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Optimized dithering technique in frequency domain for high-quality three-dimensional depth data acquisition |
Ning Cai(蔡宁)1,2, Zhe-Bo Chen(陈浙泊)2, Xiang-Qun Cao(曹向群)1, Bin Lin(林斌)1,2 |
1 State Key Laboratory of Modern Optical Instrumentation, CNERC for Optical Instruments, Zhejiang University, Hangzhou 310027, China; 2 Research Institute of Zhejiang University-Taizhou, Taizhou 318000, China |
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Abstract On the basis of the objective functions, dithering optimization techniques can be divided into the intensity-based optimization technique and the phase-based optimization technique. However, both types of techniques are spatial-domain optimization techniques, while their measurement performances are essentially determined by the harmonic components in the frequency domain. In this paper, a novel genetic optimization technique in the frequency domain is proposed for high-quality fringe generation. In addition, to handle the time-consuming difficulty of genetic algorithm (GA), we first optimize a binary patch, then join the optimal binary patches together according to periodicity and symmetry so as to generate a full-size pattern. It is verified that the proposed technique can significantly enhance the measured performance and ensure the robustness to various amounts of defocusing.
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Received: 10 April 2019
Revised: 24 April 2019
Accepted manuscript online:
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PACS:
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42.30.-d
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(Imaging and optical processing)
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42.62.Eh
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(Metrological applications; optical frequency synthesizers for precision spectroscopy)
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06.30.Ft
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(Time and frequency)
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42.30.Rx
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(Phase retrieval)
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Fund: Project supported by the Science and Technology Major Projects of Zhejiang Province, China (Grant No. 2017C31080). |
Corresponding Authors:
Bin Lin
E-mail: wjlin@zju.edu.cn
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Cite this article:
Ning Cai(蔡宁), Zhe-Bo Chen(陈浙泊), Xiang-Qun Cao(曹向群), Bin Lin(林斌) Optimized dithering technique in frequency domain for high-quality three-dimensional depth data acquisition 2019 Chin. Phys. B 28 084202
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