Influence of head orientation on perceived gaze direction and eye-region information
Influence of head orientation on perceived gaze direction and eye-region information
复制标题
头部方向对感知注视方向和眼区域信息的影响
DOI：
10.1167/18.12.15
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发表时间：
2018
影响因子：
1.8
通讯作者：
Colin W. G. Clifford
中科院分区：
文献类型：
--
作者：
Yumiko Otsuka;Colin W. G. Clifford
使用合成的3D头部和眼睛模型，我们研究了感知的注视方向和图像眼睛区域内的信息之间的关系，在头部方向的变化。对于每个刺激头部和眼睛的方向，我们呈现灰度图像与现实的色素沉着和阴影，和双色调图像描绘的区域对应的虹膜，瞳孔，或眼睛张开。使用灰度图像作为刺激的行为实验表明，感知的注视方向更强烈地偏向相反的头的方向（排斥效应），在远眼可见的条件比在近眼可见的条件。无论整个脸是否可见，这种趋势都会发生，这表明排斥效应是基于眼部区域信息产生的。与此一致，使用双色调图像的图像眼睛区域的几何分析显示，虹膜和瞳孔的相对位置的远眼移动相反的头部取向比近眼。此外，我们的研究结果关于头部方向的影响的模式表明，相对虹膜/瞳孔位置的估计可以实现通过一个过程的amodal完成整个虹膜背后的眼睑。模拟图像的额外几何分析揭示了可能观察到的对远眼的更大排斥效应的情况。
Using synthetic 3D head and eye models, we examined the relationship between perceived gaze direction and the information within the image eye region across changes in head orientation. For each stimulus head and eye orientation, we rendered gray-scale images with realistic pigmentation and shading, and two-tone images depicting the regions corresponding to the iris, pupil, or eye-opening. Behavioural experiments using the gray-scale images as stimuli showed that perceived gaze direction was more strongly biased opposite to head orientation (repulsive effect) in the far-eye visible condition than in the near-eye visible condition. This trend occurred regardless of whether or not the whole face was visible, suggesting that the repulsive effect arose based on eye-region information. Consistent with this, geometrical analysis of the image eye region using the two-tone images revealed that the relative position of the iris and pupil of the far eye shifted opposite to head orientation more than that of the near eye. In addition, our findings regarding the pattern of the influence of head orientation suggest that estimation of the relative iris/pupil position may be achieved through a process of amodal completion of the whole iris behind the eyelid. Additional geometrical analysis of simulated images revealed situations where a greater repulsive effect for the far eye, as found here, is likely to be observed.