Fig. 1. Dark channel noise template diagram

Fig. 2. Schematic of gray weighted location based on centroid tracking

Fig. 3. Laser spot data

Fig. 4. Laser spot and three-dimensional display results. (a) Original image; (b) three-dimensional display of original image; (c) laser spot image after denoising; (d) three-dimensional display of laser spot image after denoising

Fig. 5. Results of centroid extraction. (a) (b) Gray-weighted method centroid extraction results in x and y directions; (c) (d) Gaussian surface fitting method centroid extraction results in x and y directions; (e) (f) ellipse fitting method extraction results in x and y directions; (g) (h) proposed method extraction results in x and y directions

Fig. 6. Results of centroid extraction. (a) (b) Gray-weighted method centroid extraction results in x and y directions; (c) (d) Gaussian surface fitting method centroid extraction results in x and y directions; (e) (f) ellipse fitting method extraction results in x and y directions; (g) (h) proposed method extraction results in x and y directions

Table 1.