Table 1. Statistical comparison of the results obtained by proposed methods: the trajectories directly measured with marker-based stereophotogrammetry system (MBS); the trajectories estimated from stereophotogrammetric data applying the kinematic chain model (KMS); the trajectory estimated from inertial sensors data applying the same model (3DIMMU).
|
MBS vs KMS |
MBS vs 3DIMMU |
KMS vs 3DIMMU |
| RMSE (cm) |
4.5 |
7.7 |
6.6 |
| 90% percentile of absolute error (cm) |
6.9 |
12.4 |
10.3 |
| Correlation (r) |
0.99 |
0.94 |
0.93 |
| Absolute Bias (cm) |
-1.6 |
-2.9 |
-1.3 |
| 3d mean distance (cm) |
7.8 (±1.7) |
13.0 (±4.5) |
10.8 (±3.2) |
| nPVI |
0.53 (±0.51) |
0.79 (±0.57) |
0.26 (±0.26) |
