基于角膜反射的非侵入式视线跟踪技术

针对现有的视线跟踪技术设备复杂、对姿势限制过多、要头部佩戴专用设备等方面的不足，提出一种实现视线跟踪技术的新方法，采用5个近红外光灯作为角膜反射的光源。该方法不需要带任何头戴设备，并且能适应头部的自然运动，设计的算法计算出来的视线位置精度较高。提出一种新的瞳孔边缘拟合方案，循环拟合剔除假点，最终得到精确的瞳孔中心，提高了映射的精度。利用图像的灰度进行人眼的初定位，快速而准确。利用交比不变原理进行坐标映射，精确计算出注视坐标。

Non-invasive eye tracking technology based on corneal reflex

For the deficiencies that existing eye tracking devices are complex,have too many restrictions on the position,need to wear special equipment.A novel method of eye tracking technology using the five near-infrared light as the source of corneal reflex was put forward.This method did not need any wearing equipment,and could adapt to the natural head movement,the algorithm designed calculates the position of sight in high accuracy.A novel method of pupil edge fitting was put forward:fitted circularly and removed false points to get accurate position of pupil center,improved mapping accuracy.Used the GrayScale of image to initialize eye position quickly and accurately.Using the theory of cross-ratio invariance to make coordinate mapping,finally calculated the attention coordinate accurately.