PhysFiT: Physical-aware 3D Shape Understanding for Finishing Incomplete Assembly

IF 7.8 1区 计算机科学 Q1 COMPUTER SCIENCE, SOFTWARE ENGINEERING ACM Transactions on Graphics Pub Date : 2024-10-29 DOI:10.1145/3702226
Weihao Wang, Mingyu You, Hongjun Zhou, Bin He
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Abstract

Understanding the part composition and structure of 3D shapes is crucial for a wide range of 3D applications, including 3D part assembly and 3D assembly completion. Compared to 3D part assembly, 3D assembly completion is more complicated which involves repairing broken or incomplete furniture that miss several parts with a toolkit. The primary challenge persists in how to reveal the potential part relations to infer the absent parts from multiple indistinguishable candidates with similar geometries, and complete for well-connected, structurally stable and aesthetically pleasing assemblies. This task necessitates not only specialized knowledge of part composition but, more importantly, an awareness of physical constraints, i.e. , connectivity, stability, and symmetry. Neglecting these constraints often results in assemblies that, although visually plausible, are impractical. To address this challenge, we propose PhysFiT, a physical-aware 3D shape understanding framework. This framework is built upon attention-based part relation modeling and incorporates connection modeling, simulation-free stability optimization and symmetric transformation consistency. We evaluate its efficacy on 3D part assembly and 3D assembly completion, a novel assembly task presented in this work. Extensive experiments demonstrate the effectiveness of PhysFiT in constructing geometrically sound and physically compliant assemblies.
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PhysFiT:物理感知三维形状理解,用于完成不完整装配
了解三维形状的零件组成和结构对于广泛的三维应用(包括三维零件装配和三维装配完成)至关重要。与三维零件装配相比,三维装配完成更为复杂,涉及使用工具包修复缺失多个零件的破损或不完整家具。如何揭示潜在的零件关系,从具有相似几何形状的多个无法区分的候选零件中推断出缺失的零件,并完成连接良好、结构稳定且美观的装配,一直是首要挑战。这项任务不仅需要有关零件组成的专业知识,更重要的是要了解物理约束条件,即连接性、稳定性和对称性。忽视这些约束条件往往会导致组装结果虽然在视觉上看似合理,但却不切实际。为了应对这一挑战,我们提出了物理感知三维形状理解框架 PhysFiT。该框架建立在基于注意力的零件关系建模基础上,并结合了连接建模、无模拟稳定性优化和对称变换一致性。我们评估了该框架在三维零件装配和三维装配完成(这是本研究中提出的一项新的装配任务)方面的功效。大量实验证明,PhysFiT 在构建几何上合理、物理上符合要求的装配方面非常有效。
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来源期刊
ACM Transactions on Graphics
ACM Transactions on Graphics 工程技术-计算机:软件工程
CiteScore
14.30
自引率
25.80%
发文量
193
审稿时长
12 months
期刊介绍: ACM Transactions on Graphics (TOG) is a peer-reviewed scientific journal that aims to disseminate the latest findings of note in the field of computer graphics. It has been published since 1982 by the Association for Computing Machinery. Starting in 2003, all papers accepted for presentation at the annual SIGGRAPH conference are printed in a special summer issue of the journal.
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