Research Article
A Segmental Approach with SWT Technique for Denoising the EOG Signal
Table 3
RMSE values obtained between reference EOG signal and denoised EOG signals by different equal 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 | 513:1024 | 0.75 | 1.56 | 3.06 | 4.34 | 7.28 | 3 | 1025:1536 | 0.88 | 1.57 | 2.82 | 4.50 | 7.93 | 4 | 1537:2048 | 0.82 | 1.46 | 2.47 | 4.66 | 8.35 | 5 | 2049:2560 | 8.05 | 8.18 | 8.50 | 9.52 | 11.15 | 6 | 2561:3072 | 0.96 | 1.54 | 2.68 | 4.58 | 8.28 | 7 | 3073:3584 | 8.21 | 8.32 | 8.66 | 9.49 | 11.54 | 8 | 3585:4096 | 0.81 | 1.39 | 2.71 | 4.32 | 7.89 | 9 | 4097:4608 | 8.18 | 8.27 | 8.55 | 9.28 | 11.73 | 10 | 4609:5120 | 3.27 | 3.55 | 4.10 | 5.46 | 8.70 | 11 | 5121:5632 | 0.95 | 1.59 | 2.44 | 4.58 | 8.24 | 12 | 5633:6144 | 1.05 | 1.62 | 2.87 | 4.79 | 8.27 | 13 | 6145:6656 | 1.06 | 1.59 | 2.49 | 4.16 | 8.59 | 14 | 6657:7168 | 3.53 | 3.76 | 4.16 | 6.10 | 8.81 | 15 | 7169:7680 | 0.84 | 1.49 | 2.61 | 4.31 | 8.64 | 16 | 7681:8192 | 5.89 | 6.09 | 6.36 | 7.84 | 10.31 |
| Maximum value | 8.38 | 8.39 | 8.81 | 9.78 | 11.73 |
| Minimum value | 0.75 | 1.39 | 2.44 | 4.16 | 7.28 |
| Mean (µV) | 3.35 | 3.77 | 3.99 | 6.11 | 9.17 |
| Standard deviation (µV) | 3.21 | 2.97 | 2.61 | 2.23 | 1.44 |
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