Fig. 1. Height measurement principle for fringe projection structured light system

Fig. 2. An error determination method based on measurement environment

Fig. 3. Fringe projection structured light measurement system. (a) Schematic; (b) site photo

Fig. 4. Height measurement error variation with space and time. (a) Horizontal height measurement error at certain position; (b) height measurement error variation of any three points with space; (c) height measurement error variation of any three points with time

Fig. 5. Height measurement error. (a) Average and standard deviation; (b) root-mean-square error

Fig. 6. Fitting result for different probability distributions. (a) Density graph; (b) probability graph

Fig. 7. Parameter calculation results under normal distribution

Fig. 8. Plane measurement error acquisition. (a) Site photo; (b) point extract result

Fig. 9. Plane measurement error distribution. (a) Scatter diagram; (b) histogram

Fig. 10. Plane fitting result. (a) Without noise; (b) with noise

Fig. 11. Plane data acquisition. (a) Site photo; (b) point cloud image

Fig. 12. Error from simulation and actual results

Fig. 13. Cylinder fitting results. (a) Without noise; (b) with noise

Fig. 14. Cylinder data acquisition. (a) Site photo; (b) point cloud image