KolektorSDD2, short for Kolektor Surface-Defect Dataset 2, is a surface defect detection dataset that includes more than 3,000 images containing several types of defects, which were obtained when solving a real-world industrial problem.

The dataset includes:

• 356 images with visible defects;
• 2,979 defect-free images;
• Image size is approximately 230 x 630 pixels;
• The training set contains 246 positive images and 2,085 negative images;
• The test set contains 110 positive images and 894 negative images;
• Several different types of defects (scratches, spots, surface imperfections, etc.).