Abstract
This paper describes the visual inspection of glossy plastic parts using lighting technique and image processing. The method uses reflected image of lighting pattern on the glossy workpieces because small defects near/in the reflected image are visible. In this paper, the lighting pattern is stripe and the camera images are filtered by differential operators to remove the stripe pattern and extract the defect areas. The experimental results show the detection of small defects such as scratch, concavity and convexity on the glossy surfaces of the workpieces.
