Fig. 1. Schematic diagram of region-growing

Fig. 2. Space calibration of camera and LiDAR

Fig. 3. Schematic diagram of elevation pixel values

Fig. 4. Schematic diagram of searching for similar pixels

Fig. 5. High-reflective metallurgy scenes and corresponding point clouds. (a) Experimental scene 1; (b) experimental scene 2; (c) experimental scene 3

Fig. 6. Data collection system

Fig. 7. Flowchart of proposed algorithm

Fig. 8. Point cloud hole extraction of two-dimensional pixels

Fig. 9. Flowchart of feature pixel extraction

Fig. 10. Results of experimental scence 1. (a) Original point cloud; (b) enlarged view of point cloud hole; (c) Meshlab; (d) spline curve method; (e) RBF; (f) Spiral-filling; (g) FIS; (h) proposed algorithm

Fig. 11. Results of experimental scence 2. (a) Original point cloud; (b) enlarged view of point cloud hole; (c) Meshlab; (d) spline curve method; (e) RBF; (f) Spiral-filling; (g) FIS; (h) proposed algorithm

Fig. 12. Results of experimental scence 3. (a) Original point cloud; (b) enlarged view of point cloud hole; (c) Meshlab; (d) spline curve method; (e) RBF; (f) Spiral-filling; (g) FIS; (h) proposed algorithm