Title: High-speed 3D shape measurement using the optimized composite fringe patterns and stereo-assisted structured light system

Abstract

In this study, we propose a high-speed 3D shape measurement technique based on the optimized composite fringe patterns and stereo-assisted structured light system. Stereo phase unwrapping, as a new-fashioned method for absolute phase retrieval based on the multi-view geometric constraints, can eliminate the phase ambiguities and obtain a continuous phase map without projecting any additional patterns. However, in order to ensure the stability of phase unwrapping, the period of fringe is generally around 20, which limits the accuracy of 3D measurement. To solve this problem, we develop an optimized method for designing the composite pattern, in which the speckle pattern is embedded into the conventional 4-step phase-shifting fringe patterns without compromising the fringe modulation, and thus the phase measurement accuracy. We also present a simple and effective evaluation criterion for the correlation quality of the designed speckle pattern in order to improve the matching accuracy significantly. When the embedded speckle pattern is demodulated, the periodic ambiguities in the wrapped phase can be eliminated by combining the adaptive window image correlation with geometry constraint. Finally, some mismatched regions are further corrected based on the proposed regional diffusion compensation technique (RDC). These proposed techniques constitute a complete computational framework that allows tomore » effectively recover an accurate, unambiguous, and distortion-free 3D point cloud with only 4 projected patterns. Experimental results verify that our method can achieve high-speed, high-accuracy, robust 3D shape measurement with dense (64-period) fringe patterns at 5000 frames per second.« less

Authors:

Yin, Wei ^[1]; Feng, Shijie ^[1]; Tao, Tianyang  ^[1];

• Search DOE PAGES for author "Tao, Tianyang"
• Search DOE PAGES for ORCID "0000-0003-1122-5785"

Huang, Lei  ^[2];

• Search DOE PAGES for author "Huang, Lei"
• Search DOE PAGES for ORCID "0000-0002-5645-5173"

Trusiak, Maciej  ^[3];

• Search DOE PAGES for author "Trusiak, Maciej"
• Search DOE PAGES for ORCID "0000-0002-5907-0105"

Chen, Qian  ^[1];

• Search DOE PAGES for author "Chen, Qian"
• Search DOE PAGES for ORCID "0000-0002-1909-302X"

Zuo, Chao  ^[1]

• Search DOE PAGES for author "Zuo, Chao"
• Search DOE PAGES for ORCID "0000-0002-1461-0032"

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+ Show Author Affiliations

1. Nanjing Univ. of Science and Technology, Jiangsu Province (China)
2. Brookhaven National Lab. (BNL), Upton, NY (United States)
3. Warsaw Univ. of Technology, Warsaw (Poland)

Publication Date:

Fri Jan 25 00:00:00 EST 2019

Research Org.:

Brookhaven National Lab. (BNL), Upton, NY (United States)

Sponsoring Org.:

USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:

1497384

Report Number(s):

BNL-211310-2019-JAAM
Journal ID: ISSN 1094-4087; OPEXFF

Grant/Contract Number:  

SC0012704

Resource Type:

Accepted Manuscript

Journal Name:

Optics Express

Additional Journal Information:

Journal Volume: 27; Journal Issue: 3; Journal ID: ISSN 1094-4087

Publisher:

Optical Society of America (OSA)

Country of Publication:

United States

Language:

English

Subject:

42 ENGINEERING