Eye Motion Interpretation and Artificial Eye Control
Date Issued
2010
Date
2010
Author(s)
Chen, Yi-Zhu
Abstract
Research in eye tracking technique has been developed for many years. Besides being continuously used in scientific experiments, such as discussing the tendency of human eye for visual stimulation or psychology state revealed from eye gaze direction, it’s application aspects are also being actively developed. Some of its applications include: alternative input devices in human-computer interface or recording of the eye’s gazed object. There are many commercially available developed eye tracking devices for scientific experiments or other applications. However, most of the eye tracking devices have the same defects: complicated calibration procedures and the accuracy is easily affected by head motion. Therefore, it hasn’t been widely used up to now.
In this thesis, we have designed and developed an eye tracking system consisting of cameras that follow the eye’s movement and focus on the same target. It is expected to be applied in an artificial eye system controlled by a real eye. The system uses servo motors as actuators, microcontrollers as controllers and a camera to capture the eye’s image. After this image is processed, the two cameras, each represents the real human eye and the artificial eye, are able to focus on a specific point, the same as the human eye’s gazing point. With some geometrical operations, the object’s distance and direction away from human eye is also obtained. As shown in experimental results, the camera representing the artificial eye can be successfully turned to the eye’s gazed object according to the captured eye image and the estimated object’s distance has an error of about 10%.
Subjects
eye tracking
artificial eye
object recognition
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