Fig. 1. Structure diagram of structured light three-dimensional reconstruction system

Fig. 2. Object graph of structured light three-dimensional reconstruction system

Fig. 3. Control interface of upper computer

Fig. 4. Structure of measurement system

Fig. 5. Schematic of calibration on Z axis

Fig. 6. Schematic of rotation axis calibration

Fig. 7. Result of center fitting

Fig. 8. Fitted circle and axis of rotation

Fig. 9. Fringe projection pattern

Fig. 10. (a) Three-dimensional form and (b) gray-scale form of discontinuous wrapping phase

Fig. 11. (a) Unwrapping phase diagram with the method of point by point; (b) unwrapping phase diagram with discontinuous path integral algorithm based on quality graph guidance

Fig. 12. Result of feature point extraction and matching

Fig. 13. Flow chart of stripe recognition method basedon active binocular vision

Fig. 14. Trend of the phase of point P with the change of u. (a) Change law of real phase; (b) change law of wrapped phase

Fig. 15. Stitching flow chart of three-dimensional restoration result

Fig. 16. Images of standard measured mass surface with projected fringe. (a) 0 phase shift; (b) π/2 phase shift; (c) π phase shift; (d) 3π/2 phase shift

Fig. 17. (a) Initial restoration result and (b) stitching restoration result of standard measured mass

Fig. 18. (a) Physical map of inlet guide vane; (b) extraction result of the area of vane

Fig. 19. Images of inlet guide vane surface with projected fringe. (a) 0 phase shift; (b) π/2 phase shift; (c) π phase shift; (d) 3π/2 phase shift

Fig. 20. (a) Wrapped phase and (b) unwrapped phase on inlet guide vane surface

Fig. 21. Height diagram of inlet guide vane surface

Fig. 22. (a) Initial restoration result, (b) preliminary stitching restoration result and (c) stitching result using the iterative nearest point algorithm of inlet guide vane

Fig. 23. Blade section of inlet guide vane