Fig. 1. Planck curves

Fig. 2. ACE basic flow

Fig. 3. Light deflection in non-homogeneous media

Fig. 4. Style of tested part

Fig. 5. Structure of test system

Fig. 6. Physical diagram of test system

Fig. 7. Comparison of specimens. (a) Before defogging enhancement treatment; (b) after defogging enhancement treatment

Fig. 8. Grayscale images. (a) Before defogging enhancement treatment; (b) after defogging enhancement treatment

Fig. 9. Distributions of grey values in measured area. (a) Before defogging enhancement treatment; (b) after defogging enhancement treatment

Fig. 10. Displacement cloud maps. (a1)‒(a4) Before inverse filtering; (b1)‒(b4) after inverse filtering

Fig. 11. Comparison of measured displacements and displacement true values before and after inverse filtering

Fig. 12. Maximum relative error in full-field displacement of specimen before and after inverse filtering