Table 1 Length of four board’s edges measured by EM sensor model 90 and Vernier caliper in mm
From: Automatic registration method using EM sensors in the IoT operating room
Measured by surgical instrument | Computed distance after stereo matching | Error | ||||
|---|---|---|---|---|---|---|
#edge | Mean length | σ | Mean length | σ | Absolute error | Relative error |
L1 | 75.32 | 0.18 | 75.12 | 0.31 | 0.18 ± 0.13 | 0.24% ± 0.17% |
L2 | 60.43 | 0.21 | 60.25 | 0.44 | 0.19 ± 0.11 | 0.32% ± 0.18% |
L3 | 75.51 | 0.16 | 75.21 | 0.39 | 0.21 ± 0.13 | 0.28% ± 0.17% |
L4 | 60.36 | 0.19 | 60.16 | 0.48 | 0.16 ± 0.12 | 0.27% ± 0.20% |