An Algorithm for Detecting Seam Cracks in Steel Plates

In this study, we developed an algorithm for detecting seam cracks in a steel plate. Seam cracks are generated in the edge region of a steel plate. We used the Gabor filter and an adaptive double threshold method to detect them. To reduce the number of pseudo defects, features based on the shape of seam cracks were used. To evaluate the performance of the proposed algorithm, we tested 989 images with seam cracks and 9470 defect-free images. Experimental results show that the proposed algorithm is suitable for detecting seam cracks. However, it should be improved to increase the true positive rate.

Authors:

• Doo-chul Choi
• Yong-Ju Jeon
• Jong Pil Yun
• Sung Wook Yun
• Sang Woo Kim

Keywords:

• Defect detection
• Gabor filter
• machine vision
• surface inspection.

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