Abstract When a viewer watches a virtual image through a see-through augmented reality (AR) device and an outside view simultaneously, the viewer’s attentiveness is affected. In this study, the authors examined the relationship between the viewer’s attentiveness and viewing distance of the outside view. The virtual image in the see-through AR device was at a fixed distance of 2.5 m, while a TV at distances of 0.33, 1, 2.5 and 5 m was considered as the outside view. In this experiment, thirty participants viewed a movie on an AR device and ten target images of pictures and words were sequentially displayed on the TV by overlapping them onto the virtual image. The participants were then asked to identify these target images from examples of sixty images. A correct answer (CA) ratio was used to measure the participant’s attentiveness. Results demonstrated that CA ratios at distances of 0.33 and 1 m was better than CA ratios at distances of 2.5 and 5 m. Further, the CA ratio of target images of pictures was better than that of words. When the virtual and target images were located at similar distances, these images were sharply focused on the retina. However, when the distances of these images were different, the participant’s eyes focused on one image causing a defocus on the other. A better CA ratio at different distances implied that the difference of sharpness in overlapped virtual and target images helped the participants in identifying the virtual or target image rather than two overlapped images of similar sharpness. Thus, sharply focused virtual and target images at the same distance did not guarantee better identification of two distinct images.

中文翻译：

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外景对使用透视型增强现实设备注意力的影响

摘要 当观看者通过透视增强现实（AR）设备和外部视图同时观看虚拟图像时，观看者的注意力会受到影响。在这项研究中，作者研究了观看者的注意力与外界视野的观看距离之间的关系。透视 AR 设备中的虚拟图像在 2.5 m 的固定距离处，而在 0.33、1、2.5 和 5 m 距离处的电视被视为外部视图。在这个实验中，三十名参与者在 AR 设备上观看了电影，十张图片和文字的目标图像通过重叠在虚拟图像上的方式依次显示在电视上。然后要求参与者从 60 张图像的示例中识别这些目标图像。正确答案 (CA) 比率用于衡量参与者的注意力。结果表明，0.33 和 1 m 距离处的 CA 比优于 2.5 和 5 m 距离处的 CA 比。此外，图片的目标图像的CA比率优于单词的CA比率。当虚拟图像和目标图像位于相似距离时，这些图像会清晰地聚焦在视网膜上。然而，当这些图像的距离不同时，参与者的眼睛会聚焦在一个图像上，从而导致在另一个图像上散焦。不同距离下更好的 CA 比意味着重叠的虚拟图像和目标图像的清晰度差异有助于参与者识别虚拟或目标图像，而不是两个具有相似清晰度的重叠图像。因此，在相同距离处清晰聚焦的虚拟图像和目标图像并不能保证更好地识别两个不同的图像。