Fig. 1. Diagram of cylindrical sub-aperture stitching principle

Fig. 2. Diagram of sub-aperture stitching principle

Fig. 3. Schematic diagram of weighted fusion algorithm

Fig. 4. Schematic diagram of cylindrical two-position absolute measurement method

Fig. 5. Original data diagram of cylindrical sample

Fig. 6. Surface shape diagrams of 18 sub-aperture for cylindrical sample

Fig. 7. Results of combining homogenization method and weighted fusion method

Fig. 8. Residual results of combining homogenization method and weighted fusion method

Fig. 9. Diagram of sub-aperture splicing detection equipment

Fig. 10. 20 sets of sub-aperture interferometric measurement fringe patterns

Fig. 11. 20 sets of sub-aperture interferometric measurement surface patterns

Fig. 12. 20 sets of sub-aperture interferometric measurement results

Fig. 13. Two-dimensional and three-dimensional images of results obtained by combining homogenization and weighted fusion methods

Fig. 14. Square region extracted from stitching results

Fig. 15. Absolute surface shape of square region