A Low Cost Eye Tracking System for Monitoring Eye Fixation

声明

摘要

ABSTRACT

Table of Contents

LIST OF FIGURES

Chapter 1 Introduction

1．1 Introduction

1．2 Goals of this Thesis

1．3 Related Work

1．4 Thesis Roadmap

Chapter 2 Background

2．1 Human Eye Anatomy

2．2 Eye Muscles(Extraocular muscles)

2．3 Eye Movements

2．3．1 Saccades

2．3．2 Smooth Pursuit

2．3．3 Fixation

2．4 Visual angle

2．5 History of Eye Tracking

2．6 Eye Tracking Approaches

2．6．1 Electrooculography

2．6．2 Seleral Search Coils

2．6．3 Infrared oculography

2．6．4 Video oculography

2．7 Head Mounted Eye Tracking Systems

2．7．1 Corneal Reflection

2．7．2 Gaze Estimation

2．7．3 Head Mounted System Calibration

2．7．4 Gaze Data presentation and Storage

2．7．5 Gaze Data Analysis

2．7．6 Eye Tracker Data Quality

2．8 Chapter Summary

Chapter 3 Eye Tracker Head Gear

3．1 Hardware List

3．1．1 Cameras

3．1．2 Eye Tracker Frame

3．1．3 IR-LEDS

3．1．4 IR-Pass Filter

3．1．5 USB-HUB

3．1．6 CubieboardA20(for offiine recording)

3．1．7 Micro-SD card(offiine Storage)

3．1．8 Rechargeable battery pack

3．1．9 Other tools

3．2 Prepare the Headgear parts

3．2．1 Disassemble the webcams

3．2．2 Eye Camera Modification

3．2．3 Modify the Goggle(head-gear frame)

3．2．4 Attach the camera to the frame

3．2．5 Prepare Cubieboard for offiine tracking

3．3 Potential Optical radiation Hazards of IR light

3．4 Chapter Summary

Chapter 4 Eye Tracker System Design

4．1 Pupil Localization

4．2 Pupil Segmentation

4．3 Feature extractions

4．4 Ellipse fitting

4．5 Calibration and Mapping

4．6 Gaze Data and Heat Maps

4．7 Chapter Summary

Chapter 5 Eye Tracker System Implementation

5．1 Overview of the Application Frameworks

5．1．1 OpenCV

5．1．2 Threading Building Blocks(TBB)

5．1．3 Boost (C++libraries)

5．1．4 Qt Application Framework

5．2 Tracking System Application

5．2．1 Eye Tracker Main Application

5．2．2 CamerasHandling

5．2．3 Pupil Processing

5．2．4 Tracker Calibration

5．2．5 Gaze Data-logging

5．2．6 Play Heat Maps

5．3 Chapter Summary

Chapter 6 SystemEvaluation

6．1 Hardware configurations

6．2 Video Stream Synchronization and System Latency

6．4 Eye Tracker Spatial Precision

6．5 Head Gear Operating Trial

6．6 Chapter Summary

Chapter 7 Future Work and Conclusion

7．1 Future Work

7．2 General Discussion and Conclusion

References

Appendix

Appendix 1：OpenCV Configuration on Debian Linux

Appendix 2：Linking Qt libraries and OpenCV

Acknowledgments