Design specifications for a commercially viable electrooculography acquisition device for the disabled
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Date
2015
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University of New Brunswick
Abstract
In this thesis, several key aspects in the design of a commercially viable
electrooculography (EOG) acquisition device are discussed. The context for the needs of
such a device, along with associated background in the EOG signal and previous work
are presented.
The topic of electrooculography electrodes is introduced with a thorough
investigation into seven different types, all chosen for their relatively small size and
practicality. This investigation includes the impedance settling time, sweep response,
Warburg model parameters and motion artifact data for each electrode, providing an
objective overview.
EOG signal variability from subject to subject is explored with strong correlation
found. The majority of the face area is assessed for levels of electrooculography signals
present with all areas showing potentially useful levels. Finally, a novel pattern
recognition algorithm is used to assess the accuracy of EOG signal classification while
exploring the effect of the number of electrodes used and their positioning.