Dr. Yingchun Zhou Profile

Dr. Yingchun Zhou

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Proceedings Article | 12 April 2023 Paper

A low-cost system for fast 3D reconstruction based on laser speckle projection

Jiping Guo, Yingchun Zhou, Ameng Li, Junjie Zhang, Fan Zhang

Proceedings Volume 12565, 125651V (2023) https://doi.org/10.1117/12.2662511

KEYWORDS: Speckle, 3D modeling, 3D image reconstruction, 3D metrology, 3D image processing, Digital image correlation, Semiconductor lasers, Reconstruction algorithms

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Three-dimensional reconstruction based on speckle projection method can acquire 3D data by only one speckle image of object, which is suitable for measuring moving or deforming object, and has been widely used in many field. However, conventional speckle 3D reconstruction systems often require speckle projection devices with complex structures, which are relatively large in volume and high in cost. In addition, the digital image correlation algorithms used to search corresponding points, which is time-consuming and not conducive to rapid acquisition of 3D data. In this paper, a low-cost laser speckle 3D reconstruction system is built by using semiconductor lasers. At the same time, by optimizing the image correction and sub-pixel matching optimization algorithms, the corresponding points searching can be done more quickly, which improves the efficiency and accuracy of speckle 3D reconstruction. The experiments proves that the low-cost laser speckle 3D reconstruction system presented can effectively realize fast 3D digital imaging and measurement, largely promote the time efficiency of 3D data calculation, and the measurement error can reach ±0.3mm, which can meet the requirements of miniaturization and low-cost applications with low accuracy requirements.

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