Latency and distortion of electromagnetic trackers for augmented reality systems

Resource Information

The work Latency and distortion of electromagnetic trackers for augmented reality systems represents a distinct intellectual or artistic creation found in Sydney Jones Library, University of Liverpool. This resource is a combination of several types including: Work, Language Material, Books.

Label

Latency and distortion of electromagnetic trackers for augmented reality systems

Statement of responsibility

Henry Himberg, Yuichi Motai

Creator

• Himberg, Henry

Contributor

• Motai, Yuichi.

Author

• Himberg, Henry
• Motai, Yuichi.

Subject

• calibration
• delta quaternion
• distributed body sensor
• extended Kalman filter
• head orientation
• head tracking
• human-computer interaction
• interacting multiple model estimator
• magnetic tracker
• motion tracking
• orientation
• position
• quaternion prediction
• real-time measurement
• AC magnetic tracking
• Augmented reality
• Tracking (Engineering)

Language

eng

Summary

Augmented reality (AR) systems are often used to superimpose virtual objects or information on a scene to improve situational awareness. Delays in the display system or inaccurate registration of objects destroy the sense of immersion a user experiences when using AR systems. AC electromagnetic trackers are ideal for these applications when combined with head orientation prediction to compensate for display system delays. Unfortunately, these trackers do not perform well in environments that contain conductive or ferrous materials due to magnetic field distortion without expensive calibration techniques. In our work we focus on both the prediction and distortion compensation aspects of this application, developing a small footprint predictive filter for display lag compensation and a simplified calibration system for AC magnetic trackers. In the first phase of our study we presented a novel method of tracking angular head velocity from quaternion orientation using an Extended Kalman Filter in both single model (DQEKF) and multiple model (MMDQ) implementations. In the second phase of our work we have developed a new method of mapping the magnetic field generated by the tracker without high precision measurement equipment. This method uses simple fixtures with multiple sensors in a rigid geometry to collect magnetic field data in the tracking volume. We have developed a new algorithm to process the collected data and generate a map of the magnetic field distortion that can be used to compensate distorted measurement data

Cataloging source

CaBNVSL

Dewey number

006.8

Illustrations

illustrations

Index

no index present

LC call number

QA76.9.A94

LC item number

H555 2014

Literary form

non fiction

Nature of contents

• dictionaries
• abstracts summaries
• bibliography

Target audience

• adult
• specialized