Trained model generation method, trained model, surface defect detection method, steel material manufacturing method, pass / fail judgment method, grade judgment method, surface defect judgment program, pass / fail judgment program, judgment system, and steel material manufacturing equipment.

摘要

A learned model generation method generates, by using a teacher image that is an image indicating a distribution of a defect portion of a surface of steel and includes a defect map of an equal image size and presence/absence of periodic defects assigned in advance to the relevant defect map, a learned model for which a defect map that is an image indicating a distribution of a defect portion of a surface of steel and having an image size of the equal image size is an input value and a value concerning presence/absence of periodic defects in the relevant defect map is an output value, by machine learning.