Defect detection

This file contains images taken from the inner surface of the head joint of a recorder musical instrument. The images are divided into two classes, NG (not good) and OK. The NG image shows a severe pattern. On the other hand, the OK image has a smooth surface. Some images in the OK class have some pattern, but it is still acceptable. The data was acquired using an industrial camera and specialized lighting in the industrial environment. The training data and testing data were collected separately to ensure the distinction between them.