Shuchen DING, Yunsheng QIAN, Yanjian LIN, Huimin ZHAO. Halo-based black point detection method of microchannel plate[J]. Journal of Applied Optics, 2022, 43(6): 1145
- Journal of Applied Optics
- Vol. 43, Issue 6, 1145 (2022)
Fig. 1. Diagram of fluorescent screen scratches, dust and black spots of microchannel plate
Fig. 2. Diagram of circle extraction results by Sobel
Fig. 3. Grey diagram and 3D diagram of LoG operator
Fig. 4. Diagram of detection results for LoG operator
Fig. 5. Diagram of ring segmentation results
Fig. 6. Diagram of halo detection results
Fig. 7. Diagram of non-black spot halo detection results
Fig. 8. Schematic of MCP black spot detection system
Fig. 9. Physical drawing of vacuum cavity
Fig. 10. Diagram of black-spot detection results
Fig. 11. Extraction diagram of black-spot halo under different voltages
Fig. 12. Results diagram of minimum circumscribed circle
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Table 1. Detection results of each edge detection operator
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Table 2. Coarse detection results of three methods
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Table 3. Detection results of defects
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