Fig. 1. Phase analysis methods for fringe pattern

Fig. 2. Principle of the sampling Moiré method^[21]. (a) One line of pixels from a CCD camera; (b) down-sampling; (c) intensity interpolation; (d) generated multiple phase-shifting Moiré fringes

Fig. 3. Measurement principles of the conventional phase-shifting method and the spatiotemporal phase-shifting method. (a) Conventional phase-shifting method; (b) spatiotemporal phase-shifting method

Fig. 4. Image processing procedure of the ST-PSM^[12]

Fig. 5. Simulation results. (a) Intensity nonlinearity; (b) intensity saturation

Fig. 6. Non-contact three-dimensional shape measuring device based on fringe projection method. (a) Experiment diagram; (b) device photo; (c) measured object

Fig. 7. Analysis results of Moiré fringe and Moiré phase. (a)-(c) Recorded image, Moiré fringe, and Moiré phase distribution when the camera exposure time is 0.02 s; (d)-(f) recorded image, Moiré fringe, and Moiré phase distribution when the camera exposure time is 0.2 s

Fig. 8. Phase distribution results. (a)-(c) Phase distribution results obtained by ST-PSM, PSM, and SM when the camera exposure time is 0.02 s; (d)-(f) phase distribution results obtained by ST-PSM, PSM, and SM when the camera exposure time is 0.2 s

Fig. 9. Phase gradient distribution results. (a)-(c) Phase gradient distribution results obtained by ST-PSM, PSM, and SM when the camera exposure time is 0.02 s; (d)-(f) phase gradient distribution results obtained by ST-PSM, PSM, and SM when the camera exposure time is 0.2 s

Fig. 10. Height distribution results. (a)-(c) Height distribution results obtained by ST-PSM, PSM, and SM when the camera exposure time is 0.02 s; (d)-(f) height distribution results obtained by ST-PSM, PSM, and SM when the camera exposure time is 0.2 s

Fig. 11. Results of height distribution at cross-sectional AA'. (a) (b) Results obtained by ST-PSM at camera exposure times of 0.02 s and 0.2 s; (c)(d) results obtained by PSM at camera exposure times of 0.02 s and 0.2 s; (e)(f) results obtained by SM at camera exposure times of 0.02 s and 0.2 s