Fig. 1. Optical diagram of PMP

Fig. 2. Binary grating and grayscale distribution. (a) Binary grating; (b) grayscale distribution profile

Fig. 3. Complete extraction process of sinusoidal distribution pattern

Fig. 4. Phase shift of gratings. (a) Binary gratings I1 and I2; (b) grayscale distribution profiles of I1 and I2; (c) sinusoidal gratings S1 and S2; (d) grayscale distribution profiles of S1 and S2

Fig. 5. Schematic of experimental setup

Fig. 6. Measured heart-shaped object

Fig. 7. Reconstruction of 3D shape of object. (a) Binary deformed image of I; (b) spectral distribution of I; (c) sinusoidal deformed image obtained by extraction; (d) reconstruction of 3D shape

Fig. 8. Reconstruction results. (a) Proposed method; (b) traditional PMP method; (c) FTP method; (d) distribution profile of Fig. 8(a); (e) distribution profile of Fig. 8(b); (f) distribution profile of Fig. 8(c)