Estimating the Visual Direction with Two-Circle Algorithm

  • Haiyuan Wu
  • Qian Chen
  • Toshikazu Wada
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 3338)


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.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2004

Authors and Affiliations

  • Haiyuan Wu
    • 1
  • Qian Chen
    • 1
  • Toshikazu Wada
    • 1
  1. 1.Faculty of Systems EngineeringWakayama UniversityJapan

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