Fig. 1. Principle of fringe projection profilometry

Fig. 2. Schematic diagram of saturation region blocking

Fig. 3. Schematic diagram of smoothing the projection intensity and filling the holes based on polynomial fitting

Fig. 4. Flow chart of generating the adaptive fringe patterns

Fig. 5. Setup of the measurement system

Fig. 6. Initial and refined projection intensity maps. (a) Initial projection intensity map; (b) Refined projection intensity map; (c) Comparison of the initial and refined maps at one row

Fig. 7. Hole filling by different methods and the corresponding fringe pattern. (a) Before filling; (b) Median filter; (c) Proposed method; (d)-(f) Fringe patterns corresponding to the above methods are shown respectively

Fig. 8. Comparison of the hole filling results at at one row by using median filter and proposed method

Fig. 9. Comparison of the fringe projection. (a) Conventional FPP; (b) Proposed method

Fig. 10. Comparison of the fringe gray value map at one row

Fig. 11. Experimental results of first group. (a) Fringe projection result of conventional FPP method; (b) Fringe projection result of Chen’s method; (c) Fringe projection result of Zhan’s method; (d) Fringe projection result of proposed method; (e) 3D reconstruction result of conventional FPP method; (f) 3D reconstruction result of Chen’s method; (g) 3D reconstruction result of Zhan’s method; (h) 3D reconstruction result of proposed method; (i) Reconstruction result in the saturated region of conventional FPP method; (j) Reconstruction result in the saturated region of Chen’s method; (k) Reconstruction result in the saturated region of Zhan’s method; (l) Reconstruction result in the saturated region of proposed method; (m) Comparison of measured height on one row of the three methods

Fig. 12. Experimental results of second group. (a) Fringe projection result of conventional FPP method; (b) Fringe projection result of Chen’s method; (c) Fringe projection result of Zhan’s method; (d) Fringe projection result of proposed method; (e) 3D reconstruction result of conventional FPP method; (f) 3D reconstruction result of Chen’s method; (g) 3D reconstruction result of Zhan’s method; (h) 3D reconstruction result of proposed method; (i) Reconstruction result in the saturated region of conventional FPP method; (j) Reconstruction result in the saturated region of Chen’s method; (k) Reconstruction result in the saturated region of Zhan’s method; (l) Reconstruction result in the saturated region of proposed method; (m) Comparison of measured height on one row of the three methods

Fig. 13. 3D reconstruction effects of Ru Kiln tea caddy using different methods. (a) Ru Kiln tea caddy; (b) Conventional FPP method; (c) Chen’s method; (d) Zhan’s method; (e) Proposed method

Fig. 14. 3D reconstruction results of the metal plane by different methods: (a) Conventional FPP method; (b) Chen’s method; (c) Zhan’s method; (d) Proposed method

Table 1. Standard deviation of different methods and the number of images during projection