Fig. 1. Flow chart of imaging

Fig. 2. Fringe projection picture and original phase image. (a) Fringe projection picture of teeth;(b) original phase image

Fig. 3. Results of twice reconstruction. (a) Phase image of first time reconstruction; (b) phase image of second time reconstruction

Fig. 4. Results of twice reconstruction after transposition. (a) Phase image of third time reconstruction; (b) phase image of forth time reconstruction

Fig. 5. Final results. (a) Top view of final result; (b) 3D image of final result

Fig. 6. Results of least square method. (a) Top view rebulided by least square method; (b) 3D image rebulided by least square method

Fig. 7. Results of weighted least square method. (a) Top view rebulided by weighted least square method; (b) 3D image rebulided by weighted least square method

Fig. 8. Wrapped phase image and rewrapped phase image of regional judgement. (a) Wrapped phase image; (b) rewrapped phase image of regional judgement

Fig. 9. Wrapped phase image and rewrapped phase image of least square method. (a) Wrapped phase image; (b) rewrapped phase image of least square method

Fig. 10. Wrapped phase image and rewrapped phase image of weighted least square method. (a) Wrapped phase image; (b) rewrapped phase image of weighted least square method

Fig. 11. First case. (a) Fringe projection picture; (b) rebuilded 3D image

Fig. 12. Second case. (a) Fringe projection picture; (b) rebuilded 3D image

Fig. 13. Third case. (a) Fringe projection picture; (b) rebuilded 3D image