Development of 3-D eye Position Registration System

长期以来，人们一直在尝试用单眼而非双眼来记录眼睛的位置，这主要是因为：(1)双眼眼球共轭运动的特点；(2)同时记录两只眼睛的技术困难。然而，眼球运动存在一个非共轭特征，即收敛性，它不能满足双眼眼球运动的完整位置信息。在这项资助下进行的研究和开发的重点是如何在以前的单眼记录技术的基础上注册3d眼睛位置。此外，该研究的隐含目的是回顾目前流行的眼睛注册方法，并在当代高科技设施的帮助下开发更准确的方法。利用传统的眼位配准方法眼电仪对系统数据进行评价。本文的主要研究工作是：1)开发高性能计算机辅助的三维眼动自动追踪系统；2)开发双目同步记录系统；3)实现高达500Hz采样时间的高速率数据采集，实现眼动的准确配准；4)确定数据归一化的自动标定方法。结果表明，采用特殊的角膜边缘反射法，可以实现双眼同时高速率的位置配准。

It has been trying to registrate eye position not binocurally but monocurally for long time, because of 1) characteristics of conjugate binocular eye movements, and 2) the difficulty of techniques for simultaneous recording of two eyes. However there is a characteristics of nonconjugate eye movements, that is vergence, which does not satisfy the full position information on eye movements for both eyes. The study and development done under the grant focused on how to registrate 3-D eye position based on previous one eye recording technique. Further more the study has implicit purposes to review eye registration methods which is now popular and to develop more accurate way which might be aided by contemporary high tech. Facilities. The data obtained by newly developed system was evaluated by traditional eye position registration method, electrooculograph. Main research activity done here was 1) to develop 3-D automatic eye tracking systems aided by high performance computer, 2) to develop binocular simultaneous recording system, 3) to perform high rate data acquisition up to 500Hz sampling time which make accurate registration of saccades, 4) to fix the automatic calibration methods which normalize the data linialization. The results show quite satisfactory developed facilities which enables to registrate simultaneous both eye high rate position registration with using speeial limbus-corneal reflection method.