3D Reconstruction of Tree-Crown Based on the UAV Aerial Images

Figure 9

The result with different threshold; (a) with threshold as 0.93, 28 feature points are selected, and the result is poor because of the remaining disturbance; (b) with the threshold as 0.92, 27 feature points are selected, and it has a similar result as 0.93; (c) with the threshold as 0.91, 23 feature points are selected, and the result has an effective improvement; (d) with the threshold as 0.90, only one feature point is lost against the result as 0.91.

(a) Threshold 0.93

(b) Threshold 0.92

(c) Threshold 0.91

(d) Threshold 0.90