Canopy Extraction and Height Estimation of Trees in a Shelter Forest Based on Fusion of an Airborne Multispectral Image and Photogrammetric Point Cloud

Table 6

Comparison of linear fitting accuracy evaluation of different methods for estimating tree height.

Study area	Method		RMSE (m)
1	DEM (after RBFNN interpolation)	0.91	0.68
	DEM (without RBFNN interpolation)	0.47	1.48
	DEM (Pix4D software)	0.50	1.93
2	DEM (after RBFNN interpolation)	0.93	0.30
	DEM (without RBFNN interpolation)	0.84	0.41
	DEM (Pix4D software)	0.64	1.52
3	DEM (after RBFNN interpolation)	0.88	1.03
	DEM (without RBFNN interpolation)	0.60	1.68
	DEM (Pix4D software)	0.45	2.01