Imaging Components, Systems, and Processing

Remote eye-gaze tracking method robust to the device rotation

[+] Author Affiliations
Sung-Tae Kim, Kang-A Choi, Yong-Goo Shin, Mun-Cheon Kang, Sung-Jea Ko

Korea University, Department of Electronic Engineering, Anam-dong 5-ga, Sungbuk-gu, Seoul 136-713, Republic of Korea

Opt. Eng. 55(8), 083108 (Aug 23, 2016). doi:10.1117/1.OE.55.8.083108
History: Received April 20, 2016; Accepted August 2, 2016
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Abstract.  A remote eye-gaze tracking (REGT) method is presented, which compensates for the error caused by device rotation. The proposed method is based on the state-of-the-art homography normalization (HN) method. Conventional REGT methods, including the HN method, suffer from a large estimation error in the presence of device rotation. However, little effort has been made to clarify the relation between the device rotation and its subsequent error. This paper introduces two factors inducing device rotation error, the discrepancy between the optical and visual axis, called angle kappa, and the change in camera location. On the basis of these factors, an efficient method for compensating for the REGT error is proposed. While the device undergoes a 360-deg rotation, a series of erroneous points of gaze (POGs) are obtained on the screen and modeled as an ellipse, and then the center of the ellipse is exploited to estimate the rotation-invariant POG. Experimental results demonstrate that the proposed REGT method can estimate the POG accurately in spite of the rotational movement of the device.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Topics

Calibration ; Cameras ; Eye

Citation

Sung-Tae Kim ; Kang-A Choi ; Yong-Goo Shin ; Mun-Cheon Kang and Sung-Jea Ko
"Remote eye-gaze tracking method robust to the device rotation", Opt. Eng. 55(8), 083108 (Aug 23, 2016). ; http://dx.doi.org/10.1117/1.OE.55.8.083108


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