Applications Stereo vision system for precision dimensional inspection of 3D holes

Abstract. This paper presents a machine vision system for the high-accuracy 3D measurement of holes on the surface of industrial components. This is a very important application for inline quality inspection in assembly plants.A CAD-based stereo vision approach is adopted. The introduction of several novel techniques enables the system to achieve high robust-ness in versatile industrial environments, rapid response, and accuracy below 0.1mm. These are demonstrated by extensive experiments with synthetic and real data