Machine Vision System for Specular Surface Inspection

This technical report discusses a machine vision system designed for detecting surface defects on highly reflective industrial parts. The primary focus is on optimizing the lighting system, which is critical for accurately imaging defects such as dents, bumps, and scratches. The report outlines the challenges associated with inspecting reflective surfaces and presents a simulation process that aids in the design and optimization of the imaging conditions. The lighting principle employed involves structured lighting that helps differentiate defects from flawless areas by creating a contrast in captured images. The document details the imaging and segmentation processes, emphasizing the importance of a dynamic lighting structure to ensure comprehensive surface inspection. Additionally, it covers the modeling of lighting and imaging conditions using ray tracing to analyze image features. The findings indicate that well-designed lighting systems can significantly enhance defect detection efficiency, enabling real-time inspection at industrial production rates.