Table 2 Average (standard deviation) of the gait variables calculated for the motion capture and video data using the three pose tracking algorithms
Gait variable | Motion capture | AlphaPose | OpenPose | Detectron | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Front view walks | Back view walks | Front view walks | Back view walks | Front view walks | Back view walks | Front view walks | Back view walks | |||||||
Top camera | Eye-level camera | Top camera | Eye-level camera | Top camera | Eye-level camera | Top camera | Eye-level camera | Top camera | Eye-level camera | Top camera | Eye-level camera | |||
Cadence (steps per minute) | 106.44 (8.10) | 105.30 (8.98) | 106.23 (9.14) | 106.51 (8.62) | 105.63 (9.39) | 105.26 (9.30) | 106.22 (9.14) | 106.51 (8.62) | 105.63 (9.40) | 105.26 (9.29) | 106.23 (9.14) | 106.52 (8.62) | 105.63 (9.39) | 105.26 (9.29) |
Step time (s) | 0.57 (0.06) | 0.58 (0.07) | 0.57 (0.10) | 0.57 (0.06) | 0.58 (0.17) | 0.58 (0.07) | 0.57 (0.10) | 0.57 (0.06) | 0.58 (0.17) | 0.58 (0.07) | 0.57 (0.10) | 0.57 (0.06) | 0.58 (0.17) | 0.58 (0.07) |
Step width (m)* | 0.09 (0.05) | 0.10 (0.04) | 0.63 (0.20) | 0.62 (0.20) | 0.55 (0.16) | 0.54 (0.16) | 0.62 (0.46) | 0.67 (0.29) | 0.59 (0.23) | 0.54 (0.22) | 0.66 (0.19) | 0.64 (0.19) | 0.86 (1.92) | 0.54 (0.15) |
CV step time | 0.06 (0.03) | 0.06 (0.04) | 0.13 (0.10) | 0.06 (0.02) | 0.16 (0.18) | 0.06 (0.03) | 0.13 (0.10) | 0.06 (0.02) | 0.16 (0.18) | 0.06 (0.03) | 0.13 (0.10) | 0.06 (0.02) | 0.16 (0.18) | 0.06 (0.03) |
CV step width | 0.42 (0.21) | 0.37 (0.16) | 0.27 (0.08) | 0.30 (0.07) | 0.27 (0.08) | 0.28 (0.07) | 0.38 (0.21) | 0.38 (0.12) | 0.37 (0.10) | 0.39 (0.09) | 0.25 (0.07) | 0.28 (0.06) | 0.29 (0.12) | 0.27 (0.08) |
eMOS (m)a | 0.04 (0.02) | 0.04 (0.02) | 0.25 (0.12) | 0.23 (0.10) | 0.22 (0.09) | 0.21 (0.08) | 0.33 (0.14) | 0.30 (0.14) | 0.28 (0.12) | 0.25 (0.11) | 0.25 (0.12) | 0.23 (0.09) | 0.40 (0.15) | 0.21 (0.09) |