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Proceedings Paper

Calibration target reconstruction for 3-D vision inspection system of large-scale engineering objects
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Paper Abstract

It is usually difficult to calibrate the 3-D vision inspection system that may be employed to measure the large-scale engineering objects. One of the challenges is how to in-situ build-up a large and precise calibration target. In this paper, we present a calibration target reconstruction strategy to solve such a problem. First, we choose one of the engineering objects to be inspected as a calibration target, on which we paste coded marks on the object surface. Next, we locate and decode marks to get homologous points. From multiple camera images, the fundamental matrix between adjacent images can be estimated, and then the essential matrix can be derived with priori known camera intrinsic parameters and decomposed to obtain camera extrinsic parameters. Finally, we are able to obtain the initial 3D coordinates with binocular stereo vision reconstruction, and then optimize them with the bundle adjustment by considering the lens distortions, leading to a high-precision calibration target. This reconstruction strategy has been applied to the inspection of an industrial project, from which the proposed method is successfully validated.

Paper Details

Date Published: 11 November 2010
PDF: 6 pages
Proc. SPIE 7855, Optical Metrology and Inspection for Industrial Applications, 78550V (11 November 2010); doi: 10.1117/12.870287
Show Author Affiliations
Yongkai Yin, Tianjin Univ. (China)
Xiang Peng, Shenzhen Univ. (China)
Tianjin Univ. (China)
Yingjian Guan, Tianjin Univ. (China)
Xiaoli Liu, Shenzhen Univ. (China)
Ameng Li, Shenzhen Univ. (China)

Published in SPIE Proceedings Vol. 7855:
Optical Metrology and Inspection for Industrial Applications
Kevin Harding; Peisen S. Huang; Toru Yoshizawa, Editor(s)

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