The NEU-DET dataset is a set of images characterized by surface defects on hot rolled steel strip. These defects are classified into six categories: cracks (cr), inclusions (in), patches (pa), pitted surfaces (ps), rolled scales (rs) and scratches (sc). The dataset contains 300 grayscale images for each category, for a total of 1800 images, each of which is 200×200 pixels in size.