Fig. 1. Application scenarios of 3D-DIC and FPP

Fig. 2. Schematic diagram of FPP^[29]

Fig. 3. Schematic diagram of 3D-DIC^[23]

Fig. 4. Comparison of advantages and disadvantages of FPP and 3D-DIC technology

Fig. 5. Accuracy evaluation models of FPP and DIC. (a) Peaks function surface deformation reconstruction result under noisy environment; (b) FPP accuracy evaluation model; (c) DIC accuracy evaluation model

Fig. 6. FPP-based MDIS

Fig. 7. Efficient structured light projection coding^[55]

Fig. 8. Intensity-chroma information separation method

Fig. 9. General information separation method^[59]

Fig. 10. Principle of 3D displacement calculation^[58]

Fig. 11. Schematic diagram of strain calculation. (a) Traditional strain analysis; (b) Chained strain analysis^[58]

Fig. 12. Multi-dimensional measuring instrument. (a) Technological breakthrough; (b ) Hardware design; (c) Software development

Fig. 13. Stress measurement results of complex structures. (a) Laminated structure; (b) Damping structure; (c) Woven composite structure

Fig. 14. Comparative experiments on separation ability using (a) filtering separation; (b) RGB separation; (c) luma-chroma separation

Fig. 15. Accuracy evaluation of different information separation methods. (a) filter separation; (b) RGB single channel separation; (c) Luma-chroma separation; (d) Corresponding speckle pattern and MIG

Fig. 16. Measurement results on honeycomb structure using 3D-DIC and FPP methods^[57]

Fig. 17. Measurement results on composite braided structure using 3D-DIC and FPP methods^[58]

Fig. 18. Measurement results of type Ⅲ deformation with traditional methods and depth constraints

Fig. 19. Comparison of calculation efficiency between 3D-DIC and FPP-based MDIS^[57]