Wenhao Lai, Mengran Zhou, Feng Hu, Kai Bian, Hongping Song. Coal Gangue Detection Based on Multi-Spectral Imaging and Improved YOLO v4[J]. Acta Optica Sinica, 2020, 40(24): 2411001
- Acta Optica Sinica
- Vol. 40, Issue 24, 2411001 (2020)
Fig. 1. System of multi-spectral data acquisition
Fig. 2. Multi-spectral image of coal and coal gangue
Fig. 3. Structures of YOLO and YOLO v3 models
Fig. 4. Schematic diagram of YOLO v4.1
Fig. 5. Average recognition accuracy in different bands. (a) Two classes of coal and coal gangue; (b) three classes of coal, coal gangue, and mix
Fig. 6. Confusion matrix of correlation coefficients
Fig. 7. Test results. (a) Coal416; (b) coal512; (c) coal608; (d) coal408; (e) coal gangue416; (f) coal gangue512; (g) coal gangue608; (h) coal gangue408
Fig. 8. Detection result of YOLO v4.1
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Table 1. Data information of coal and coal gangue
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Table 2. Recognition results of AdaBoost, RF, and CART
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Table 3. [in Chinese]
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Table 4. Test results of each detection model
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Table 5. Coordinate and score of bounding box
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