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基于彩色编码光栅投影的双N步相移轮廓术

王建华 杨延西

王建华, 杨延西. 基于彩色编码光栅投影的双N步相移轮廓术[J]. 中国光学(中英文), 2019, 12(3): 616-627. doi: 10.3788/CO.20191203.0616
引用本文: 王建华, 杨延西. 基于彩色编码光栅投影的双N步相移轮廓术[J]. 中国光学(中英文), 2019, 12(3): 616-627. doi: 10.3788/CO.20191203.0616
WANG Jian-hua, YANG Yan-xi. Double N-step phase-shifting profilometry using color-encoded grating projection[J]. Chinese Optics, 2019, 12(3): 616-627. doi: 10.3788/CO.20191203.0616
Citation: WANG Jian-hua, YANG Yan-xi. Double N-step phase-shifting profilometry using color-encoded grating projection[J]. Chinese Optics, 2019, 12(3): 616-627. doi: 10.3788/CO.20191203.0616

基于彩色编码光栅投影的双N步相移轮廓术

doi: 10.3788/CO.20191203.0616
基金项目: 

国家自然科学基金项目 51275405

详细信息
    作者简介:

    王建华(1981-), 男, 山东临沂人, 博士研究生, 2004年于中国地质大学获得学士学位, 2011年于中国矿业大学获得硕士学位, 主要从事光学三维测量和智能机器人方面的研究。E-mail:wjh051130@163.com

    杨延西(1975-), 男, 山东郓城人, 教授, 博士生导师, 2003年于西安理工大学获得博士学位, 主要从事复杂系统控制、机器视觉和智能机器人方面的研究。E-mail:yangyanxi@xaut.edu.cn

  • 中图分类号: TP391;TH741

Double N-step phase-shifting profilometry using color-encoded grating projection

Funds: 

National Natural Science Foundation of China 51275405

More Information
  • 摘要: 双N步相移轮廓术虽然可以大大降低由于光栅条纹的非正弦性所导致的相位误差,但增加了一倍的投影条纹数量,降低了测量效率。针对此问题,本文提出一种基于彩色编码光栅投影的双N步相移轮廓术,它将原相移条纹和附加相移条纹编码成双色条纹,融合到一幅彩色光栅条纹中投影,然后从采集的彩色条纹中提取两套条纹的相位信息,分别解包裹相位后,融合两包裹相位以减小相位误差。为验证所提方法的有效性,将该方法与两种典型的相位展开算法结合进行实验。实验结果证明,所提方法能有效降低相位误差,且不需要增加任何额外的光栅条纹,测量效率提高了46%。

     

  • 图 1  包裹相位和展开相位的一行

    Figure 1.  A line of wrapped phase and unwrapped phase

    图 2  彩色光栅条纹形成示意图

    Figure 2.  Schematic of color-encoded grating fringe formation

    图 3  彩色光栅条纹的生成、投影、采集和GB分量提取

    Figure 3.  Generation, projection, capture and GB component extraction of color-encoded grating fringe

    图 4  双步相移法的相位融合

    Figure 4.  Phase fusion of double step phase-shifting method

    图 5  三维测量系统

    Figure 5.  Three-dimensional measurement system

    图 6  相移法与枝切法结合解相位

    Figure 6.  Phase calculation by the combination of phase-shifting method and branch-cut method

    图 7  三频外差法的原理

    Figure 7.  Principle of three-frequency heterodyne method

    图 8  相移法与三频外差法结合解相位

    Figure 8.  Phase calculation by the combination of phase-shifting and three-frequency heterodyne method

    图 9  红色采集条纹的颜色串扰

    Figure 9.  Color crosstalk of red grating fringe

    表  1  条纹数量

    Table  1.   The number of fringes

    算法 双N步相移与枝切法解相位 双N步相移与三频外差法解相位
    条纹颜色 灰度条纹 彩色条纹 灰度条纹 彩色条纹
    条纹数量 8 4 24 12
    下载: 导出CSV
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出版历程
  • 收稿日期:  2018-08-06
  • 修回日期:  2018-09-29
  • 刊出日期:  2019-06-01

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