Cue integration outside central fixation: a study of grasping in depth.
Cue integration outside central fixation: a study of grasping in depth.
复制标题
中央注视之外的提示整合：深度把握的研究。
DOI：
10.1167/9.2.11
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发表时间：
2009
影响因子：
1.8
通讯作者：
Knill,DavidC
中科院分区：
文献类型：
--
作者：
Greenwald,HalS;Knill,DavidC
我们通过量化视网膜偏心和距视轴的距离如何影响人类对单眼和双眼线索的相对依赖来评估立体视觉在整个视野中的有效性。单、双眼信息的信度随偏心率的增加而下降，但双眼信息的信度下降更快。双眼线索的可靠性也随着距直升机距离的增加而下降，而单眼线索的可靠性几乎不受影响。我们测量了实验对象在不同的离心率和距离上抓取定向圆盘时如何整合这些线索来定位他们的手。受试者对双眼视差的依赖程度随着目标的视网膜偏心率和距离的增加而降低。测量到的线索影响与从不同目标位置的相对线索信度预测的结果一致。我们的研究结果表明，相对可靠性影响信号对运动控制的影响，而立体视觉在外围和远离视轴的区域的作用有限，因为单眼信号在这些区域更可靠。
We assessed the usefulness of stereopsis across the visual field by quantifying how retinal eccentricity and distance from the horopter affect humans' relative dependence on monocular and binocular cues about 3D orientation. The reliabilities of monocular and binocular cues both decline with eccentricity, but the reliability of binocular information decreases more rapidly. Binocular cue reliability also declines with increasing distance from the horopter, whereas the reliability of monocular cues is virtually unaffected. We measured how subjects integrated these cues to orient their hands when grasping oriented discs at different eccentricities and distances from the horopter. Subjects relied increasingly less on binocular disparity as targets' retinal eccentricity and distance from the horopter increased. The measured cue influences were consistent with what would be predicted from the relative cue reliabilities at the various target locations. Our results showed that relative reliability affects how cues influence motor control and that stereopsis is of limited use in the periphery and away from the horopter because monocular cues are more reliable in these regions.