1 May 2017 High-speed, high-accuracy large range 3D measurement
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This paper presents such a high-speed, high-accuracy structured light technique that could achieve large range 3D shape measurement. The enabling method is our recently proposed system calibration that splits the calibration process into two stages. Specifically, we calibrate the intrinsic parameters at a near position with a regular size yet precisely fabricated calibration target, and then calibrate the extrinsic parameters with the assistance of an additional large range yet low accuracy low cost 3D scanner (i.e., Kinect). We developed a system that achieved 500 Hz with a resolution 2304 × 1400. The field of view (FOV) of our structured light system is 0.9 m(W) × 1.4 m(H) × 0.8 m(D). Our experimental data demonstrated that such a large range structured light system can achieve an mean error of 0.13 mm with a standard deviation of 1.18 mm by measuring a 304.8 mm diameter sphere. We further experimentally demonstrated that proposed method can simultaneously measure multiple objects or large dynamically changing objects.
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Yatong An and Song Zhang "High-speed, high-accuracy large range 3D measurement", Proc. SPIE 10220, Dimensional Optical Metrology and Inspection for Practical Applications VI, 1022005 (1 May 2017); doi: 10.1117/12.2262680; https://doi.org/10.1117/12.2262680

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