Gaze estimation in a gaze tracking system

• Published in: Science China. Information sciences Vol. 54; no. 11; pp. 2295 - 2306
• Main Authors: Zhang, Chuang, Chi, JianNan, Zhang, ZhaoHui, Gao, XiaoLiang, Hu, Tao, Wang, ZhiLiang
• Format: Journal Article
• Language: English
• Published: Heidelberg SP Science China Press 01.11.2011; Springer Nature B.V
• Subjects: Calibration; Cameras; Compensation; Complex systems; Computer Science; Cornea; CR系统; Eye movements; Glint; Head movement; Information Systems and Communication Service; Light sources; Mathematical analysis; Motion effects; Pupils; Research Papers; System effectiveness; Tracking systems; User requirements; 个体差异; 人机交互系统; 估计方法; 头部运动; 补偿模型; 视线; 跟踪系统; gaze tracking; gaze estimation; pupil center cornea reflection (PCCR); head compensation; individual calibration
• ISSN: 1674-733X; 1869-1919
• DOI: 10.1007/s11432-011-4243-6

This article presents a gaze estimation method （GEMHSSO） based on the pupil center cornea reflection （PCCR） technique. Existing PCCR systems suffer from several problems, including the restriction of users＇ head movement, and the requirement of individual calibration. This paper presents a head position compensation model using a single camera and a single light source, which realizes the analytic compensation of head motion effects on pupil-glint vectors. We then present a transformation model for individual differences to simplify the calibration process to a one-point calibration. On this basis, we establish a novel gaze estimation method that reduces the minimum hardware requirements for accurate estimation to a single camera （not calibrated） and a single light source. Without the need for a complex system, our method has the ability to estimate gaze during natural head movement, and to substantially simplify user calibration. Each step of the proposed method in this paper makes real-time implementation possible, which provides an effective solution for eye-gaze tracking in human-computer interaction systems.