Fig. 1. Gauss curve

Fig. 2. Line structured light strip

Fig. 3. Cross section of line structured light strip with Gaussian like distribution

Fig. 4. Schematic of boundary tracking

Fig. 5. Pixel positions domain of boundary point. (a) Chain code representation; (b) coordinate representation

Fig. 6. Chain code representation of the boundary

Fig. 7. Hypothetical laser stripe

Fig. 8. Search strategy of the proposed algorithm

Fig. 9. Stripe centers extracted by the proposed algorithm

Fig. 10. Stripe centers extracted by Steger algorithm

Fig. 11. Stripe centers extracted by traditional barycenter algorithm

Fig. 12. Enlarged image of the point outside the stripe center extracted by Steger algorithm. (a) Outer points of the laser strip central region; (b) outer points of the laser strip end region

Fig. 13. Original image

Fig. 14. Noise image

Fig. 15. Stripe center extracted from the original image

Fig. 16. Stripe center extracted from the noise image

Fig. 17. Enlarged view of solid frame in Fig. 15

Fig. 18. Enlarged view of solid frame in Fig. 16

Fig. 19. Enlarged view of dotted box in Fig. 15

Fig. 20. Enlarged view of dotted box in Fig. 16