Do observers use their own interpupillary distance in disparity scaling?
Do observers use their own interpupillary distance in disparity scaling?
复制标题
DOI：
10.1007/s10043-022-00780-x
复制
发表时间：
2023-01-11
期刊：
影响因子：
1.2
通讯作者：
Taya，Shuichiro
中科院分区：
文献类型：
--
作者：
Taya，Shuichiro
本研究探讨了个体间瞳孔间距的差异是否会导致双眼立体视觉深度知觉的个体差异。视网膜水平视差（HRD）是最有效的深度线索之一，但视觉系统不能单独从HRD唯一地估计度量深度。这是因为HRD的大小不仅作为外部深度的大小的函数，而且作为观看距离和IPD的函数来确定。因此，为了从HRD真实地感知深度，观察者需要调整缩放增益（即，将HRD转换为感知深度时的放大因子），同时考虑他们的IPD。为了研究视觉系统是否执行这样的增益校准，我们研究了IPD的大小和感知深度之间的关系时，观察立体图（即固定HRD的视觉刺激）在一个固定的观看距离与54名观察员。结果表明，知觉深度与IPD之间存在显著相关。这与基于深度、HRD、IPD和观看距离之间的几何关系的预测一致，表明视觉系统确实基于观察者的IPD校准缩放增益。然而，测量结果并不完全符合从几何的预测。对结果进行了讨论，重点讨论了标度距离估计中的误差。
This study investigated whether the individual difference in the observer’s interpupillary distance (IPD) could cause the individual difference in perceived depth in binocular stereopsis. The horizontal retinal disparity (HRD) is one of the most potent depth cues, but the visual system could not uniquely estimate the metric depth from HRD alone. This is because the size of HRD is determined as a function not only of the size of external depth but also of the viewing distance and IPD. Thus to perceive depth veridically from HRD, observers need to adjust the scaling gain (i.e. the magnification factor when converting HRD to perceived depth), taking their IPD into account. To investigate whether the visual system performs such gain calibration, we examined the relationship between IPD size and perceived depth when observing stereograms (i.e. the visual stimulus of fixed HRD) at a fixed viewing distance with 54 observers. The results showed a significant correlation between perceived depth and IPD. This is consistent with the prediction based on the geometric relationship between depth, HRD, IPD, and viewing distance, suggesting that the visual system does calibrate the scaling gain based on the observer’s IPD. However, the measured results did not fully agree with the predictions from the geometry. The results were discussed, focusing on the errors in the estimation of scaling distance.