Effects of AR Display Context Switching and Focal Distance Switching on Human Performance (vol 25, pg 2228, 2019)
Effects of AR Display Context Switching and Focal Distance Switching on Human Performance (vol 25, pg 2228, 2019)
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DOI：
10.1109/tvcg.2018.2832633
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发表时间：
2019-06-01
影响因子：
5.2
通讯作者：
Swan, J. Edward, II
中科院分区：
文献类型：
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作者：
Gabbard, Joseph L.;Mehra, Divya Gupta;Swan, J. Edward, II
在增强现实（AR）环境中，信息通常分布在真实的世界和虚拟环境之间，并且通常出现在距用户不同的距离处。因此，为了整合信息，用户必须反复切换上下文并重新聚焦眼睛。为了在不同的距离聚焦，用户的眼睛必须适应，这在重复进行时会导致眼睛疲劳并降低任务性能。使用基于文本的视觉搜索任务和单目光学透视AR显示器，进行了检查在真实的和AR环境之间切换上下文和焦距的实验。上下文切换和焦距切换都导致性能显著降低。此外，重复执行任务导致视觉疲劳稳步增加。对于在光学无限远呈现的虚拟文本，以及参与者试图在眼睛完全适应新焦距之前阅读的目标字母，性能尤其差。结果表明，上下文切换和焦距切换是重要的AR用户界面设计问题。
In augmented reality (AR) environments, information is often distributed between real world and virtual contexts, and often appears at different distances from the user. Therefore, to integrate the information, users must repeatedly switch context and refocus the eyes. To focus at different distances, the user's eyes must accommodate, which when done repeatedly can cause eyestrain and degrade task performance. An experiment was conducted that examined switching context and focal distance between a real and an AR environment, using a text-based visual search task and a monocular optical see-through AR display. Both context switching and focal distance switching resulted in significantly reduced performance. In addition, repeatedly performing the task caused visual fatigue to steadily increase. Performance was particularly poor for virtual text presented at optical infinity, and for target letters that participants tried to read before their eyes had completely accommodated to a new focal distance. The results show that context switching and focal distance switching are important AR user interface design issues.