Eye Tracking System on Embedded Platform Matj ern Department of - - PowerPoint PPT Presentation

Department of Electrical Engineering 4.12. 2013

Eye Tracking System

• n Embedded Platform

Matěj Černý

Department of Electrical Engineering 4.12. 2013

INTRODUCTION

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• Main motivation for this system was the need for

high definition image of eye which is fundamental for accurate gaze tracker.

• Accurate gaze tracker can be used to control PC with

common GUI by gaze to help disabled people interact with PC or to improve PC work efficiency.

• High definition image is acquired from PTZ camera

which is controlled by output of Eye Tracker.

• System should be composed of common components

and should have compact dimensions, for easy use and implementation.

Department of Electrical Engineering 4.12. 2013

OBJECTIVES

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• Evaluate eye position on embedded platform from

image from standard webcam.

• Create servo driven mount for high definition camera

with narrow field of view.

• Create servo driver with USB interface.
• Design simple communication protocol between servo

unit and embedded platform.

Department of Electrical Engineering 4.12. 2013

MATERIAL & METHOD

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• Eye position evaluation software was developed

directly on Pandaboard evaluation board (Cortex A9) in C++ using feature based object detector from OpenCV library.

• Prototype of servo driven camera mount was built

from two RC servos and building kit Merkur.

• Servo drive interface was based on Atmel

ATMEGA32U4 providing PWM signals controlling servos and USB interface to communicate with evaluation board.

• Communication protocol between servo drive and

evaluation board is using virtual COM port on USB and was implemented into both devices.

Department of Electrical Engineering 4.12. 2013

RESULTS

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• Presented system is very well reflecting expectations

and can be used as a part of accurate gaze tracker.

• Processing time of one frame is approx. 50ms which is

sufficient for this application but it can be improved using embedded platform with higher performance.

• Direction accuracy of camera is sufficient and can be

improved by distance measuring device.

Department of Electrical Engineering 4.12. 2013

ACKNOWLEDGEMENT & CONTACT

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Matěj Černý matej.cerny@student.upce.cz Department of Electrical Engineering

Faculty of Electrical Engineering and Informatics University of Pardubice Czech Republic http://www.upce.cz/en/fei/ke.html The research was supported by the specific research project of the IGA (SGFEI05/2013), University of Pardubice.