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1 May 2008 Accurate calibration method for a structured light system
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System calibration is crucial for any 3-D shape measurement system. An accurate method is proposed to calibrate a 3-D shape measurement system based on a structured light technique. The projector is treated as a camera to unify the calibration procedures of a structured light system and a well-established stereo vision system. The key to realizing this method is to establish a highly accurate correspondence between camera pixels and projector pixels and generate digital micromirror device (DMD) image sets for projector calibration. A phase-shifting method is used to accomplish this task. A precalibrated lookup table and a linear interpolation algorithm are proposed to improve the accuracy of the generated DMD image, and accordingly improve the accuracy of the projector calibration and the 3-D measurement. Some experimental results are presented to demonstrate the performance of the system calibration.
©(2008) Society of Photo-Optical Instrumentation Engineers (SPIE)
Zhongwei Li, Yusheng Shi, Congjun Wang, and Yuanyuan Wang "Accurate calibration method for a structured light system," Optical Engineering 47(5), 053604 (1 May 2008).
Published: 1 May 2008

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