Inspection method, classification method, management method, steel material production method, learning model generation method, learning model, inspection device, and steel material production equipment

Abstract

Provided are an inspection method, a classification method, a management method, a steel material production method, a learning model generation method, a learning model, an inspection device, and steel material production equipment that can both improve detection accuracy and reduce processing time. The inspection method is an inspection method of detecting surface defects on an inspection target, the inspection method including: an imaging step (S) of acquiring an image of a surface of the inspection target; an extraction step (S) of extracting defect candidate parts from the image; a screening step (S) of screening the extracted defect candidate parts by a first defect determination; and an inspection step (S) of detecting harmful or harmless surface defects by a second defect determination using a convolutional neural network, the second defect determination being targeted at defect candidate parts after the screening by the first defect determination.