Lanata Antonio, Greco Alberto, Valenza Gaetano, Scilingo Enzo Pasquale
Annu Int Conf IEEE Eng Med Biol Soc. 2015;2015:2283-6. doi: 10.1109/EMBC.2015.7318848.
This paper reports a novel stereo-vision-method (binocular system-geometrical mapped (BS-GM)) to estimate the depth coordinates of the eye gaze point in a controlled 3D space of vision. The method outcomes were compared in both 2D and 3D visual targets with both mono- and stereo-vision algorithms in order to estimate accuracy of results. More specifically, we compared BS-GM with a monocular method and with two stereo-vision methodologies which were different in order to the mapping functions. All of the methods were implemented in the same head mounted eye tracking system able to acquire both eyes. In 2D visual space (i.e. plane of vision) we compared BS-GM with a monocular method, a binocular system-linear mapped (BS-LM) and a binocular system-quadratic mapped (BS-QM). In the 3D space estimation all of the binocular systems were compared each other. Thirteen enrolled subjects observed 31 targets of known coordinates in a controlled environment. Results achieved on 2D comparison showed no statistical significant difference among the four methods, while the comparison on 3D space of vision showed that BS-GM method achieved a significant better accuracy than BS-LM and BS-QM method. Specifically, BS-GM showed and average percentage error obit of 3.47%.
本文报告了一种新颖的立体视觉方法（双目系统几何映射法，即BS - GM），用于在可控的3D视觉空间中估计眼睛注视点的深度坐标。为了评估结果的准确性，该方法的结果在2D和3D视觉目标中与单目和立体视觉算法进行了比较。更具体地说，我们将BS - GM与一种单目方法以及两种在映射函数方面不同的立体视觉方法进行了比较。所有方法都在同一个能够获取双眼信息的头戴式眼动追踪系统中实现。在2D视觉空间（即视觉平面）中，我们将BS - GM与一种单目方法、双目系统线性映射法（BS - LM）和双目系统二次映射法（BS - QM）进行了比较。在3D空间估计中，所有双目系统相互进行了比较。13名受试者在可控环境中观察了31个已知坐标的目标。2D比较的结果显示，这四种方法之间没有统计学上的显著差异，而在3D视觉空间的比较中表明，BS - GM方法比BS - LM和BS - QM方法具有显著更高的准确性。具体而言，BS - GM的平均轨道百分比误差为3.47%。
