Estimating the visual direction with two-circle algorithm

Authors:
Haiyuan Wu;Qian Chen;Toshikazu Wada
Affiliations:
Faculty of Systems Engineering, Wakayama University, Japan;Faculty of Systems Engineering, Wakayama University, Japan;Faculty of Systems Engineering, Wakayama University, Japan
Venue:
SINOBIOMETRICS'04 Proceedings of the 5th Chinese conference on Advances in Biometric Person Authentication
Year:
2004

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Abstract

This paper describes a novel method to estimate visual direction from a single monocular image with “two-circle” algorithm We assume that the visual direction of both eyes is parallel and iris boundaries are circles in 3-D space Our “two-circle” algorithm can estimate the normal vector of the supporting plane of two iris boundaries, from which the direction of the visual direction can be calculated Most existing gaze estimation algorithms require eye corners and some heuristic knowledge about the structure of the eye as well as the iris contours In contrast to the exiting methods, ours does not use that additional information Another advantage of our algorithm is that it does not require the focal length, therefore, it is capable of estimating the visual direction from an image taken by an active camera The extensive experiments over simulated images and real images demonstrate the robustness and the effectiveness of our method.