Jiabei Hu, Zhe Liu, Pengfei Zhang, Guohua Geng, Yuhe Zhang. Feature Extraction of Scattered Point Clouds Based on Discrete Morse Theory[J]. Acta Optica Sinica, 2019, 39(6): 0615002
- Acta Optica Sinica
- Vol. 39, Issue 6, 0615002 (2019)
Fig. 1. Delaunay neighborhood
Fig. 2. Illustration of angle αpiformed between points
Fig. 3. Approximate geodesic distance computation. (a) 1-order Delaunay neighborhood; (b) 2-order Delaunay neighborhood
Fig. 4. Voronoi diagram
Fig. 5. Gradient flow field from p
Fig. 6. Feature extraction effect of FunckyCube model. (a) FunckyCube model; (b) feature points
Fig. 7. Feature extraction effect of Fandisk model. (a) Fandisk model; (b) feature points
Fig. 8. Feature extraction effect of Vase model. (a) Vase model; (b) feature points
Fig. 9. Feature extraction effect of RockerArm model. (a) RockerArm model; (b) feature points
Fig. 10. Feature extraction results of noisy models. (a)(c)(e)(g) Noise of 0.03 dB; (b)(d)(f)(h) noise of 0.05 dB
Fig. 11. Point cloud models of Terracotta debris. (a) No.1 Terracotta debris; (b) No.2 Terracotta debris
Fig. 12. Feature lines extracted by Park’s method. (a) Vase model; (b) RockerArm model; (c) No.1 Terracotta debris; (d) No.2 Terracotta debris
Fig. 13. Feature lines of Wang’s method. (a) Vase model; (b) RockerArm model; (c) No.1 Terracotta debris; (d) No.2 Terracotta debris
Fig. 14. Feature lines of proposed method. (a) Vase model; (b) RockerArm model; (c) No.1 Terracotta debris; (d) No.2 Terracotta debris
Fig. 15. Line-drawings of Terracotta debris. (a) No.3 Terracotta debris; (b) line-drawing of Fig. 15(a); (c) No.4 Terracotta debris; (d) line-drawing of Fig. 15(c); (e) No.5 Terracotta debris; (f) line-drawing of Fig. 15(e); (g) No.6 Terracotta debris; (h) line-drawing of Fig. 15(g)
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