Method | RMSE (mm) | NRMSE | MAE (mm) | Correlation coefficient |
KLT Optical Flow | 0.212 | 0.419 | 0.175 | 0.768 |
Farneback Optical Flow | 0.074 | 0.146 | 0.058 | 0.940 |
SURF Feature Point Matching | 0.140 | 0.276 | 0.110 | 0.778 |
Ours | 0.046 | 0.090 | 0.037 | 0.960 |