Determination of Building Model Key Points Using Multidirectional Shaded Relief Images Generated from Airborne LiDAR Data

Table 2

Parameters and corresponding values for experiment to determine MKPs.

Procedure	Parameter	Value
Location of light source	Azimuth	45 (NE), 135 (SE), 225 (SW), 315 (NW)
	Elevation	45
Vertical exaggeration	Z-scale factor	3
CSS	Canny threshold	Low: 0.1, High: 0.2
	Curvature	0.2
	σ	3
	Gap distance [pixel]	2
Anisotropic diffusion	Number of iterations	20
	T	0.2
	k	3