High-precision structured-light 3D measurement method based on multi-view Scheimpflug imaging

被引：0
|
作者：
Liu Y. [1 ]
Zhang G. [1 ]
Hu P. [1 ]
Deng H. [1 ]
Yang S. [1 ]
机构：
[1] State Key Laboratory for Manufacturing Systems Engineering, Xi′an Jiaotong University, Xi′an
来源：
Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument | 2023年 / 44卷 / 03期
关键词：
3D measurement; multi-view geometry; phase-shifting fringe projection; Scheimpflug imaging; system calibration;
D O I：
10.19650/j.cnki.cjsi.J2210821
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
Traditional structured-light (SL) measurement methods face challenges in measuring surface with high reflectivity and complex structure. The measurement accuracy is limited by the measurement field of view. This article proposes a high-precision calibration and 3D measurement method based on structured-light projection and multi-view Scheimpflug imaging, which can make full use of the depth range of the system. A novel structured-light multi-view stereo measurement model is proposed. The projector coordinate system is used as the measurement coordinate system, and the multi-view structured-light system is calibrated in an integrated way by establishing the corresponding relationship of "3D point-projection image point-4 camera image points". With the use of multi-view geometric imaging constraints, the observation information of multiple perspectives is fused by calculating the least square solution to improve the calculation accuracy of 3D data. Experimental results show that the proposed method and system can accurately measure high reflectivity and occluded surfaces, with a measurement accuracy of 5 μm, which is substantially superior to the traditional SL methods. © 2023 Science Press. All rights reserved.
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页码：33 / 40
页数：7
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