Fig. 1. Schematic of fringe projection system

Fig. 2. Schematic of bidirectional reflection on object surface

Fig. 3. Flowchart of the system

Fig. 4. Image stereo rectification

Fig. 5. BRDF parameter distribution of plane under custom parameters

Fig. 6. BRDF distribution fitting process. (a) BRDF distribution in highlight area; (b) BRDF high-order surface fitting distribution in highlight area; (c) fitting error distribution

Fig. 7. Image matching process. (a) Original projected image; (b) original image taken by camera; (c) image in real scene; (d) one-dimensional alignment image between camera and projector after matching and correction

Fig. 8. Comparison between BRDF and real light intensity. (a) Metal surface image under real scene; (b) comparison between BRDF distribution and real light intensity distribution

Fig. 9. Experience part

Fig. 10. System experiment. (a) Original image; (b)unmodulated fringe pattern; (c) unmodulated depth diagram; (d) unmodulated point clouds; (e)modulated fringe pattern; (f) modulated depth diagram; (g) modulated point clouds

Fig. 11. Accuracy verification experiment. (a) Step point clouds; (b) Plane fitting and distance between steps