虚拟现实系统中电磁跟踪器的球坐标校正方法(英文)

Calibration Scheme Under Spherical Coordinates for Magnetic Tracker Used in VR System

描述了一个以球坐标的方式对虚拟现实系统中电磁跟踪器进行校正的方法 .首先建立一个球坐标系下被跟踪对象的测量位置和实际位置的对照表 ,然后以二维插值的方式利用此对照表中的数据对测量数据进行校正 .此方法能够有效地校正电磁跟踪系统中的静态误差 。

A calibration scheme under spherical coordinates is described for a magnetic tracker used in VR (virtual reality) system. A look up table containing data of tracked values for certain positions in the working space, spe cified in spherical coordinates, is generated first, which is then used to calibrate the tracking results by a two dimensional interpolation. The scheme can effectively correct the static errors in the magnetic tracking system. The employment of spherical coordinates significantly reduces the calculation complexity in calibration.