期刊
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
卷 66, 期 10, 页码 2755-2761出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIM.2017.2712862
关键词
Fringe analysis; phase error compensation; phase-shifting profilometry (PSP); profile measurement
资金
- Introducing Talents of Discipline to Universities [B12019]
- National Science Foundation of China [51375137]
- National Key Scientific Apparatus Development Project [2013YQ220893]
Due to the nonlinear response of digital phase-shifting profilometry (PSP), phase errors are inevitable in the retrieved 3-D profiles and result in negative impacts on the measurement accuracy of the PSP system. A novel method is presented in this paper to reduce the impact. Instead of compensating phase errors in the retrieved 3-D profile, specific harmonics are superimposed upon the initial fringe pattern actively to adjust the amplitudes of the harmonics in the captured fringe image with the intention to suppress the phase error, and all nonlinear response of the PSP system can be compensated in theory. Furthermore, it does not consume additional time in the 3-D profile reconstruction process. Experimental results are shown to demonstrate the validity of the method.
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