Object orientation method based on hand-eye vision

This paper presents a new effective object orientation method using hand-eye vision system. First, we set a constant transformation matrix to describe the fixed correspondence of the end-effector reference frame and the robot-base reference frame. The constant matrix can then simplify the 3D orientation problem into 2D orientation problem in the case of keeping constant height while calibration. It greatly reduces the computation and increases the accuracy. When the position of end-effector has been changed, it can still implement orientation without the need of re-calibration. The experiment results show that this new method is highly accurate and reliable.