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

Figure 2

Examples of watershed results. The data used to demonstrate watershed in this figure is part of Dongtan City. (a) LiDAR data. (b) Oversegmentation by regular watershed. (c) Segmentation by conventional marker-controlled watershed. (d) Segmentation by improved marker-controlled watershed.

(a)

(b)

(c)

(d)