Fig. 1. Flow chart of algorithm

Fig. 2. Two-dimensional description and three-dimensional description. (a) Two-dimensional description; (b) three-dimensional description

Fig. 3. Segmentation effect. (a) Original point cloud data; (b) display of skeleton points and external feature points; (c) segmentation result

Fig. 4. Simulation results of dinosaur model. (a)(b) Proposed algorithm; (c) traditional algorithm in Ref. [11]

Fig. 5. Simulation results of ant model. (a)(b) Proposed algorithm; (c) traditional algorithm in Ref. [11]

Fig. 6. Simulation results of plane model. (a)(b) Proposed algorithm; (c) traditional algorithm in Ref. [11]

Fig. 7. Simulation results of hand model. (a)(b) Proposed algorithm; (c) traditional algorithm in Ref. [11]

Fig. 8. Simulation results of bird model. (a)(b) Proposed algorithm; (c) traditional algorithm in Ref. [11]

Fig. 9. Simulation results of sheep model. (a)(b) Proposed algorithm; (c) traditional algorithm in Ref. [11]

Fig. 10. Simulation results of giraffe model. (a)(b) Proposed algorithm; (c) traditional algorithm in Ref. [11]

Fig. 11. Simulation results of bear model. (a)(b) Proposed algorithm; (c) traditional algorithm in Ref. [11]

Fig. 12. Simulation results of shark model. (a)(b) Proposed algorithm; (c) traditional algorithm in Ref. [11]

Fig. 13. Simulation results of monster model. (a)(b) Proposed algorithm; (c) traditional algorithm in Ref. [11]