Morteza Ghazisaedy

This paper describes a system for calibrating the position component of a 6-degree-of-freedom magnetic tracker by comparing the output with a custom-built ultrasonic measuring system. A look-up table, created from the collected difference data, is used to interpolate for corrected values. The error of the resulting corrected magnetic tracker position is measured to be less than 5% over the calibrated range. Keywords: Virtual reality, CAVE, magnetic tracker, ultrasonic tracker I. INTRODUCTION A. Purpose and Motivation A goal of any virtual reality (VR) system is to make user control of the environment as natural as possible. Accurate tracking is needed for VR systems to generate correctly sized and oriented perspective views, to allow user picking of objects, and to facilitate navigation. B. Background There are 3 major types of tracking devices that detect both position and angular orientation. 1 - Mechanical Linkages. Mechanical linkage systems use an arm-like structure composed of se..