Fig. 1. Regionalization of blade surface

Fig. 2. Principle of linear laser profile measurement

Fig. 3. Laser scanning strategy for overlapping regions

Fig. 4. Flow chart of laser overlapping three-dimensional reconstruction

Fig. 5. Transformation of point cloud coordinate system on blade surface

Fig. 6. Scanning process of standard gauge block group

Fig. 7. Point cloud and numerical annotation of standard gauge block ladder. (a) Point cloud of standard gauge block step; (b) linear analysis of gauge block step

Fig. 8. Experimental platform for three-dimensional reconstruction of damaged blade by linear laser

Fig. 9. Leaf basin surface with different overlapping rates. (a) R_OA=0%; (b) R_OA=20%; (c) R_OA=40%

Fig. 10. Three-dimensional view of blade basin surface with R_OA=50%. (a)-(f) Six sets of point cloud blocks

Fig. 11. Registration results of weight optimized ICP algorithm. (a) Before registration; (b) after registration

Fig. 12. Comparison of iterative process of ICP algorithms

Fig. 13. Four sets of point cloud after single face registration. (a) Blade basin surface; (b) front edge surface; (c) blade back surface; (d) back edge surface

Fig. 14. Point cloud of damaged blade after three-dimensional registration

Fig. 15. Blade model after point cloud simplification and triangulation