一种基于交比不变性的视线补偿方法  

An improved line-of-sight estimation method based on intersection invariance

作　　者：孙家伟 林子镇 刘毅航 范良志 SUN Jia-wei;LIN Zi-zhen;LIU Yi-hang;FAN Liang-zhi(School of Mechanical Engineering and Automation,Wuhan Textile University,Wuhan Hubei 430200,China)

机构地区：[1]武汉纺织大学机械工程与自动化学院,湖北武汉430200

出　　处：《武汉纺织大学学报》2023年第4期52-58,共7页Journal of Wuhan Textile University

基　　金：教育部人文社会科学研究规划基金项目(19YJAZH014)。

摘　　要：由于交比不变模型在计算视线时存在将角膜面理想化以及未区分光轴和视轴的问题,导致计算的视线落点误差较大,为此提出一种构建虚拟平面并通过注视轨迹校准的方法来计算视线落点。该方法根据人眼生理特征建立虚拟平面,并使用一种新的校准方法进行校准,使用最小二乘法对校准点进行拟合,改善了多点校准方法过程复杂性和体验差的问题。通过对不同处理条件下的视线落点偏差进行比较,说明该方法可在保证视线计算精度的前提下简化校准过程。Due to the problem of idealizing the corneal surface and not distinguishing between the optical axis and the visual axis in t he calculation of the line of sight of the cross-ratio invariant model,the calculated line-of-sight landing point error is large.This paper proposes a method to construct a virtual plane and calculate the line-of-sight point by calibrating it by gaze trajectory.This method establishes a virtual plane according to the physiological characteristics of the human eye,and uses a new calibration metho d for calibration,and uses the least squares method to fit the calibration points,which improves the complexity of the multi-point calibration method and the poor calibration experience.By comparing the deviation of the line of sight under different treatment conditi ons,it is shown that this method can simplify the user's calibration process under the premise of ensuring the accu racy of line of sight calculation.

关 键 词：视线落点 交比不变性 最小二乘法 校准 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]