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Digital Reconstruction of Elmina Castle for Mobile Virtual Reality via Point-based Detail Transfer
arXiv - CS - Multimedia Pub Date : 2020-12-19 , DOI: arxiv-2012.10739
Sifan Ye, Ting Wu, Michael Jarvis, Yuhao Zhu

Reconstructing 3D models from large, dense point clouds is critical to enable Virtual Reality (VR) as a platform for entertainment, education, and heritage preservation. Existing 3D reconstruction systems inevitably make trade-offs between three conflicting goals: the efficiency of reconstruction (e.g., time and memory requirements), the visual quality of the constructed scene, and the rendering speed on the VR device. This paper proposes a reconstruction system that simultaneously meets all three goals. The key idea is to avoid the resource-demanding process of reconstructing a high-polygon mesh altogether. Instead, we propose to directly transfer details from the original point cloud to a low polygon mesh, which significantly reduces the reconstruction time and cost, preserves the scene details, and enables real-time rendering on mobile VR devices. While our technique is general, we demonstrate it in reconstructing cultural heritage sites. We for the first time digitally reconstruct the Elmina Castle, a UNESCO world heritage site at Ghana, from billions of laser-scanned points. The reconstruction process executes on low-end desktop systems without requiring high processing power, making it accessible to the broad community. The reconstructed scenes render on Oculus Go in 60 FPS, providing a real-time VR experience with high visual quality. Our project is part of the Digital Elmina effort (http://digitalelmina.org/) between University of Rochester and University of Ghana.

中文翻译:

通过基于点的详细信息传递实现移动虚拟现实的Elmina Castle的数字重建

从大型密集点云重构3D模型对于使虚拟现实(VR)成为娱乐,教育和遗产保护的平台至关重要。现有的3D重建系统不可避免地要在三个相互冲突的目标之间进行权衡:重建效率(例如,时间和内存要求),所构建场景的视觉质量以及VR设备上的渲染速度。本文提出了一种同时满足所有三个目标的重建系统。关键思想是避免完全重建高多边形网格的资源需求过程。取而代之的是,我们建议将细节从原始点云直接转移到低多边形网格中,这样可以显着减少重建时间和成本,保留场景细节,并可以在移动VR设备上进行实时渲染。虽然我们的技术是通用的,但我们在重建文化遗产时证明了这一点。我们首次从数十亿激光扫描点数字化重建了联合国教科文组织在加纳的世界遗产Elmina城堡。重建过程可以在低端桌面系统上执行,而无需强大的处理能力,因此广泛的社区都可以使用。重建的场景以60 FPS的速度在Oculus Go上渲染,提供具有高视觉质量的实时VR体验。我们的项目是罗切斯特大学和加纳大学之间的Digital Elmina工作(http://digitalelmina.org/)的一部分。来自数十亿激光扫描点的联合国教科文组织世界遗产地。重建过程可以在低端桌面系统上执行,而无需强大的处理能力,因此广泛的社区都可以使用。重建的场景以60 FPS的速度在Oculus Go上渲染,提供具有高视觉质量的实时VR体验。我们的项目是罗切斯特大学和加纳大学之间的Digital Elmina工作(http://digitalelmina.org/)的一部分。来自数十亿激光扫描点的联合国教科文组织世界遗产地。重建过程可以在低端桌面系统上执行,而无需强大的处理能力,因此广泛的社区都可以使用。重建的场景以60 FPS的速度在Oculus Go上渲染,提供具有高视觉质量的实时VR体验。我们的项目是罗切斯特大学和加纳大学之间的Digital Elmina工作(http://digitalelmina.org/)的一部分。
更新日期:2020-12-22
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