Abstract:

The noncontact realtime machine vision system enjoys stability and high precision.In this paper,the machine vision is used to study the localization and recognition of the workpiece.The center coordinates and rotation angles are obtained by solving the contour center moment and the minimum value of the two order derivative of the axis of the workpiece.The contour similarity metric function is used to identify the types of artifacts by extracting the template of artifacts Hu invariant moments and Hu invariant moments of the workpiece contour.The experimental results show that the workpiece can be accurately located and identified by the extraction of the workpiece contour.

Key words: workpiece position;workpiece recognition;contour extraction;rotation