Development of a 3D High-Precise Positioning System Based on a Planar Target and Two CCD Cameras

Authors:
Jinjun Li;Hong Zhao;Tao Jiang;Xiang Zhou
Affiliations:
State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an, 710049 and Xi'an Research Inst. of Hi-tech, Xi'an, 710025;State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an, 710049;State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an, 710049;State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an, 710049
Venue:
ICIRA '08 Proceedings of the First International Conference on Intelligent Robotics and Applications: Part II
Year:
2008

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Abstract

Three-dimension positioning and coordinates measuring is the key technique in modern manufacturing, reverse engineering, automation, precision measurement and computer aided surgery. This paper presents a positioning system based on a planar target and two CCD cameras. The binocular stereo vision measuring principle is proposed. Planar scene geometry and the Direct Reference Plane (DRP) method for the calibrated cameras are discussed. The 3D plane can be reconstructed according to the DRP method and 3D coordinates of the contact head on Planar Target can be directly computed according to rigid geometric transformation. We also develop a new three-step calibration method for matrices and distortion factors of the two cameras using coplanar feature points. Further results of calibrating and measuring are verified experimentally.