IMAGE PROCESSING DEVICE AND ITS PROCESSING METHOD

摘要

PROBLEM TO BE SOLVED: To detect a defect part accurately without being influenced by the shape of an inspection object surface, the forming direction of a flaw or the like, or the like. SOLUTION: The defect part is detected from the changing rate of a brightness gradient of a gradation pattern acquired by projecting the inspection object surface through a screen 3 where plural regular-hexagonal patterns are printed closely in the honeycomb shape and the concentric gradation patterns are printed on the respective regular-hexagonal patterns.