Fig. 1. Coke optical tissue microscopy image imaging process

Fig. 2. Characteristics of optical tissue image of coke

Fig. 3. Complexity of optical tissue micrographs of coke

Fig. 4. MD-UNet network framework

Fig. 5. Comparison of dilated convolutional feeling fields with different expansion rates

Fig. 6. Comparison of the structure of the decoder's original convolutional module and the MBDF module

Fig. 7. Comparison plot of the ReLU and GELU activation function

Fig. 8. CloAttention module structure diagram

Fig. 9. Schematic structure of the experimental model

Fig. 10. Experimental results of the CloAttention module. (a) Image group 1; (b) Image group 2; (c) Image group 3

Fig. 11. Feature subgraph change process

Fig. 12. Coke optical tissue segmentation results. (a) Image group 1; (b) Image group 2; (c) Image group 3

Fig. 13. Experimental platforms

Fig. 14. Experimental images and semantic graphs. (a) Image group 1; (b) Image group 2; (c) Image group 3

Fig. 15. Confusion matrix