Table 4 Degree of accuracy for different sensor combinations at all 3 levels of classification—with transitions
From: Development of a Human Activity Recognition System for Ballet Tasks
Level 1 | Level 2 | Level 3 | |||||||
|---|---|---|---|---|---|---|---|---|---|
Number of sensors (number of possible sensor combinations) | Accuracy score mean (range) | Best | Worst | Accuracy score mean (range) | Best | Worst | Accuracy score mean (range) | Best | Worst |
5 (6) | 84% (83.6–84.4%) | L shin L thigh R shin R thigh Thoracic | L thigh L shin R thigh Sacrum Thoracic | 76.2% (75.9–76.6%) | L shin L thigh R shin R thigh Thoracic | L shin, L thigh R shin R thigh Sacrum | 73.6% (73.2–74%) | L shin L thigh R shin R thigh Sacrum | L shin L thigh R shin R thigh Thoracic |
4 (15) | 83.4% (82.5–84.0%) | L shin R shin R thigh Sacrum | L shin L thigh Sacrum Thoracic | 75.3% (74.5–75.9%) | L shin R shin R thigh Thoracic | L shin L thigh Sacrum Thoracic | 73.0% (71.5–74%) | L shin L thigh R shin R thigh | L shin L thigh Sacrum Thoracic |
3 (20) | 82.9% (82.1–83.6%) | L shin R shin Thoracic | L shin L thigh Sacrum | 73.9% (70–75.4%) | L shin R shin Sacrum | L shin L thigh Thoracic | 71.6% (67.1–73.3%) | L shin R shin R thigh | L shin L thigh Thoracic |
2 (15) | 82.1% (81.2–82.9%) | L shin R high | L shin Thoracic | 71.2% (67.3–74.4%) | L shin R thigh | L shin Thoracic | 68.5% (64–71.8%) | L shin R thigh | L shin Thoracic |
1 (6) | 80.6% (78.0–81.6%) | R thigh | Thoracic | 64.7% (58.5–70%) | Sacrum | Thoracic | 61.0% (47.4–67%) | Sacrum | Thoracic |