Model generation device for visual inspection and visual inspection device

A model generation device for generating a model used in visual inspection, comprising:

• a data acquirer for acquiring normal image data;
• an abnormal image generator for generating abnormal image data by performing image processing on the normal image data;
• a first model generation instructor for generating training data based on the normal image data and the abnormal image data and instructing a machine learning device to generate a first model by performing machine learning based on the training data;
• a restored image estimation instructor for instructing the machine learning device to estimate restored image data using the first model based on the abnormal image data;
• a label image generator for generating label image data indicating an abnormal part based on content of the image processing by the abnormal image generator;
• and
• a second model generation instructor for generating training data based on the abnormal image data, the restored image data, and the label image data and instructing the machine learning device to generate a second model by performing machine learning based on the training data.