Fig. 1. Schematic diagram of fringe projection based 3D measurement system

Fig. 2. Experimental results of frequency multiplexing. (a) Original image； (b), (c), (d) fringes image at different moment separated by filtering

Fig. 3. Experimental results of color multiplexing. (a) Original image; (b), (c), (d) Fringes image at different moment separated by color

Fig. 4. Schematic diagram of multi period scanning and sampling

Fig. 5. Experimental results of vibration modes of the loudspeaker membrane. (a) Excitation frequency of 660 Hz; (b) Excitation frequency of 1 000 Hz

Fig. 6. A set images of dynamic face measurement sequence. (a)，(b) High frequency fringes with phase difference 2π/3; (c) Low frequency fringe; (d) Image obtained with white light illumination; (e)，(f) Images obtained with red and green light illumination separately

Fig. 7. Measurement results of expression change. (a)，(b) Expression at different moment; (c) 3D shape with color texture

Fig. 8. Schematic diagram of projection distance minimization

Fig. 9. Example pattern of 3 level 2D spatial coding

Fig. 10. Relationship of fringe order and code

Fig. 11. Experimental results of absolute phase for two dimensional three level spatial coding method. (a) Deformed fringe; (b) Depth map

Fig. 12. Schematic diagram of multi-view geometric constraints

Fig. 13. Experimental results of phase compensation. (a) Phase measured by PMP； (b)-(d) Results of phase compensation by FAPS, WFAPS and GWFAPS separately；(e) Result combining GWFAPS with PMP

Fig. 14. Comparison of different algorithm for obtaining phase. (a) By Fourier transform; (b) By background- eliminated Fourier transform; (c) By background-normalized Fourier transform