The automated surface inspection system for hot slab

The inspection for hot slab is an important issue to quality operators in steel industry. This paper introduces the automated inspection system for hot slab using interlaced lighting technology. We extract the depth information from surface images so that it make easier to overcome the unclear and noisy backgrounds and detect defects. The test results show 100% and 86% for crack and corner burst defects respectively. The false detection rate is less than 0.1% for each defect. The results imply that the proposed inspection system is very effective and promising method for inspecting hot slab.