RealityCheck: A Tool to Evaluate Spatial Inconsistency in Augmented Reality
RealityCheck: A Tool to Evaluate Spatial Inconsistency in Augmented Reality
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DOI：
10.1109/ism52913.2021.00018
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发表时间：
2021-11
期刊：
影响因子：
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通讯作者：
Carter Slocum;Xukan Ran;Jiasi Chen
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文献类型：
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作者：
Carter Slocum;Xukan Ran;Jiasi Chen
在增强现实（AR）中，虚拟对象可能会偏离其原始预期位置，这会严重影响用户体验。传统上，虚拟对象的漂移是通过设备定位漂移来近似估算的，这种定位漂移是使用诸如3D扫描仪或基于激光的定位系统等专用硬件来测量的。然而，随着AR迅速变得更加流行，需要一种轻量级的、基于软件的方法来评估虚拟对象的漂移。该软件应该便于研究人员和开发人员使用，不需要专用硬件或大量的环境设置。为此，本文介绍了RealityCheck，这是一种开源的AR评估工具，它能报告AR虚拟对象在世界坐标系中的漂移，只需要纸质打印件，并且对AR应用程序只需进行最小的修改。RealityCheck旨在测量单个用户的虚拟对象随时间的漂移，以及多个用户所看到的同一虚拟对象的定位差异。我们的原型是在运行ARCore平台的安卓智能手机上实现的，并在室内和室外场景下，针对具有不同长度轨迹的各种用户移动模式进行了评估。我们将RealityCheck的结果与虚拟对象的真实位置进行了比较，结果表明RealityCheck与真实位置平均误差在1.5厘米以内。
In augmented reality (AR), virtual objects can drift away from their original intended locations, significantly impairing a user’s experience. Traditionally, a virtual object’s drift is approximated by the device localization drift, which is measured using specialized hardware such as 3D scanners or laser-based positioning systems. However, with AR rapidly becoming more popular, there is a need for a lightweight, software-based approach to evaluate the drift of virtual objects. This software should be easy for researchers and developers to use, without requiring specialized hardware or extensive environment setup.Towards this, this paper presents RealityCheck, an opensource AR evaluation tool that reports the drift of AR virtual objects in the world coordinate system, requiring only paper printouts and minimal modifications to the AR app. RealityCheck is designed to measure the drift of a virtual object across time of a single user, as well as the positioning differences of the same virtual objects as seen by multiple users. Our prototype is implemented on an Android smartphone running the ARCore platform, and evaluated in indoor and outdoor scenarios under a variety of user mobility patterns with traces of different lengths. We compared the results of RealityCheck with the ground truth position of the virtual object, and showed that RealityCheck matches the ground truth within 1.5 cm on average.