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Proceedings Paper

New 3D high-accuracy optical coordinates measuring technique based on an infrared target and binocular stereo vision
Author(s): Jinjun Li; Hong Zhao; Qiang Fu; Pengfei Zhang; Xiang Zhou
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Paper Abstract

Three-dimension coordinates measuring is the key technique in modern manufacturing, reverse engineering, automation, precision measurement and computer aided surgery. In recent years, the 3D vision coordinates measurement becomes a newly technique and has been developed rapidly. Some vision coordinates measurement machines (VCMM) were developed. But measuring accuracy of those VCMMs is susceptible to the mal-condition and external noise, i.e. index point brilliance and ambient light illumination. We developed a new 3D high-precise optical coordinate measuring system based on an infrared target and two CCD cameras. Both measuring principle and linear direct reconstruction method of binocular stereo vision based on cross optical axes are discussed. The detail design and geometric model of the infrared target is proposed. The position and direction of the infrared target and 3D coordinates of the tip can be directly computed according to rigid geometric transformation. Further results of calibration and measurement are verified experimentally. A high geometrical accuracy can be reached.

Paper Details

Date Published: 17 June 2009
PDF: 11 pages
Proc. SPIE 7389, Optical Measurement Systems for Industrial Inspection VI, 738925 (17 June 2009); doi: 10.1117/12.824483
Show Author Affiliations
Jinjun Li, Xi'an Jiaotong Univ. (China)
Xi'an Research Institute of Hi-Tech (China)
Hong Zhao, Xi'an Jiaotong Univ. (China)
Qiang Fu, Xi'an Jiaotong Univ. (China)
Pengfei Zhang, Xi'an Jiaotong Univ. (China)
Xiang Zhou, Xi'an Jiaotong Univ. (China)

Published in SPIE Proceedings Vol. 7389:
Optical Measurement Systems for Industrial Inspection VI
Peter H. Lehmann, Editor(s)

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