Fig. 1. Schematic diagram of line structured light sensor

Fig. 2. Model of multi-vision line structured light sensor system

Fig. 3. Process of sensor calibration

Fig. 4. Setup diagram of large-scale measurement system

Fig. 5. PTM calibration source images matching. (a)Images matching of slave camera 1 and master camera; (b) images matching of slave camera 2 and slave camera 1

Fig. 6. High-precision rack

Fig. 7. Comparison of the measurement results. (a) Measured profiles of the 9th tooth with the proposed method; (b) RSS of rack

Fig. 8. (a) Local light stripe image of master camera; (b) local light stripe image of slave camera 1; (c) local light stripe image of slave camera 2; (d) result of light stripe images stitching

Fig. 9. Comparison of the measurement results and local typical damages. (a),(b),(c),(d) Severely damaged area S; (e) pothole; (f) crack area 1; (g) crack area 2; (h) profile of crack