Fig. 1. High reflectivity suppression

Fig. 2. Laser images

Fig. 3. Grid laser metal surface 3D measurement system

Fig. 4. Steps of grid laser metal surface 3D measurement system

Fig. 5. Reflection of light on metal surface

Fig. 6. Experimental setups and conditions for 3D measurement based on grid laser

Fig. 7. Sum of reflected light grayscale values corresponding to polarized plate rotation angle

Fig. 8. Effect of polarizing film on suppressing reflection

Fig. 9. Laser direction

Fig. 10. Division of regions of interest for bidirectional multi line laser

Fig. 11. Extraction of line center of grid laser

Fig. 12. Flow chart for extraction of line center of grid laser based on affine transformation

Fig. 13. System setup for grid laser scanning 3D measurement

Fig. 14. Sum of grayscale values of reflected light at various angles

Fig. 15. Surface scanning results of 13 mm gauge block

Fig. 16. Surface scanning results of 15 mm gauge block

Fig. 17. Fitting results of measuring block height and measuring error

Fig. 18. Scanning results of suppressing high reflectivity method

Fig. 19. Scanning results of metal workpiece