Direct Gaze Estimation Based on Nonlinearity of EOG

Electrooculography (EOG) is one of the measures used to estimate the direction of a person's gaze; however, conventional EOG techniques suffer from a drift issue which makes it difficult to extract an accurate absolute eye angle. The technique proposed here is based on the nonlinearity of the E...

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Bibliographic Details
Published in:IEEE transactions on biomedical engineering 2015-06, Vol.62 (6), p.1553-1562
Main Authors: Manabe, Hiroyuki, Fukumoto, Masaaki, Yagi, Tohru
Format: Article
Language:English
Subjects:
Calibration
Electrodes
Electrooculography
Electrooculography - methods
EOG
Equations
Estimation
Fixation, Ocular - physiology
Gaze estimation
Humans
Male
Mathematical model
non-linearity
saccade
Saccades
Signal Processing, Computer-Assisted
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Summary:Electrooculography (EOG) is one of the measures used to estimate the direction of a person's gaze; however, conventional EOG techniques suffer from a drift issue which makes it difficult to extract an accurate absolute eye angle. The technique proposed here is based on the nonlinearity of the EOG and offers a practical solution to this problem. It estimates the absolute eye angles before and after a saccade, which cancels the offset due to the drift. Additionally, it does not require any effort from the user or any target, but instead uses only the difference of the EOGs. Experiments with five subjects confirm that the proposed technique can estimate the absolute eye angle with an error of less than 4^\circ. They also show improvements are achieved with several options such as weighting and multiple saccades. The technique will contribute to practical EOG-based interaction systems.
ISSN:0018-9294
1558-2531
DOI:10.1109/TBME.2015.2394409