Fig. 1. Light stripe image containing high-reflective light

Fig. 2. Light stripe images containing high-reflective light on the surface of different materials. (a) Stainless steel plate; (b) aluminum plate; (c) iron plate

Fig. 3. Gray distribution and Gaussian fitting results of different types of light stripe sections. (a) C₁; (b) C₂; (c) C₃; (d) C₄

Fig. 4. Schematic of light reflection

Fig. 5. Intensity distribution of specular reflected light at incident angle of -45°

Fig. 6. Gray distribution of light stripe section before and after image filtering. (a) Before filtering; (b) after filtering

Fig. 7. ROI selection of light stripe on surface of different materials. (a) Stainless steel plate; (b) aluminum plate; (c) iron plate

Fig. 8. Double-Gaussian fitting results of different types of light stripe sections. (a) C₁; (b) C₂; (c) C₃; (d) C₄

Fig. 9. Light strip extracted by different algorithms. (a) Gray barycenter method; (b) curve fitting method; (c) direction template method; (d) double-Gaussian fitting method

Fig. 10. Confidence evaluation of light strip extraction results. (a) Gray barycenter method; (b) curve fitting method; (c) direction template method; (d) double-Gaussian fitting