Fig. 1. Visual collaboration identity

Fig. 2. Center positioning process

Fig. 3. Center detection results under different angles

Fig. 4. Connection device structure

Fig. 5. Vision-guided measurement equipment

Fig. 6. Cooperation logo picture

Fig. 7. Calibration result of the measuring point

Fig. 8. Vision-guided measurement flowchart

Fig. 9. Schematic diagram of angle pixel change

Fig. 10. Flowchart of guidance strategy based on angle pixel coefficient

Fig. 11. Guidance process center trajectories. (a) Angle pixel coefficient guidance strateg; (b) angle change guidance strategy

Fig. 12. Vision-guided precision experimental environment

Fig. 13. Schematic diagram of manual measurement

Fig. 14. Automatic measurement error

Fig. 15. Error bar chart of each distance measurement result

Fig. 16. Experimental scenario for measuring efficiency