The decoiled sheet inspection system is used to detect various defects on steel sheets after decoiling. By replacing manual inspection with line-scan cameras and AI-based algorithms, the system improves product quality in subsequent stamping processes and avoids production cost losses caused by raw material defects. Detectable defects include black spots, scratches, transport damage, deep roll marks, color differences, and white spots, with an inspection accuracy of up to 2 mm.