• Laser & Optoelectronics Progress
  • Vol. 60, Issue 8, 0811017 (2023)
Zhijun Zhang1、†, Qingyang Wu†、*, Yifan Jiang*, and Yifeng Deng*
Author Affiliations
  • College of Big Data and Internet, Shenzhen Technology University, Shenzhen 518118, Guangdong, China
  • show less
    DOI: 10.3788/LOP223426 Cite this Article Set citation alerts
    Zhijun Zhang, Qingyang Wu, Yifan Jiang, Yifeng Deng. [J]. Laser & Optoelectronics Progress, 2023, 60(8): 0811017 Copy Citation Text show less

    Abstract

    This paper presents a novel 3D measurement method for a light field camera (LFC) in which 3D information of object space is encoded by a microlens array (MLA). The light ray corresponding to each pixel of the LFC is calibrated. Once the matching points from at least two subviews exhibit sub-pixel accuracy, the 3D coordinates can be calculated optimally by intersecting light rays of these points matched through phase coding. Moreover, the proposed method obtains high-resolved results that exceed the subview resolution due to the virtual continuous phase search strategy. Finally, we combine the LFC and coaxial projection to solve the 3D data loss caused by shadowing and occlusion problems. Experimental results verify the feasibility of the proposed method, and the measurement error is about 30 μm in a depth range of 60 mm.
    X=a(u,v)Z+b(u,v)
    Y=c(u,v)Z+d(u,v)
    PW=argminPWR(u,v)RdR(u,v)(PW,R(u,v))2
    Zhijun Zhang, Qingyang Wu, Yifan Jiang, Yifeng Deng. [J]. Laser & Optoelectronics Progress, 2023, 60(8): 0811017
    Download Citation