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Long-Range Gaze Tracking System for Large Movements

Title
Long-Range Gaze Tracking System for Large Movements
Author
김회율
Keywords
Gaze tracking; infrared; long range; natural movement
Issue Date
2013-12
Publisher
IEEE INSTITUTE OF ELECTRICAL AND ELECTRONICS
Citation
IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING, Vol.60, No.12 [2013], p3432-3440
Abstract
In the vision-based remote gaze tracking systems, the most challenging topics are to allow natural movement of a user and to increase the working volume and distance of the system. Several eye gaze estimation methods considering the natural movement of a user have been proposed. However, their working volume and distance are narrow and close. In this paper, we propose a novel 2-D mapping-based gaze estimation method that allows large-movement of user. Conventional 2-D mapping-based methods utilize mapping function between calibration points on the screen and pupil center corneal reflection (PCCR) vectors obtained in user calibration step. However, PCCR vectors and their associated mapping function are only valid at or near to the position where the user calibration is performed. The proposed movement mapping function, complementing the user's movement, estimates scale factors between two PCCR vector sets: one obtained at the user calibration position and another obtained at the new user position. The proposed system targets a longer range gaze tracking which operates from 1.4 to 3 m. A narrow-view camera mounted on a pan and tilt unit is used by the proposed system to capture high-resolution eye image, providing a wide and long working volume of about 100 cm x 40 cm x 100 cm. The experimental results show that the proposed method successfully compensated the poor performance due to user's large movement. Average angular error was 0.8 degrees and only 0.07 degrees of angular error was increased while the user moved around 81 cm.
URI
http://ieeexplore.ieee.org/document/6525350/http://hdl.handle.net/20.500.11754/45989
ISSN
0018-9294
DOI
10.1109/TBME.2013.2266413
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRONIC ENGINEERING(융합전자공학부) > Articles
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