VISUAL INSPECTION APPARATUS

摘要

An automatic visual inspection apparatus has two linescan cameras (2 and 3). The cameras are positioned so that one views light specularly reflected by the surface of an object to be inspected, while the other views light diffusely reflected by the surface. The object is moved past the cameras so that the surface is scanned. The image signals from the cameras are acquired and processed by an imaging system (5). The locations of edges of the object in the images are detected, and the edge location data produced is used to control and modify the operation of the defect detection processing.