 | 18.33 | 18.38 | 5 | 1:2560 | 22.00 | 21.93 | 22.16 | 22.18 | 22.15 | 6 | 1:3072 | 22.09 | 20.03 | 20.23 | 20.26 | 20.28 | 7 | 1:3584 | 22.05 | 21.99 | 22.12 | 22.19 | 22.11 | 8 | 1:4096 | 20.63 | 20.57 | 20.69 | 20.77 | 20.72 | 9 | 1:4608 | 22.30 | 22.32 | 22.40 | 22.57 | 22.51 | 10 | 1:5120 | 21.63 | 21.65 | 21.74 | 21.88 | 21.86 | 11 | 1:5632 | 23.80 | 23.81 | 23.94 | 24.11 | 23.98 | 12 | 1:6144 | 26.69 | 26.69 | 26.83 | 27.04 | 26.87 | 13 | 1:6656 | 28.13 | 28.15 | 28.22 | 28.50 | 28.31 | 14 | 1:7168 | 30.08 | 30.13 | 30.21 | 30.44 | 30.32 | 15 | 1:7680 | 29.06 | 29.10 | 29.19 | 29.41 | 29.31 | 16 | 1:8192 | 28.87 | 28.91 | 28.98 | 29.16 | 29.10 |
| Maximum value | 36.12 | 35.92 | 36.42 | 36.49 | 36.20 |
| Minimum value | 18.06 | 17.97 | 18.24 | 18.33 | 18.38 |
| Mean (µV) | 24.87 | 24.71 | 24.89 | 25.02 | 24.93 |
| Standard deviation (µV) | 4.65 | 4.76 | 4.78 | 4.81 | 4.74 |
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