Fig. 1. (a) Speckle vision system and (b) its two-dimensional schematic diagram

Fig. 2. Diagram of spatial intersection

Fig. 3. Schematic of splicing principle

Fig. 4. Flow chart of boundary point extraction

Fig. 5. (a) Actual measuring platform and (b) calibration target

Fig. 6. Binocular camera internal parameter calibration residuals. (a) Left camera; (b) right camera

Fig. 7. Stereo matching of speckles. (a) Images to be matched; (b) matching images

Fig. 8. Blade point cloud reconstruction. (a) Front blade point cloud; (b) rear blade point cloud

Fig. 9. Image processing of some markers

Fig. 10. Visual splicing of blade surface point cloud

Fig. 11. (a) Boundary points of front blade; (b) fitting curve with the cubic B-spline method

Fig. 12. Splicing of blade point cloud fitting

Fig. 13. (a) Fitting surface of front blade point cloud; (b) fitting surface of rear blade point cloud; (c) overall surface configuration of the blade