首页|Accurate fringe projection profilometry using instable projection light source
Accurate fringe projection profilometry using instable projection light source
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NSTL
Elsevier
? 2021 Elsevier B.V.Fringe projection profilometry (FPP) usually uses a projector with an instable light source due to the unsatisfactory driving power. As a result of the fluctuations of the projection light source, the fringe captured by a camera deviates from its ideal distribution, from which, the calculated phase has a random phase error, thus reducing the 3-D measurement accuracy. We found that the random phase error influences both the system calibration and the 3-D reconstruction, where the influence on the system calibration has not been previously noticed. In this paper, we formulate the phase error model of the phase-shifting algorithm caused by the fluctuations of the projection light source, and analyze its interference on calibration and reconstruction, respectively. From which, an accurate FPP using a combination of accurate calibration and accurate 3-D reconstruction is proposed, which are performed by using a deep learning-based phase calculation method. The provided experimental results verify that the proposed FPP can obviously improve the measurement accuracy.
Deep learningFringe projection profilometryInstable projection light
Han J.、Zhao Y.、Yu H.、Bai L.、Zheng D.
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School of Electronic and Optical Engineering Nanjing University of Science and Technology
NSTL
Elsevier
