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

Eye Tracking System on Embedded Platform Matěj Černý Department of Electrical Engineering 4.12. 2013

INTRODUCTION 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 1

OBJECTIVES 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 2

MATERIAL & METHOD 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 3

RESULTS 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 4

ACKNOWLEDGEMENT & CONTACT 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. Department of Electrical Engineering 4.12. 2013 5