Visual Direction Estimation from a Monocular Image

Haiyuan WU; Qian CHEN; Toshikazu WADA

doi:10.1093/ietisy/e88-d.10.2277

Visual Direction Estimation from a Monocular Image

Haiyuan WU, Qian CHEN, Toshikazu WADA

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This paper describes a sophisticated method to estimate visual direction using iris contours. This method requires only one monocular image taken by a camera with unknown focal length. In order to estimate the visual direction, we assume the visual directions of both eyes are parallel and iris boundaries are circles in 3D space. In this case, the two planes where the iris boundaries reside are also parallel. We estimate the normal vector of the two planes from the iris contours extracted from an input image by using an extended "two-circle" algorithm. Unlike most existing gaze estimation algorithms that require information about eye corners and heuristic knowledge about 3D structure of the eye in addition to the iris contours, our method uses two iris contours only. Another contribution of our method is the ability of estimating the focal length of the camera. It allows one to use a zoom lens to take images and the focal length can be adjusted at any time. The extensive experiments over simulated images and real images demonstrate the robustness and the effectiveness of our method.

Publication: IEICE TRANSACTIONS on Information Vol.E88-D No.10 pp.2277-2285

Publication Date: 2005/10/01

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DOI: 10.1093/ietisy/e88-d.10.2277

Type of Manuscript: Special Section PAPER (Special Section on Image Recognition and Understanding)

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Haiyuan WU, Qian CHEN, Toshikazu WADA, "Visual Direction Estimation from a Monocular Image" in IEICE TRANSACTIONS on Information, vol. E88-D, no. 10, pp. 2277-2285, October 2005, doi: 10.1093/ietisy/e88-d.10.2277.
Abstract: This paper describes a sophisticated method to estimate visual direction using iris contours. This method requires only one monocular image taken by a camera with unknown focal length. In order to estimate the visual direction, we assume the visual directions of both eyes are parallel and iris boundaries are circles in 3D space. In this case, the two planes where the iris boundaries reside are also parallel. We estimate the normal vector of the two planes from the iris contours extracted from an input image by using an extended "two-circle" algorithm. Unlike most existing gaze estimation algorithms that require information about eye corners and heuristic knowledge about 3D structure of the eye in addition to the iris contours, our method uses two iris contours only. Another contribution of our method is the ability of estimating the focal length of the camera. It allows one to use a zoom lens to take images and the focal length can be adjusted at any time. The extensive experiments over simulated images and real images demonstrate the robustness and the effectiveness of our method.
URL: https://globals.ieice.org/en_transactions/information/10.1093/ietisy/e88-d.10.2277/_p

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@ARTICLE{e88-d_10_2277,
author={Haiyuan WU, Qian CHEN, Toshikazu WADA, },
journal={IEICE TRANSACTIONS on Information},
title={Visual Direction Estimation from a Monocular Image},
year={2005},
volume={E88-D},
number={10},
pages={2277-2285},
abstract={This paper describes a sophisticated method to estimate visual direction using iris contours. This method requires only one monocular image taken by a camera with unknown focal length. In order to estimate the visual direction, we assume the visual directions of both eyes are parallel and iris boundaries are circles in 3D space. In this case, the two planes where the iris boundaries reside are also parallel. We estimate the normal vector of the two planes from the iris contours extracted from an input image by using an extended "two-circle" algorithm. Unlike most existing gaze estimation algorithms that require information about eye corners and heuristic knowledge about 3D structure of the eye in addition to the iris contours, our method uses two iris contours only. Another contribution of our method is the ability of estimating the focal length of the camera. It allows one to use a zoom lens to take images and the focal length can be adjusted at any time. The extensive experiments over simulated images and real images demonstrate the robustness and the effectiveness of our method.},
keywords={},
doi={10.1093/ietisy/e88-d.10.2277},
ISSN={},
month={October},}

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TY - JOUR
TI - Visual Direction Estimation from a Monocular Image
T2 - IEICE TRANSACTIONS on Information
SP - 2277
EP - 2285
AU - Haiyuan WU
AU - Qian CHEN
AU - Toshikazu WADA
PY - 2005
DO - 10.1093/ietisy/e88-d.10.2277
JO - IEICE TRANSACTIONS on Information
SN -
VL - E88-D
IS - 10
JA - IEICE TRANSACTIONS on Information
Y1 - October 2005
AB - This paper describes a sophisticated method to estimate visual direction using iris contours. This method requires only one monocular image taken by a camera with unknown focal length. In order to estimate the visual direction, we assume the visual directions of both eyes are parallel and iris boundaries are circles in 3D space. In this case, the two planes where the iris boundaries reside are also parallel. We estimate the normal vector of the two planes from the iris contours extracted from an input image by using an extended "two-circle" algorithm. Unlike most existing gaze estimation algorithms that require information about eye corners and heuristic knowledge about 3D structure of the eye in addition to the iris contours, our method uses two iris contours only. Another contribution of our method is the ability of estimating the focal length of the camera. It allows one to use a zoom lens to take images and the focal length can be adjusted at any time. The extensive experiments over simulated images and real images demonstrate the robustness and the effectiveness of our method.
ER -