Pang Xufang, Lau Rynson W H, Song Zhan, Li Yangyan, He Shengfeng
IEEE Comput Graph Appl. 2016 Jan-Feb;36(1):52-61. doi: 10.1109/MCG.2014.83. Epub 2014 Aug 15.
Turntable-based 3D scanners are popular but require calibration of the turntable axis. Existing methods for turntable calibration typically make use of specially designed tools, such as a chessboard or criterion sphere, which users must manually install and dismount. In this article, the authors propose an automatic method to calibrate the turntable axis without any calibration tools. Given a scan sequence of the input object, they first recover the initial rotation axis from an automatic registration step. Then they apply an iterative procedure to obtain the optimized turntable axis. This iterative procedure alternates between two steps: refining the initial pose of the input scans and approximating the rotation matrix. The performance of the proposed method was evaluated on a structured light-based scanning system.
基于转台的三维扫描仪很受欢迎，但需要对转台轴进行校准。现有的转台校准方法通常使用专门设计的工具，如棋盘或标准球体，用户必须手动安装和拆卸。在本文中，作者提出了一种无需任何校准工具即可校准转台轴的自动方法。给定输入物体的扫描序列，他们首先从自动配准步骤中恢复初始旋转轴。然后应用迭代过程来获得优化的转台轴。这个迭代过程在两个步骤之间交替：细化输入扫描的初始姿态和逼近旋转矩阵。在基于结构光的扫描系统上对所提方法的性能进行了评估。
