1.2 Paper Organization
We first survey related work, introduce EOG, and describe
the main eye movement characteristics that we identify as
useful for EAR. We then detail and characterize the
recognition methodology: the methods used for removing
drift and noise from EOG signals, and the algorithms
developed for detecting saccades, fixations, blinks, and for
analyzing repetitive eye movement patterns. Based on
these eye movement characteristics, we develop 90 features;
some directly derived from a particular characteristic,
others devised to capture additional aspects of eye movement
dynamics.
We rank these features using minimum redundancy
maximum relevance (mRMR) feature selection and a
support vector machine (SVM) classifier. To evaluate both
algorithms on a real-world example, we devise an experiment
involving a continuous sequence of five office
activities, plus a period without any specific activity (the
NULL class). Finally, we discuss the findings gained from
this experiment and give an outlook to future work.