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Method for large-scale structured-light system calibration
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DOI：10.1364/OE.422327.png)
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Abstract
En 中文
We propose a multi-stage calibration method for increasing the overall accuracy of a large-scale structured light system by leveraging the conventional stereo calibration approach using a pinhole model. We first calibrate the intrinsic parameters at a near distance and then the extrinsic parameters with a low-cost large-calibration target at the designed measurement distance. Finally, we estimate pixel-wise errors from standard stereo 3D reconstructions and determine the pixel-wise phase-to-coordinate relationships using low-order polynomials. The calibrated pixel-wise polynomial functions can be used for 3D reconstruction for a given pixel phase value. We experimentally demonstrated that our proposed method achieves high accuracy for a large volume: sub-millimeter within 1200(H) x 800 (V) x 1000(D) mm(3). (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
Keywords:
PROJECTION
ACCURACY
Journal
IF:
3.3
Papers:
6.1W
Citations:
14.3W
