Fig. 1. Framework of two-stage point cloud segmentation algorithm

Fig. 2. Point cloud slices perpendicular to principal axis and parallel to each other

Fig. 3. Distribution of point normal for different types of surfaces

Fig. 4. Merging of slices of same type

Fig. 5. Schematic diagram of sub-point cloud feature classification

Fig. 6. Merging sub point clouds

Fig. 7. Parametric representation of surfaces

Fig. 8. Geometry-topology tree

Fig. 9. CT detection system

Fig. 10. Detection object

Fig. 11. Nozzle

Fig. 12. Exploded view of point cloud segmentation

Fig. 13. Comparison of segmentation results of different methods

Fig. 14. Sub point cloud display of segmentation results

Fig. 15. Metrics comparison of sub point clouds segmented by different methods

Fig. 16. Nozzle reconstruction