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added short experimental description to eye-tracker project and fixed some errors

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sonnenberg 2021-02-01 19:34:27 +01:00
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projects/project_eyetracker/eyetracker.tex
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@ -15,8 +15,8 @@ subjects were viewing biblical images while their eye movements were
recorded.
In the accompanying datasets you find a subject's eye tracking data when viewing two different images
(\emph{Genesis\_VIII.png} and \emph{Genesis\_XXXIX.png}, files \verb+1_1.mat+ and \verb+1_2.mat+, respectively). The experiment consisted of different
Each \verb+mat+-file contains five variables: \verb+frame_index+, the \verb+gaze_x+ and \verb+gaze_y+ position (in pixel on the screen), a boolean vector \verb+eye_found+ telling whether the tracker could actually estimate the eye position, and a vector \verb+marker+. The \verb+marker+ is used to indicate sections in the data. 0 can be ignored, 1 marks the fixation period and 2 indicates the acutal trial.
(\emph{Genesis\_VIII.png} and \emph{Genesis\_XXXIX.png}, files \verb+1_1.mat+ and \verb+1_2.mat+, respectively). The experiment consisted of different trials. Each trial started with a fixation period, followed by the important free eye-movement part.
Each \verb+mat+-file contains five variables: \verb+frame_index+, the \verb+gaze_x+ and \verb+gaze_y+ position (in pixel on the screen), a boolean vector \verb+eye_found+ telling whether the tracker could actually estimate the eye position, and a vector \verb+marker+. The \verb+marker+ is used to indicate sections in the data. 0 can be ignored, 1 marks the fixation period and 2 indicates the actual trial.
The screen was 37.6\,cm wide and 30.1\,cm high and had a resolution of 1280\,x\,1024\,pixel. The distance between subject's eyes and the screen was 50\,cm.
The eyetracker recorded ey positions with 60\,Hz. The fixation point was shown at the center of the screen and can be used to compensate for possible offests in the \verb+gaze_x+ and \verb+gaze_y+ positions.
@ -31,7 +31,7 @@ The eyetracker recorded ey positions with 60\,Hz. The fixation point was shown a
\question Characterize the eye movements statistically.
\begin{parts}
\part Calculate with eye speed and/or accelerations.
\part Calculate the eye speed and/or accelerations.
\part Create a 'heatmap' plot of the eye-positions.