Fig. 1. Assembly and adjustment system of rotary drum

Fig. 2. Digital assembly and adjustment flow chart of rotary drum

Fig. 3. Flow chart of improved algorithm

Fig. 4. Crosshair intersection diagrams

Fig. 5. Diagram of 6 intersections crosshairs

Fig. 6. Drum mounting platform

Fig. 7. Gaussian filtering

Fig. 8. Canny detection

Fig. 9. Standard PPHT algorithm line detection chart

Fig. 10. Improved PPHT algorithm line detection chart

Fig. 11. Intersection extraction

Fig. 12. Intersection screening

Fig. 13. Drum digital installation software