介绍了一个非穿戴式的低成本视线追踪系统。采用双近红外光源照射，单CCD相机获取信息的系统结构。并采用独特的双眼参数综合利用的方法来获取视线方向参数，使视线方向追踪效果更加稳定，并且同时扩大了有效追踪范围。此外，在视线方向参数获取、分析的过程中采用了一套快速算法使系统能满足实时性的要求。应用实例表明，该系统在人-机交互领域的应用已有了初步成效。

This paper presents a fast, low cost and non-contact gaze tracking system. The system is based on dual illuminators and a CCD camera. The camera captured the i mage of two eyes, and the synthesized information of both eyes was used to detec t the gaze direction. A fast pupil detection algorithm was proposed to speed up the image processing, and a simple model was used to recognize the gaze direction. Experimental results show that the system is applicable from -20° t o +20° angle of gaze in horizon and -16° to +16° angle of gaze in vertical. A human- computer interaction application proves that the system can estimate the user's gaze direction with tiny delay and relative high stability.

黄莹（1982－），女，北京市人，北京科技大学博士生，主要研究领域为智能信息处理、和谐人－机交互