Fig. 1. Flowchart of OCR technology

Fig. 2. The principle of object detection models based on CNN

Fig. 3. Schematic diagram of fast R⁃CNN

Fig. 4. Schematic diagram of MobileNetV3

Fig. 5. Comparison of algorithm effects in complex environments

Fig. 6. Schematic Diagram of SE Module

Fig. 7. Calculation process of the SE module

Fig. 8. Workflow diagram of the SAM module

Fig. 9. Comparison between Predicted Segmentation and Ground Truth Segmentation Effects

Fig. 10. Diagram of hardware selection testing device

Fig. 11. User interaction interface

Fig. 12. Effect of image pre⁃processing

Fig. 13. Object detection effect

Fig. 14. Segmentation effect of the improved model on the dial

Fig. 15. Pointer contour diagram