Towards retooling the microsoft hololens as outdoor AR and MR device

This research work covers generic approaches for the determination of the outdoor position and orientation of an augmented reality device due to the lack of outdoor capability of depth-sensor based devices currently available on the market. The determination of the orientation is primarily achieved with an attitude heading reference system (AHRS) for a rough estimation. Based on a connected/inbuild video camera the accuracy at minor changes of the orientation is enhanced applying registration to assess the differences in orientation between two video frames, compensating gyroscope drift errors. The position determination is achieved using GPS with a rover- and base station real time kinematic beacon system to achieve enhanced precision. Results show that due to sensor application AR hardware considered for indoor use can be retooled to properly work outdoors, at large distances and even inside running vehicles. Thus, future implementation of applications in various domains is facilitated.