NEU surface defect database

Kechen Song and Yunhui Yan

Description:    

In the Northeastern University (NEU) surface defect database, six kinds of typical surface defects of the hot-rolled steel strip are collected, i.e., rolled-in scale (RS), patches (Pa), crazing (Cr), pitted surface (PS), inclusion (In) and scratches (Sc). The database includes 1,800 grayscale images: 300 samples each of six different kinds of typical surface defects.

Fig. 1 shows the sample images of six kinds of typical surface defects, the original resolution of each image is 200×200 pixels. From Fig. 1, we can clearly observe that the intra-class defects existing large differences in appearance, for instance, the scratches (the last column) may be horizontal scratch, vertical scratch, and slanting scratch, etc. Meanwhile the inter-class defects have similar aspects, e.g., rolled-in scale, crazing, and pitted surface. In addition, due to the influence of the illumination and material changes, the grayscale of the intra-class defect images is varied. In short, the NEU surface defect database includes two difficult challenges, i.e., the intra-class defects existing large differences in appearance while the inter-class defects have similar aspects, the defect images suffer from the influence of illumination and material changes.

Fig.1 NEU-CLS

For defect detection task, we provided annotations which indicate the class and location of a defect in each image. We have carefully clicked annotations of each target in these images. Fig. 2 shows some examples of detection results on NEU-DET. For each defect, the yellow box is the bounding box indicating its location and the green label is the class score.

Fig.2 NEU-DET

How to use the database:   
    If you are using the NEU surface defect database for defect classification task, you only need to download the image-only file, called NEU-CLS.
    If you are using the NEU surface defect database for defect detection task, you need to download the image-with-annotations file, called NEU-DET.

Download:  
     For Original NEU surface defect database: Google-Drive, Or Baidu-Pan
     For NEU-CLS: Google-Drive, Or Baidu-Pan
     For NEU-CLS-64: Google-Drive, Or Baidu-Pan
     For NEU-DET:Google-Drive, Or Baidu-Pan(code:pmqx)

Citation:    
   We would appreciate it if you cite our works when using the database:
    K. Song and Y. Yan, “A noise robust method based on completed local binary patterns for hot-rolled steel strip surface defects,” Applied Surface Science, vol. 285, pp. 858-864, Nov. 2013.
(paper)

   Yu He, Kechen Song, Qinggang Meng, Yunhui Yan, “An End-to-end Steel Surface Defect Detection Approach via Fusing Multiple Hierarchical Features,” IEEE Transactions on Instrumentation and Measuremente,  2019.(paper)

Yu He,  Kechen Song, Hongwen Dong and Yunhui Yan. "Semi-supervised Defect Classification of Steel Surface Based on Multi-training and Generative Adversarial Network ," Optics and Lasers in Engineering, 2019, 122: 294-302. (paper)

 

Links:   
    Vision-based Inspection System for Steel Surface Defects
    For Micro surface defect database: Google-Drive, Or Baidu-Pan
    For Oil pollution defect database:Google-Drive, Or Baidu-Pan