Table 5.
Mean average value of accuracy and F1 scores of supervised gesture recognition from four to seven gesture labels (based on the hand movements of 19 stroke patients) without and with PCA.
| Gesture Classification without PCA (GL4, GL5, GL6, GL7) |
Gesture Classification with PCA * (GL4, GL5, GL6, GL7) |
|||||||
|---|---|---|---|---|---|---|---|---|
| Non-Paretic Side (NP19) | Paretic Side (P19) | Non-Paretic Side (NP19) | Paretic Side (P19) | |||||
| Classifier | Acc (%) |
F1 (%) |
Acc (%) |
F1 (%) |
Acc (%) |
F1 (%) |
Acc (%) |
F1 (%) |
| SVM | 94.80 | 89.74 | 88.71 | 77.53 | 92.81 | 85.63 | 87.59 | 74.90 |
| 94.19 | 85.69 | 88.48 | 71.49 | 91.41 | 78.77 | 86.07 | 65.16 | |
| 94.13 | 82.67 | 88.60 | 66.01 | 91.36 | 74.33 | 85.98 | 57.82 | |
| 94.73 | 81.82 | 89.75 | 64.26 | 91.97 | 72.00 | 86.40 | 52.20 | |
| LDA | 87.63 | 75.42 | 78.16 | 55.48 | 94.05 | 88.13 | 88.64 | 77.15 |
| 90.92 | 77.52 | 77.09 | 41.42 | 93.79 | 84.55 | 87.96 | 69.94 | |
| 92.35 | 77.39 | 77.39 | 30.63 | 93.85 | 81.66 | 87.97 | 63.98 | |
| 93.27 | 76.95 | 77.43 | 20.09 | 94.02 | 79.25 | 88.17 | 58.61 | |
| k-NN | 92.84 | 85.82 | 87.32 | 74.73 | 86.30 | 72.58 | 82.64 | 65.36 |
| 91.98 | 80.10 | 87.38 | 68.67 | 87.12 | 68.03 | 83.26 | 58.37 | |
| 91.70 | 75.34 | 86.81 | 60.72 | 87.70 | 63.76 | 84.24 | 53.03 | |
| 91.71 | 71.12 | 87.31 | 55.86 | 88.19 | 59.61 | 85.23 | 48.49 | |
* PCA had the best specific parameters for each classifier and extremity side; GL indicates the mean scores of all possible gesture combinations, while integer values of 4–7 specify the model complexity (number of gesture labels).