semantic_scholare-Journal of Nondestructive Testing2026-08-01
BRDF-Based Photometric Stereo with AI Anomaly Detection for Fine Defect Inspection on Painted Electronic Buttons
Taesan Mo, Penghua Zhang, Seohyeon Jeong, Yeseul Kong, Gyuhae Park
TL;DR: A BRDF-based Photometric Stereo approach that accounts for complex reflectance characteristics when capturing fine geometric features of painted button surfaces, effectively enhancing the detectability of micro-defects that are visually indistinct in painted automotive components.
Ensuring the visual appearance quality of automotive interior buttons requires reliable inspection of painted surfaces. However, powder-coated finishes present complex reflectance behaviors, including directional glare and irregular highlight patterns, which often mask or resembl…