Fig. 1. Structured light 3D reconstruction system

Fig. 2. Calibration algorithm flowchart

Fig. 3. Schematic diagram of calibration system

Fig. 4. Patterns in the calibration process. (a) Checkerboard pattern displayed on the LCD; (b) pattern taken by the camera under strong light source; (c) pattern after global inverse binarization; (d) color marking

Fig. 5. Mismatched impact estimation models

Fig. 6. Variation of minimum precision with overexposure area and scale coefficient

Fig. 7. Calibration tools. (a) High precision industrial calibration board; (b) standard sphere; (c) standard plate

Fig. 8. Schematic diagrams of metal parts and their point cloud images before and after LCD modulation; (a1)(a2) Original images of metal parts; (b1)(b2) images of metal parts after LCD modulation; (c1)(c2) original image point cloud of the metal parts; (d1)(d2) point cloud image of metal parts after LCD modulation

Fig. 9. Gray scale histograms of metal parts; (a1)(a2) Gray scale histogram of the original metal parts image; (b1)(b2) gray scale histogram of metal parts image after LCD modulation

Fig. 10. 3D reconstruction of milk carton. (a) Original image of milk carton; (b) gray scale histogram of the milk carton original image; (c) point cloud image of original milk carton; (d) image of milk carton after LCD modulation; (e) gray scale histogram of milk carton image after LCD modulation; (f) point cloud image of milk carton after LCD modulation

Fig. 11. 3D reconstruction of head sculpture. (a) Original image of head sculpture; (b) gray scale histogram of the original head sculpture image; (c) point cloud image of original head sculpture; (d) image of head sculpture after LCD modulation; (e) gray scale histogram of head sculpture image after LCD modulation; (f) point cloud image of head sculpture after LCD modulation