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Calibration method for panoramic 3D shape measurement with plane mirrors.

Wei Yin, Shijie Feng, Tianyang Tao

    Optics Express
    |December 25, 2019
    PubMed
    Summary

    A new flexible calibration technique simplifies panoramic 3D shape measurement using fringe projection profilometry (FPP) with plane mirrors. This method enables accurate 3D reconstruction from multiple perspectives for enhanced object modeling.

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    Area of Science:

    • Optics and Photonics
    • Computer Vision
    • Metrology

    Background:

    • Traditional fringe projection profilometry (FPP) enables 3D shape measurement.
    • Integrating plane mirrors into FPP systems allows for simultaneous multi-perspective capture, creating panoramic 3D models.
    • Calibrating these complex mirror-integrated FPP systems is challenging.

    Purpose of the Study:

    • To introduce a novel and flexible calibration technique for panoramic 3D shape measurement systems utilizing plane mirrors.
    • To mathematically represent plane mirrors and demonstrate a method for deriving the reflection matrix using observed feature points.
    • To enable automatic alignment of 3D point cloud data from real and virtual perspectives for seamless panoramic model generation.

    Main Methods:

    • Mathematical modeling of plane mirrors and their reflection properties.
    • Development of a calibration procedure requiring observation of real and virtual feature point pairs.
    • Implementation of a system to calibrate virtual and real cameras within a unified world coordinate system.
    • Experimental verification of the proposed calibration technique's performance.

    Main Results:

    • A robust mathematical framework for plane mirror representation in FPP systems was established.
    • The proposed method successfully derives the reflection matrix from observed feature point pairs.
    • Automatic alignment of 3D point clouds from multiple perspectives was achieved.
    • Experimental validation confirmed the technique's effectiveness for panoramic 3D shape measurement.

    Conclusions:

    • The developed calibration technique offers a flexible and effective solution for complex panoramic FPP systems.
    • Accurate calibration facilitates the generation of high-quality, aligned panoramic 3D models.
    • This advancement simplifies the process of achieving high-speed, comprehensive 3D shape measurement.