The BD-DET is obtained by professional industrial cameras equipped with a ring light source, with a resolution of 2456×2048. The basic structure of the bearing includes inner and outer rings, a cage, and a sealing cover. Defects are mainly concentrated in the sealing cover area, and are divided into two types: scratches and presses. During the data acquisition process, some data only contain one type of defect, either scratches or presses, while the remaining data contain a mixture of the two defects.