Shao Mingwei
J Opt Soc Am A Opt Image Sci Vis. 2020 Jul 1;37(7):1076-1082. doi: 10.1364/JOSAA.391906.
A three-dimensional laser scanner has been designed and widely utilized in many fields. The lens plane is tilted according to the Scheimpflug condition and the optical axis is not perpendicular to the charge-coupled device plane. In this case, depth of view can be extended significantly. In this paper, analytical models for a camera with a tilted lens and a laser scanner meeting the Scheimpflug condition are presented. Based on these models, a calibration procedure is detailed. We propose a simple calibration method to determine the intrinsic parameters of a Scheimpflug camera. Meanwhile, two calibration methods for a laser scanner in the Scheimpflug condition are detailed. According to the obtained intrinsic parameters, the laser scanner can be calibrated directly. Moreover, a simple calibration for a three-dimensional laser scanner without the help of a precise positioning system is described. Experimental results show the effectiveness and high measurement accuracy of our calibration methods.
一种三维激光扫描仪已被设计出来并在许多领域得到广泛应用。透镜平面根据谢宾夫鲁格条件倾斜，且光轴不垂直于电荷耦合器件平面。在这种情况下，视场深度可以显著扩展。本文提出了具有倾斜透镜的相机和满足谢宾夫鲁格条件的激光扫描仪的分析模型。基于这些模型，详细介绍了一种校准程序。我们提出了一种简单的校准方法来确定谢宾夫鲁格相机的内参。同时，详细介绍了两种用于处于谢宾夫鲁格条件下的激光扫描仪的校准方法。根据获得的内参，可以直接对激光扫描仪进行校准。此外，还描述了一种无需精密定位系统帮助的三维激光扫描仪的简单校准方法。实验结果表明了我们校准方法的有效性和高测量精度。
