Table 1 Impact of point cloud resolutions (0.33 mm to 4.0 mm ) to the classification result and the calculation time
Point cloud resolution [mm] | 0.33 | 0.66 | 1.0 | 1.33 | 1.66 | 2.0 | 2.33 | 2.66 | 3.0 | 3.33 | 3.66 | 4.0 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
classification result (SVM) [%] | 97.9 | 98.3 | 98.1 | 98.0 | 97.8 | 97.2 | 96.6 | 96.1 | 95.8 | 95.3 | 94.7 | 93.2 |
best r N [mm] | 1.33 | 1.6 | 1.6 | 2.0 | 2.3 | 3.0 | 4.0 | 4.0 | 4.3 | 4.3 | 4.6 | 4.6 |
best r H [mm] | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 |
misclassified points (in thsnd.) | 10.6 | 2.3 | 1.05 | 0.7 | 0.5 | 0.4 | 0.4 | 0.4 | 0.3 | 0.3 | 0.3 | 0.3 |
points (in thsnd.) | 527.0 | 134.3 | 55.6 | 35.4 | 24.4 | 16.3 | 12.5 | 10.0 | 7.7 | 6.4 | 5.4 | 4.4 |
points of leaves (in thsnd.) | 407.8 | 108.0 | 45.3 | 29.1 | 20.1 | 13.5 | 10.5 | 8.4 | 6.5 | 5.5 | 4.6 | 3.8 |
points of stem (in thsnd.) | 119.2 | 26.3 | 10.3 | 6.3 | 4.3 | 2.8 | 2.0 | 1.6 | 1.2 | 0.9 | 0.8 | 0.6 |
mean calculation time [sec] | 1160 | 155 | 52.2 | 31.1 | 19.8 | 12.3 | 9.5 | 7.4 | 5.6 | 4.7 | 4.07 | 3.3 |
min calculation time [sec] | 465 | 105 | 40.6 | 26.1 | 17.9 | 11.7 | 9.1 | 7.2 | 5.6 | 4.7 | 4.0 | 3.2 |
max calculation time [sec] | 1788 | 184 | 58.3 | 34.6 | 22.5 | 12.8 | 9.7 | 7.4 | 5.7 | 4.7 | 4.1 | 3.4 |