Computing three-dimensional eye position quaternions and eye velocity from search coil signals

Computing three-dimensional eye position quaternions and eye velocity from search coil signals
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根据搜索线圈信号计算三维眼睛位置四元数和眼睛速度

DOI:
10.1016/0042-6989(90)90130-d
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发表时间:
1990
期刊:
影响因子:
1.8
通讯作者:
T. Vilis
T. Vilis
中科院分区:
心理学3区
文献类型:
--
作者:
D. Tweed;W. Cadera;T. Vilis

文献摘要

被引文献

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四元数(英语:Quaternion)是一种四分量旋转运算符,它用眼睛的轴和角度来表示眼睛的旋转,相对于其他眼睛位置的表示(如Fick坐标)有几个优点:它们提供了简单的计算,对称性,Listing定律的简单形式,以及有用的眼睛运动的三维图。在本文中,我们提出的算法计算眼睛的位置四元数和眼睛的角速度(而不是在三维中的位置的导数)从两个搜索线圈(不一定正交)在一只眼睛在两个或三个磁场,并使用四元数定位的主要位置。我们展示了如何分化的眼睛位置信号产生差估计的所有三个组成部分的眼睛速度。
The four-component rotational operators called quaternions, which represent eye rotations in terms of their axes and angles, have several advantages over other representations of eye position (such as Fick coordinates): they provide easy computations, symmetry, a simple form for Listing's law, and useful three-dimensional plots of eye movements. In this paper we present algorithms for computing eye position quaternions and eye angular velocity (not the derivative of position in three dimensions) from two search coils (not necessarily orthogonal) on one eye in two or three magnetic fields, and for locating primary position using quaternions. We show how differentiation of eye position signals yields poor estimates of all three components of eye velocity.