Fig. 1. Schematic diagram of the structured light 3D reconstruction system

Fig. 2. Schematic diagram of the triangulation method

Fig. 3. Reliability value between adjacent pixels. (a) Reliability value of a single pixel; (b) reliability value of the expanded path

Fig. 4. Process of reliability sequencing. (a) First time; (b) second time; (c) third time; (d) fourth time

Fig. 5. Edge detection results of the three operators. (a) Laplacian operator; (b) LoG operator; (c) Canny operator

Fig. 6. Process of edge detection processing. (a) Ear modulation map with missing information; (b) image obtained after NMS processing; (c) image obtained after edge processing

Fig. 7. Flow chart of phase unwrapping

Fig. 8. Error analysis of phase unwrapping. (a) 3D description of the phase function; (b) phase unwrapping errors of different algorithms

Fig. 9. Phase unwrapping results of our algorithm in different environments. (a) Ideal situation; (b) random noise; (c) information loss; (d) random noise and information loss

Fig. 10. Physical map of the built system

Fig. 11. Image and ear model modulation after the raster is expanded. (a) Unfolded image of grating phase; (b) modulated grating image of ear model

Fig. 12. Results obtained by the Goldstein branch cutting method. (a) 2D image of the ear model; (b) ear model after phase expansion; (c) true height of the ear model

Fig. 13. Wrapping phase and phase unfolding diagrams of the two algorithms. (a)-(b) Least square method; (c)-(d) our algorithm

Fig. 14. Phase unwrapping results of the two algorithms. (a) Least squares algorithm (2D); (b) our algorithm (2D); (c) least squares algorithm (3D); (d) our algorithm (3D)

Fig. 15. Cochlear model obtained by 3D reconstruction