Lee Sangyoon, Hua Hong
IEEE Trans Vis Comput Graph. 2024 Jun 12;PP. doi: 10.1109/TVCG.2024.3413594.
Through a human-subject experiment, we investigated the effects of focal distance on depth perception and accommodative response in an optical see-through augmented reality (AR) display. The display was able to provide focus cues and was rigorously calibrated. The near-field distances ranging between 3 diopters and 1 diopter were considered as target distance. In the experiment, it was found that the perceived depth of a virtual object was significantly biased along with the focal distance of virtual image plane of the display. In addition, the experimental results implied that the perceived depth of a virtual object would be potentially more accurate in the condition where the focal distance of virtual image plane was consistent with the target distance than in the conditions where it could deviate from the target distance. Regarding accommodative response, it was found that the response to a virtual object changed along with the focal distance of virtual image plane as well as the target distance. However, the changing rate depending on target distance was less steep in the conditions where the focal distance could be mismatched with the target distance than in the condition where it was consistent with the target distance. In the consistent condition, the changing rate of accommodative responses to virtual objects were similar to that for their physical counterparts.
通过一项人体实验，我们研究了焦距对光学透视增强现实（AR）显示器中深度感知和调节反应的影响。该显示器能够提供聚焦线索并经过严格校准。近场距离在3屈光度和1屈光度之间被视为目标距离。在实验中，发现虚拟物体的感知深度会随着显示器虚拟图像平面的焦距而产生显著偏差。此外，实验结果表明，与虚拟图像平面焦距偏离目标距离的情况相比，在虚拟图像平面焦距与目标距离一致的情况下，虚拟物体的感知深度可能会更准确。关于调节反应，发现对虚拟物体的反应会随着虚拟图像平面的焦距以及目标距离而变化。然而，在焦距与目标距离不匹配的情况下，调节反应随目标距离的变化率比焦距与目标距离一致的情况要平缓。在一致的情况下，对虚拟物体的调节反应变化率与对实际物体的调节反应变化率相似。
