“…Due to the production process and external reasons, the finished product will have defects such as inclusion, crazing, patches, scratches, waist folding, and other defects on the surface of the strip steel. These defects not only affect the appearance of the product, inspection, eddy current inspection [4], magnetic flux leakage testing [5], but the above three methods have obvious drawbacks. The cost of manual visual inspection is high, the efficiency is low, and there is a certain degree of missed inspection; eddy current inspection is easy to be restricted by the tested materials, and it is difficult to judge the type of defects; the efficiency of magnetic flux leakage testing is low, and it requires a high level of inspection personnel.…”