1. scratches: line defects caused by sharp objects scratching or rubbing the surface.
2. Bottom Leakage: Uneven coating, missed areas or incomplete coverage.
3. Spotting: small spots on the surface with sudden changes in color, brightness, etc.
4. Bubble: the surface of the object appeared in the form of round or oval bumps, the presence of air or other gases inside.
5. Pits: visible depressions or pits on the surface of an object.
6. Stain: the surface of the object appears foreign objects, stains or oil and other unclean substances.
7. Missing/fractured: the surface of the object is missing a part or there is an obvious fracture.
These are just some of the common types of surface defects, and there may be other types of defects in real-world applications. Industrial vision systems typically utilize image processing algorithms and models to automatically detect and classify these defects and generate reports for further processing.