KolektorSDD stands for Kolektor Surface-Defect Dataset, which contains defect images of electronic commutators. These images are collected under controlled conditions (uniform lighting, etc.) and provide pixel-level annotations of defects. This dataset collects 8 non-overlapping images of each commutator surface of 50 defective electronic commutators, resulting in a total of 399 images, including 52 defective images and 347 non-defective images.