Abstract 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.
HU Kai,MU Ping-an,HUANG Shi-long. Research on Correction of Fixation Point of Corneal-reflection-based Eye Tracking System[J]. Acta Metrologica Sinica, 2022, 43(3): 331-337.
［1］Laddi A, Prakash N R. Eye gaze tracking based directional control interface for interactive applications［J］. Multimedia Tools and Applications, 2019, 78(22): 31215-31230.
［2］Santis A D, Iacoviello D. Robust real time eye tracking for computer interface for disabled people［J］. Computer Methods and Programs in Biomedicine, 2009, 96(1): 1-11.
［3］Sunmyung P. A study on the characteristics of consumer visual-perceptional information acquisition in commercial facilities in regard to its construction of space from real-time eye gaze tracking［J］. Science of Emotion and Sensibility, 2018, 21(2): 3-14.
［4］Lee D, Yoon H, Hong H, et al. Fuzzy-system-based detection of pupil center and corneal specular reflection for a driver-gaze tracking system based on the symmetrical characteristics of face and facial feature points［J］. Symmetry, 2017, 9(11): 267-298.
［5］Xue N, Cai S W, Chen Y Y, et al. Gaze-tracking algorithm based on infrared gray image［J］. International Journal of Performability Engineering, 2019, 15(11): 2891-2898.
［6］Lu S F, Li R C, Jiao J N, et al. An eye gaze tracking method of virtual reality headset using a single camera and multi-light source［J］. Journal of Statistical Mechanics: Theory and Experiment, 2020, 1518(1): 12020-12029.
［7］Pamungkas D S, Erico A, Handri T. Controlling robot eyes using pupil detection［J］. Advanced Science Letters, 2018, 24(12): 9563-9566.
［8］Jang K S. Pupil detection using PCA and hough transform［J］. Journal of the Korea Society of Computer and Information, 2017, 22(2): 21-27.
［9］Martinikorena I, Cabeza R, Villanueva A, et al. Fast and robust ellipse detection algorithm for head-mounted eye tracking systems［J］. Journal of Computational and Theoretical Nanoscience, 2018,29(5): 845-860.
［10］梅向明,刘增贤,王汇淳,等. 高等几何［M］. 北京: 高等教育出版社,2008: 44-56.
［11］Yoshinobu E, Kiyotaka F. Head-free, remote eye-gaze detection system based on pupil-corneal reflection method with easy calibration using two stereo-calibrated video cameras［J］. IEEE Transactions on Biomedical Engineering, 2013, 60(10): 2952-60.
［12］张吉焱,刘文丽,高明亮,等. 人眼角膜参数计量校准与量值溯源方法研究［J］. 计量学报,2020, 41(11): 1339-1343.
Zhang J Y, Liu W L, Gao M L, et al. Calibration and Traceability Method for Human Cornea Parameters［J］. Acta Metrologica Sinica, 2020, 41(11): 1339-1343.
［13］Mestre C, Gautier J, Pujol J. Robust eye tracking based on multiple corneal reflections for clinical applications［J］. Journal of biomedical optics, 2018, 23(3):1-9.
［14］李抵非,陈赫,冯志刚,等. 一种双目立体视觉系统的校准方法［J］. 计量学报,2018, 39(4): 485-489.
Li D F, Chen H, Feng Z G, et al. A Calibration Method of Binocular Vision System［J］. Acta Metrologica Sinica, 2018, 39(4): 485-489.
［15］Coutinho F L, Morimoto C H. Improving head movement tolerance of cross-ratio based eye trackers［J］. International Journal of Computer Vision, 2013, 101(3): 459-481.
［16］兰善伟. 基于瞳孔角膜反射视线追踪技术的研究［D］. 哈尔滨: 哈尔滨工业大学, 2014: 31-33.
［17］Esmaeilbeigi M, Garmanjani G. Gaussian radial basis function interpolant for the different data sites and basis centers［J］. Calcolo, 2017, 54(1): 155-166.
2022, Vol. 43 
