TITLE:
Calculate Target Position of Object in 3-Dimensional Area Based on the Perceived Locations Using EOG Signals
AUTHORS:
Muhammad Ilhamdi Rusydi, Minoru Sasaki, Satoshi Ito
KEYWORDS:
Gaze Motion, Blink, Affine Transform, Perceived Location, Camera
JOURNAL NAME:
Journal of Computer and Communications,
Vol.2 No.11,
September
12,
2014
ABSTRACT: EOG is a biosignal which occurs during eye
activities such as eye movement and blink. EOG has a linear relationship with
gaze distance. Detection object position in 3-dimensional area using gaze
motion was proposed in this research. To calculate the distance of gaze motion
in pixel unit, affine transform method was developed. The homogeneous matrix
from five geometry processes: transformation-1, rotation, transformation-2,
shear, and dilatation was determined. To give tracking ability in 3-dimensional
area, two cameras were attached each in front of and top side of object. The cameras
were accessed by voluntary blink. The EOG characteristic of blink eye was determined
based on the absolute ratio between positive peak and negative peak which was
greater than 1. Every blink toggled the active camera. The position of object
was given by the perceived locations from the two cameras. Every movement in
pixel coordinate was converted into centimeter unit. Then, the perceived
location was used to calculate to the base coordinate. The result shows that
the blink method successfully accessed the camera. Both of the cameras could
show the location of object from their side. Calculating the gaze distance
using affine transform also gave a satisfied result. Using this method controlling
a machine in 3-dimensional area by EOG could be developed.