Structured light technology based on gray code and six-step phase shift method

Sun Bangyong; Wu Siyuan

doi:10.11884/HPLPB202133.200242

Volume 33 Issue 2

Jan. 2021

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Sun Bangyong, Wu Siyuan. Structured light technology based on gray code and six-step phase shift method[J]. High Power Laser and Particle Beams, 2021, 33: 021004. doi: 10.11884/HPLPB202133.200242

Citation:

Sun Bangyong, Wu Siyuan. Structured light technology based on gray code and six-step phase shift method[J]. High Power Laser and Particle Beams, 2021, 33: 021004. doi: 10.11884/HPLPB202133.200242

Sun Bangyong, Wu Siyuan. Structured light technology based on gray code and six-step phase shift method[J]. High Power Laser and Particle Beams, 2021, 33: 021004. doi: 10.11884/HPLPB202133.200242

Citation:

Sun Bangyong, Wu Siyuan. Structured light technology based on gray code and six-step phase shift method[J]. High Power Laser and Particle Beams, 2021, 33: 021004. doi: 10.11884/HPLPB202133.200242

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Structured light technology based on gray code and six-step phase shift method

doi: 10.11884/HPLPB202133.200242

Sun Bangyong^{1, 2
,},
Wu Siyuan^2
,

1.
College of Printing, Packaging Engineering and Digital Media, Xi’an University of Technology, Xi’an 710048, China
2.
Key Laboratory of Spectral Imaging Technology, Xi'an Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Received Date: 2020-08-19
Rev Recd Date: 2020-12-18
Publish Date: 2021-01-07

Abstract

Abstract

Structured light technology is a typical method for capturing the three-dimensional point cloud data of realistic objects. Structured light images are projected on the surface of the object, which are modulated by the height of the object. Then, the modulated structured light is captured by the camera. Finally, the triangulation principle is used to calculate the three-dimensional surface shape data. To scan the high-precision three-dimensional point cloud of the object, this paper proposes a structured light technology based on Gray code and six-step phase shift method. The structured light based on Gray code is composed of 7 black and white fringe periodic images, and the image can be divided into 128 areas through the gray code decoding operation; the structured light based on six-step phase shift is composed of 6 cosine periodic images with phase difference. Phase shift decoding can subdivide each of the 128 areas into a single pixel. Compared with the cumbersome calculation of six Moiré fringes, the proposed structured light technology based on six-step phase-shift method has less calculation. In the simulation experiment and actual test, the proposed structured light technology showed excellent performance.
- principle of triangulation,
- six-step phase shift,
- Gray code,
- structured light,
- cloud point

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References(14)

References

[1]	Wilm J, Olesen O V, Larsen R. SLStudio: Open-source framework for real-time structured light[C]//IEEE International Conference on Image Processing Theory. 2014: 1-4.
[2]	Gu Q, Herakleous K, Poullis C. 3DUNDERWORLD-SLS: An open-source structured-light scanning system for rapid geometry acquisition[J]. EprintArxiv, 2014.
[3]	Scharstein D, Szeliski R. High-accuracy stereo depth maps using structured light[C]//IEEE Conference on Computer Vision and Pattern Recognition. 2003: 1-1.
[4]	Zhang Q, Su X, Xiang L, et al. 3-D shape measurement based on complementary Gray-code light[J]. Optics and Lasers in Engineering, 2012, 50(4): 574-579.
[5]	Sansoni G, Carocci M, Rodella R. Three-dimensional vision based on a combination of gray-code and phase-shift light projection: analysis and compensation of the systematic errors[J]. Appl Opt, 1999, 38(31): 6565-6573.
[6]	Lin H, Ma Z F, Yao C H, et al. 3D measurement technology based on binocular vision using a combination of gray code and phase-shift structured light[J]. Acta Electronica Sinica, 2013, 41(1): 24-28.
[7]	Xi Juntong. Phase error compensation method using smoothing spline approximation for a three-dimensional shape measurement system based on gray-code and phase-shift light projection[J]. Optical Engineering, 2008, 47(11): 1273-1279.
[8]	Yu Xiaoyang, Wu Haibin, Yin Liping. 3D measurement technology based on structured light by combining Gray code with phase-shift[J]. Chinese Journal of Scientific Instrument, 2007, 28(12): 2152.
[9]	Veksler, O. Stereo correspondence by dynamic programming on a tree[C]//IEEE Conference on Computer Vision and Pattern Recognition. 2005.
[10]	Gimel"Farb G. Probabilistic regularisation and symmetry in binocular dynamic programming stereo[J]. Pattern Recognition Letters, 2002, 23(4): 431-442.
[11]	Wang L, Liao M, Gong M, et al. High-quality real-time stereo using adaptive cost aggregation and dynamic programming[C]//International Symposium on 3D Data Processing, Visualization and Transmission. 2006: 798-805.
[12]	敖黎铭, 徐晓, 李熙. 双目结构光高精度三维复原算法的快速实现[J]. 传感器与微系统, 2018, 316(6):134-136. (Ao Liming, Xu Xiao, Li Xi. Fast implementation of high precision 3D restoration algorithm based on binocular structured light[J]. Transducer and Microsystem Technology, 2018, 316(6): 134-136
[13]	王长波, 谢明红. 格雷编码与相移结合的双目三维重构[J]. 计算机工程, 2013, 39(5):178-182. (Wang Changbo, Xie Minghong. Binocular three-dimension reconstruction combined with Gray coding and phase-shift[J]. Computer engineering, 2013, 39(5): 178-182 doi: 10.3969/j.issn.1000-3428.2013.05.039
[14]	张广军, 王红. 结构光三维视觉系统研究[J]. 航空学报, 1999, 20(4):365-367. (Zhang Guangjun, Wang Hong. Structured light 3D vision[J]. Acta Aeronautica et Astronautica Sinica, 1999, 20(4): 365-367 doi: 10.3321/j.issn:1000-6893.1999.04.019