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计算机工程 ›› 2007, Vol. 33 ›› Issue (18): 199-201,. doi: 10.3969/j.issn.1000-3428.2007.18.070

• 人工智能及识别技术 • 上一篇    下一篇

视线跟踪系统中的眼角点精确定位方法

高 飞,张宪民   

  1. (上海交通大学模式识别与图像处理研究所,上海 200240)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2007-09-20 发布日期:2007-09-20

Precise Eye-corner Locating in Eye-gaze Tracking System

GAO Fei, ZHANG Xian-min   

  1. (Pattern Recognition & Image Processing Institute, Shanghai Jiaotong University, Shanghai 200240)
  • Received:1900-01-01 Revised:1900-01-01 Online:2007-09-20 Published:2007-09-20

摘要: 在视线跟踪系统中,提出了一种以眼角点为参考点来计算人眼注视方向和位置的新方法。该方法中以动点和参考点的差值来计算人眼的注视方向和位置。动点采用虹膜中心,因为它可以准确反映眼球的变化。参考点采用眼角点,因为眼角点在人脸上是个非常稳定的点,人脸表情的变化基本上不会引起它的位置变化。该方法克服了过去以mark点或普尔钦斑点为参考点的缺点,不需要使用者在脸上做mark点,而且允许人脸在小范围内偏转。实验证明,该方法中自动定位眼角点快速准确,可以很好地解决视线跟踪系统中眼睛相对运动距离的问题。

关键词: 红外电视法, 人机交互, 视线跟踪, 眼角点定位

Abstract: This paper proposes a novel method for computing the eye-gaze direction and position in the eye-gaze tracking system. The eye corner is applied as the reference point instead of mark and Purkinje points in traditional ones. The difference of the moving point and the reference one is employed to compute the eye-gaze direction and position in the presented method. The center of iris is explored as the moving point due to that it can accurately reflect the moving state of eye. The eye corner is exploited as the reference point due to that it is the most stable point and relatively insensitive to facial expressions. The proposed method overcomes the shortcomings of conventional ones that adopt the mark and Purkinje as the reference points, and it does not need users to mark the marks on faces and allow the moderate variations of hear pose. Experimental results indicate that the method of the eye corner locating is fast and precise. In this way, the relative distance problem of eye motion arising in the eye-gaze tracking system can be well handled.

Key words: infrared TV method, human-computer interaction, eye-gaze tracking, eye corner locating

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