Fig. 1. Simple separation problem

Fig. 2. Image pre-processing

Fig. 3. Typical industrial CT images

Fig. 4. Partial sample CT images

Fig. 5. Filtering results after morphological operation

Fig. 6. Automatic threshold segmentation results

Fig. 7. Partial of sub-images

Fig. 8. Recognition results of different features

Fig. 9. Segmentation results of different algorithms

Fig. 10. Model generalization ability and robustness verification