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 rN [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 rH [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 |