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Point-cloud avatars to improve spatial communication in immersive collaborative virtual environments
Personal and Ubiquitous Computing Pub Date : 2020-07-12 , DOI: 10.1007/s00779-020-01431-1
Guillaume Gamelin , Amine Chellali , Samia Cheikh , Aylen Ricca , Cedric Dumas , Samir Otmane

Collaborative virtual environments allow remote users to work together in a shared 3D space. To take advantage of the possibilities offered by such systems, their design must allow the users to interact and communicate efficiently. One open question in this field concerns the avatar fidelity of remote partners. This can impact communication between the remote users, more particularly when performing collaborative spatial tasks. In this paper, we present an experimental study comparing the effects of two partner’s avatars on collaboration during spatial tasks. The first avatar was based on a 2.5D streamed point-cloud and the second avatar was based on a 3D preconstructed avatar replicating the remote user movements. These avatars differ in their fidelity levels described through two components: visual and kinematic fidelity. The collaborative performance was evaluated through the efficacy of completing two spatial communication tasks, a pointing task and spatial guidance task. The results indicate that the streamed point-cloud avatar permitted a significant improvement of the collaborative performance for both tasks. The subjective evaluation suggests that these differences in performance can mainly be attributed to the higher kinematic fidelity of this representation as compared with the 3D preconstructed avatar representation. We conclude that, when designing spatial collaborative virtual environments, it is important to reach a high kinematic fidelity of the partner’s representation while a moderate visual fidelity of this representation can suffice.



中文翻译:

点云化身可改善沉浸式协作虚拟环境中的空间通信

协作虚拟环境允许远程用户在共享的3D空间中一起工作。为了利用这种系统提供的可能性,其设计必须允许用户进行有效的交互和通信。这个领域的一个悬而未决的问题是远程合作伙伴的头像保真度。这会影响远程用户之间的通信,尤其是在执行协作空间任务时。在本文中,我们提供了一项实验研究,比较了两个伙伴的化身对空间任务期间协作的影响。第一个化身基于2.5D流式点云,第二个化身基于3D预制的化身来复制远程用户的动作。这些化身的保真度级别通过两个部分描述:视觉保真度和运动保真度。通过完成两个空间交流任务,指向任务和空间指导任务的功效来评估协作绩效。结果表明,流式点云化身允许显着改善两个任务的协作性能。主观评估表明,这些性能差异主要归因于与3D预先构造的化身表示相比,该表示具有较高的运动保真度。我们得出的结论是,在设计空间协作虚拟环境时,重要的是要达到伙伴表示形式的高运动保真度,而该表示形式的中等视觉保真度就足够了。指向任务和空间指导任务。结果表明,流式点云化身允许显着改善两个任务的协作性能。主观评估表明,这些性能差异主要归因于与3D预先构造的化身表示相比,该表示具有较高的运动保真度。我们得出的结论是,在设计空间协作虚拟环境时,重要的是要达到伙伴表示形式的高运动保真度,而该表示形式的中等视觉保真度就足够了。指向任务和空间指导任务。结果表明,流式点云化身允许显着改善两个任务的协作性能。主观评估表明,这些性能差异主要归因于与3D预先构造的化身表示相比,该表示具有较高的运动保真度。我们得出的结论是,在设计空间协作虚拟环境时,重要的是要达到伙伴表示形式的高运动保真度,而该表示形式的中等视觉保真度就足够了。主观评估表明,这些性能差异主要归因于与3D预先构造的化身表示相比,该表示具有较高的运动保真度。我们得出的结论是,在设计空间协作虚拟环境时,重要的是要达到伙伴表示形式的高运动保真度,而该表示形式的中等视觉保真度就足够了。主观评估表明,这些性能差异主要归因于与3D预先构造的化身表示相比,该表示具有较高的运动保真度。我们得出的结论是,在设计空间协作虚拟环境时,重要的是要达到伙伴表示形式的高运动保真度,而该表示形式的中等视觉保真度就足够了。

更新日期:2020-07-13
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