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Optical Engineering • Open Access

Calibration of structured light stripe system using plane with slits
Author(s): Jong-Eun Ha; Kang-Wook Her

Paper Abstract

Structured light stripe systems are widely used in industrial applications for acquiring three-dimensional (3-D) information. Calibration is the first necessary step and traditional algorithms compute the 4×3 transformation matrix from image to world. Therefore, 3-D information can be obtained with respect to the camera’s coordinate system, and it cannot be transformed into the laser coordinate system. We propose a new calibration algorithm of a structured light system that can compute the relative pose of the laser coordinate system with respect to the camera coordinate system. We can convert 3-D information either to the laser coordinate system or to the camera coordinate system. The proposed algorithm uses two planes where one plane with multiple slits is set perpendicular to the other plane. We can easily compute the position and rotation of the laser coordinate system using proposed calibration structure. Also, we can solve the extrinsic calibration using just one shot of an image while conventional algorithms require more than two images under different poses. Experiments under various configurations show the feasibility of proposed algorithm.

Paper Details

Date Published: 7 January 2013
PDF: 5 pages
Opt. Eng. 52(1) 013602 doi: 10.1117/1.OE.52.1.013602
Published in: Optical Engineering Volume 52, Issue 1
Show Author Affiliations
Jong-Eun Ha, Seoul National Univ. of Technology (Korea, Republic of)
Kang-Wook Her, Seoul National Univ. of Technology (Korea, Republic of)

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