Fig. 1. Algorithm flow chart

Fig. 2. Super large cylindrical shell testing platform

Fig. 3. Radius filtering diagram

Fig. 4. Cylindrical model diagram

Fig. 5. Acquisition equipment and experimental test platform. (a) ATS300 laser tracker; (b) experimental test platform

Fig. 6. Test cylindrical shell

Fig. 7. Original point cloud image of cylindrical shell

Fig. 8. Effect comparison of different methods. (a) Median filter; (b) Gaussian filter; (c) average filter; (d) proposed method

Fig. 9. Before fitting point cloud data and local diagram. (a) Before fitting point cloud data; (b) local diagram of former point cloud before fitting

Fig. 10. After fitting point cloud data and local diagram. (a) After fitting point cloud data; (b) local diagram of point cloud after fitting