基于角膜反射法的视线追踪系统的视线落点校正研究  

Research on Correction of Fixation Point of Corneal-reflection-based Eye Tracking System

作　　者：胡锴 穆平安[1] 黄世龙 HU Kai;MU Ping-an;HUANG Shi-long(School of Optical-Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093

出　　处：《计量学报》2022年第3期331-337,共7页Acta Metrologica Sinica

基　　金：2021年学位点引导布局与建设培训项目(XWDB2021105)。

摘　　要：为了提高视线追踪系统的精度,将屏幕均分为6行8列共48个区域,在每个区域的中央设立校准点,测试者依次注视每个校准点,从而计算出48个校准点处的误差,将误差分解为X轴和Y轴两向误差,并把两向误差作为校正值分别进行曲面插值,从而获得整个屏幕内任意位置的X向和Y向校正值,使用校正值对视线落点的坐标进行校正。相对于目前较好的校正方法,采用该方法校正后X向误差降低了35.8%,Y向误差降低了53.3%;该视线落点校正方法的校正效果明显提升,可以有效地提高视线落点预测的精度。In order to improve the accuracy of the system.The screen is divided into 6 rows and 8 columns,a total of 48 areas.Calibration points are set in the center of each area,and the tester looks at each calibration point in turn to calculate the 48 errors.The errors are decomposed into X-axis and Y-axis errors,and then the X-axis and Y-axis errors are used as calibration values and are interpolated to obtain the X-axis and Y-axis calibration values for any position within the entire screen.At last,X-axis and Y-axis calibration values are used to correct the X-axis and Y-axis coordinates of fixation point.Compared with the current better calibration method,the X-axis error is reduced by 35.8%,and the Y-axis error is reduced by 53.3%.The correction effect of this correction method is significantly improved,which can effectively improve the accuracy of eye tracking.

关 键 词：计量学 视线追踪 交比不变性 瞳孔中心检测 径向基插值 

分 类 号：TB96[机械工程—光学工程]