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首页> 外文期刊>Optical engineering >Feature enhancement for a defocusing structured-light 3-D scanning system
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Feature enhancement for a defocusing structured-light 3-D scanning system

机译：散焦结构光3-D扫描系统的功能增强

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摘要

Structured-light systems consisting of a camera and projector are powerful and cost-effective tools for three-dimensional (3-D) shape measurements. However, most commercial projectors are unable to generate distinct patterns due to defocusing and shallow focusing issues. We propose a hybrid method for enhancing the calibration and scanning features of the defocusing structured-light 3-D scanning system. Instead of using conventional sequential binary patterns, we replace the highest-level binary pattern by a high-order sinusoidal pattern. In our proposed system, a pan-tilt stage carrying a checkerboard is used to assist the simultaneous calibration of the camera and projector. Initially, the camera is calibrated to obtain the extrinsic positions of the stage. In addition, we utilize the multiplication of vertical and horizontal stripe patterns to enhance the corresponding features between the camera and projector. The projector is then calibrated using the extrinsic features determined from the calibrated camera. The experimental results show that the use of the high-order sinusoidal pattern significantly improves reprojection error. Our proposed method can easily be incorporated in the defOCUSing projector for Scanning various types Of Objects.
机译：由照相机和投影仪组成的结构光系统是用于进行三维（3-D）形状测量的强大且经济高效的工具。但是，由于散焦和浅聚焦问题，大多数商用投影仪无法生成不同的图案。我们提出了一种混合方法，用于增强散焦结构光3-D扫描系统的校准和扫描功能。代替使用常规的顺序二进制模式，我们将高级二进制模式替换为高阶正弦模式。在我们提出的系统中，使用带有棋盘格的云台来辅助相机和投影仪的同时校准。最初，对摄像机进行校准以获得载物台的外部位置。此外，我们利用垂直和水平条纹图案的相乘来增强相机和投影仪之间的对应功能。然后，使用从校准后的相机确定的外部特征来校准投影机。实验结果表明，使用高阶正弦曲线模式可以显着改善重投影误差。我们提出的方法可以轻松地整合到去模糊投影仪中，以扫描各种类型的物体。

著录项

  • 来源
    《Optical engineering》 |2018年第6期|064101.1-064101.11|共11页
  • 作者

    Yu-Lun Liu; Tzung-Han Lin;

  • 作者单位

    National Taiwan University of Science and Technology, Graduate Institute of Applied Science and Technology, Taipei, Taiwan;

    National Taiwan University of Science and Technology, Graduate Institute of Color and Illumination Technology, Taipei, Taiwan,National Taiwan University of Science and Technology, High Speed 3D Printing Center, Taipei, Taiwan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    structured light; out of focus; feature enhancement;

    机译：结构化光失去重点;功能增强;

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