基于视线水平偏移特征的眼动向量计算方法  

Calculation Method of Eye Vectors Based on Line-of-Sight Horizontal Offset Feature

作　　者：田会娟[1,2] 王思琦 Tian Huijuan;Wang Siqi(Tianjin Key Laboratory of Optoelectronic Detection and System,School of Electrical and Electronic Engineering,Tiangong University,Tianjin,300387,China;Engineering Research Center of Ministry of Education on High Power Solid State Lighting Application System,Tiangong University,Tianjin,300387,China)

机构地区：[1]天津工业大学电气与电子工程学院天津市光电检测技术与系统重点实验室,天津300387 [2]天津工业大学大功率半导体照明应用系统教育部工程研究中心,天津300387

出　　处：《激光与光电子学进展》2021年第23期386-394,共9页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(61504095);天津市科技计划项目(18ZXCLGX00090)。

摘　　要：视线追踪是一种人机交互技术,在学术界和工业界倍受关注。针对基于多项式回归的非侵入式系统注视点的精度平均误差较大的问题,提出一种基于视线水平偏移特征的眼动向量计算方法。该方法在准确提取人脸图像上虹膜中心和内眼角坐标的基础上,以内眼角坐标为基准点计算虹膜中心相对于内眼角坐标的偏移量,再通过偏移量计算水平眼动向量的权值,然后利用权值对左右眼的水平眼动向量分别加权合成新的水平眼动向量。采用哥伦比亚注视数据集的20名受试人员头部水平角度为0°的数据,在4个回归模型上对该方法进行实验验证。结果表明,与双眼平均眼动向量计算方法相比,该方法能进一步减小注视点水平视角误差、提升系统精度。Gaze tracking is a human-computer interaction technology,which has received extensive attention in academia and industry.Aiming at the problem of the large average error of the gaze points accuracy in non-invasive systems based on polynomial regression,a method of eye vectors calculation based on line-of-sight horizontal offset feature is proposed.On the basis of accurately extracting the coordinates of the iris center and inner corner of the eye on the face image,this method uses the inner corner coordinates as the reference point to calculate the offset of the iris center relative to the inner corner coordinates,calculates the weight of the horizontal eye movement vector through the offset,and then uses the weight to weight the horizontal eye movement vectors of the left and right eyes to synthesize new horizontal eye movement vectors.Using the data of 20 subjects with the head horizontal angle 0°from the Columbia Gaze database,this method was experimentally verified on 4 regression models.The results show that compared with the calculation method of binocular average eye vectors,this method can further reduce the horizontal of viewing angle error of the gaze points and improve the system accuracy.

关 键 词：视觉光学 眼动向量 视线追踪 多项式回归 虹膜中心 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]