期刊
OPTICS EXPRESS
卷 28, 期 17, 页码 24363-24378出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.398814
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资金
- National Key Research and Development Program of China [2017YFF0106403]
- National Natural Science Foundation of China [111574152, 61705105, 61722506]
- Fundamental Research Funds for the Central Universities [30916011322, 30917011204]
- '333 Engineering' research project of Jiangsu Province, China [BRA2015294, BRA2016407]
- 'Six Talent Peaks' project of Jiangsu Province, China [2015-DZXX-009]
- National Defense Science and Technology Foundation of China [0106173]
- Outstanding Youth Foundation of Jiangsu Province of China [BK20170034]
- Key Research and Development Program of Jiangsu Province, China [BE2017162]
- Equipment Advanced Research Fund of China [61404150202]
- Final Assembly '13th Five-Year Plan' Advanced Research Project of China [30102070102]
Fringe projection profilometry (FPP) is a widely used technique for real-time three-dimensional (3D) shape measurement. However, it tends to compromise when measuring objects that have a large variation range of surface reflectivity. In this paper, we present a FPP method that can increase the dynamic range for real-time 3D measurements. First, binary fringe patterns are projected to generate grayscale sinusoidal patterns with the defocusing technique. Each pattern is then captured twice with different exposure values in one projection period. With image fusion, surfaces under appropriate exposure are retained. To improve the real-time performance of high dynamic range (HDR) 3D shape measurements, we build a binocular fringe projection profilometry system that saves the number of patterns by geometry constraint. Further, to ensure the accuracy and robustness of HDR 3D measurements, we propose a mixed phase unwrapping method that can reduce phase unwrapping errors for dense fringe patterns. Experiment results show that the proposed method can realize accurate and real-time 3D measurement for HDR scenes at 28 frames per second. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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