中国物理B ›› 2019, Vol. 28 ›› Issue (8): 84202-084202.doi: 10.1088/1674-1056/28/8/084202

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Optimized dithering technique in frequency domain for high-quality three-dimensional depth data acquisition

Ning Cai(蔡宁), Zhe-Bo Chen(陈浙泊), Xiang-Qun Cao(曹向群), Bin Lin(林斌)   

  1. 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
  • 收稿日期:2019-04-10 修回日期:2019-04-24 出版日期:2019-08-05 发布日期:2019-08-05
  • 通讯作者: Bin Lin E-mail:wjlin@zju.edu.cn
  • 基金资助:
    Project supported by the Science and Technology Major Projects of Zhejiang Province, China (Grant No. 2017C31080).

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. 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
  • Received:2019-04-10 Revised:2019-04-24 Online:2019-08-05 Published:2019-08-05
  • Contact: Bin Lin E-mail:wjlin@zju.edu.cn
  • Supported by:
    Project supported by the Science and Technology Major Projects of Zhejiang Province, China (Grant No. 2017C31080).

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摘要： 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.

关键词: fringe generation, genetic algorithm, frequency domain, 3D shape measurement

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.

Key words: fringe generation, genetic algorithm, frequency domain, 3D shape measurement

中图分类号:  (Imaging and optical processing)

  • 42.30.-d
42.62.Eh (Metrological applications; optical frequency synthesizers for precision spectroscopy) 06.30.Ft (Time and frequency) 42.30.Rx (Phase retrieval)