A Comparison Study of Edge Line Estimation Algorithms for Dimensional Quality Assessment of Precast Concrete Slabs

Figure 8

The results of data processing: (a) DBSCAN implementation results on the raw scan points; (b) extraction of top surface scan points from the PC element while excluding noises; (c) RANSAC implementation results on the top surface scan points; and (d) top surface scan points after the scan points of the rebars have been removed.

(a)

(b)

(c)

(d)