Fig. 1. Schematic diagram of 3D reconstruction of Gray code structured light

Fig. 2. Schematic diagram of global 3D reconstruction based on visual positioning of rear camera

Fig. 3. Improved structured light system diagram

Fig. 4. Schematic diagram of camera imaging model

Fig. 5. Self-calibration diagram of structured light system identification board

Fig. 6. Experimental flowchart of 3D reconstruction

Fig. 7. Calibration experimental diagram of structured light system

Fig. 8. Schematic diagram of 3D reconstruction experiment

Fig. 9. Point cloud data of aircraft global 3D reconstruction

Fig. 10. Reprojection error map

Fig. 11. Analysis of 3D reconstruction accuracy of structured light. (a) Step gauge block; (b) measured fringes; (c) average height of step gauge block

Fig. 12. Global 3D reconstruction accuracy analysis based on rear positioning. (a) Plate to be tested; (b) first position of measurement fringes; (c) point cloud error histogram

Fig. 13. ICP stitching results of point clouds. (a) Splicing result of point cloud at 1st and 2nd positions; (b) point cloud stitching results at 1st, 2nd, and 3rd positions