期刊
OPTICS AND LASERS IN ENGINEERING
卷 103, 期 -, 页码 127-138出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.optlaseng.2017.12.001
关键词
Motion artifacts; 3-D measurements; Fringe projection; Rigid objects; Phase-shifting profilometry
类别
资金
- National Key Technologies R&D Program of China [2017YFF0106403]
- National Natural Science Fund of China [61505081, 61705105, 111574152]
- Final Assembly 13th Five-Year Plan Advanced Research Project of China [30102070102]
- Outstanding Youth Foundation of Jiangsu Province of China [BK20170034]
- National Defense Science and Technology Foundation of China [0106173]
- Six Talent Peaks project of Jiangsu Province, China [2015-DZXX-009]
- 333 Engineering Research Project of Jiangsu Province, China [BRA2016407]
- Fundamental Research Funds for the Central Universities [30917011204, 30916011322]
- Jiangsu Key Laboratory of Spectral Imaging & Intelligent Sense [3091601410414]
- China Postdoctoral Science Foundation [2017M621747]
- Jiangsu Planned Projects for Postdoctoral Research Funds [1701038A]
Phase-shifting profilometry (PSP) is a widely used approach to high-accuracy three-dimensional shape measurements. However, when it comes to moving objects, phase errors induced by the movement often result in severe artifacts even though a high-speed camera is in use. From our observations, there are three kinds of motion artifacts: motion ripples, motion-induced phase unwrapping errors, and motion outliers. We present a novel motion-compensated PSP to remove the artifacts for dynamic measurements of rigid objects. The phase error of motion ripples is analyzed for the N-step phase-shifting algorithm and is compensated using the statistical nature of the fringes. The phase unwrapping errors are corrected exploiting adjacent reliable pixels, and the outliers are removed by comparing the original phase map with a smoothed phase map. Compared with the three-step PSP, our method can improve the accuracy by more than 95% for objects in motion. (C) 2017 Elsevier Ltd. All rights reserved.
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