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Scientific Programming
Volume 2017, Article ID 1526706, 8 pages
Research Article

Field Geometric Calibration Method for Line Structured Light Sensor Using Single Circular Target

1School of Electrical Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China
2College of Computer and Communication Engineering, Zhengzhou University of Light Industry, Zhengzhou, Henan 450002, China
3Marine Engineering Institute, Jimei University, Xiamen, Fujian 361021, China

Correspondence should be addressed to Tianfei Chen; moc.361@iefnait_nehc

Received 17 October 2017; Accepted 11 December 2017; Published 31 December 2017

Academic Editor: Shangguang Wang

Copyright © 2017 Tianfei Chen et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


To achieve fast calibration of line structured light sensor, a geometric calibration approach based on single circular calibration target is proposed. The proposed method uses the circular points to establish linear equations, and according to the angle constraint, the camera intrinsic parameters can be calculated through optimization. Then, the light plane calibration is accomplished in two steps. Firstly, when the vanishing lines of target plane at various postures are obtained, the intersections between vanishing lines and laser stripe can be computed, and the normal vector of light plane can be calibrated via line fitting method using intersection points. After that, the distance from the origin of camera coordinate system to the light plane can be derived based on the model of perspective-three-point. The actual experimental result shows that this calibration method has high accuracy, its average measuring accuracy is 0.0451 mm, and relative error is 0.2314%. In addition, the entire calibration process has no complex operations. It is simple, convenient, and suitable for calibration on sites.