Fig. 1. Flow chart of Poisson algorithm

Fig. 2. Redundant surfaces generated by Poisson algorithm. (a) Reconstructed surface of chef model; (b) reconstructed surface of face model^[13]

Fig. 3. Surface normal vector of point cloud

Fig. 4. Surface reconstruction of chef model based on Poisson algorithm and its surface rough segmentation effect. (a) Poisson reconstruction surface; (b) Poisson reconstruction grid; (c) surface rough segmentation

Fig. 5. Vector cross product determines inner and outer directions of points near boundary. (a) Enlarged local boundaries; (b) diagram of distinguishing inner and outer points by vector cross product of boundary

Fig. 6. Schematic diagram of ray discrimination

Fig. 7. Flowchart of improved Poisson algorithm

Fig. 8. Circular tube model reconstruction based on four algorithms. (a) GP3 algorithm; (b) MC algorithm; (c) traditional Poisson algorithm; (d) improved algorithm

Fig. 9. Chef model reconstruction based on four algorithms. (a) GP3 algorithm; (b) MC algorithm; (c) traditional Poisson algorithm; (d) improved algorithm

Fig. 10. Stainless steel scrap model reconstruction based on four algorithms. (a) GP3 algorithm; (b) MC algorithm; (c) traditional Poisson algorithm; (d) improved algorithm

Fig. 11. Spanner model reconstruction based on four algorithms. (a) GP3 algorithm;(b) MC algorithm; (c) traditional Poisson algorithm; (d) improved algorithm