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Large-scale structured light 3D shape measurement with reverse photography

机译：具有反向摄影的大规模结构光3D形状测量

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摘要

Combining the advantages of structured light and close range photogrammetry is an effective strategy for large-scale three-dimensional (3D) optical shape measurement. Several coded targets are typically required to be pasted on the object being tested, which induces several shortcomings. This paper proposes a structured light measurement technique based on reverse photography. An auxiliary reverse camera is installed behind the structured light system. When a single local measurement is performed, the reverse camera observes a large liquid crystal display (LCD) screen that is used as an oriented phase target. According to the multiple imaging constraints for the reverse camera, the local 3D shape data of multi-view structured light measurements are unified in a global frame defined on the LCD screen, achieving a holistic 3D shape data fusion. The proposed method possesses the advantage of reverse information transmission and pose transfer, achieving non-contact large-scale 3D shape measurement.
机译：结合结构光和近距离摄影测量的优点是大规模三维（3D）光学形状测量的有效策略。通常需要几个编码目标粘贴在所测试的物体上粘贴，这会引起几个缺点。本文提出了一种基于反向摄影的结构化光测量技术。辅助反向相机安装在结构化光系统后面。当执行单个局部测量时，反向摄像机观察用作定向相位目标的大型液晶显示器（LCD）屏幕。根据反向摄像机的多个成像约束，在LCD屏幕上定义的全局帧中统一多视图结构光测量的本地3D形状数据，实现整体3D形状数据融合。所提出的方法具有反向信息传输和姿势传输的优点，实现非接触式大规模3D形状测量。

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