arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1908.06989cs.CV
收藏

三维扫描与CAD物体的联合嵌入

Joint Embedding of 3D Scan and CAD Objects

Technical University of Munich(慕尼黑工业大学);Stanford University(斯坦福大学);Facebook AI Research(脸书人工智能研究院)

Manuel Dahnert, Angela Dai, Leonidas Guibas, Matthias Nießner

摘要:

3D扫描几何形状和CAD模型通常包含用于理解环境的互补信息,可以通过在两个域之间建立映射来利用这些信息。然而,由于扫描和CAD几何结构之间存在较强的低级差异,这是一项具有挑战性的任务。我们提出了一种新的方法来学习扫描和CAD几何形状之间的联合嵌入空间,其中来自两个域的语义相似的对象靠近在一起。为了实现这一目标,我们引入了一种新的基于3D CNN的方法来学习一个联合嵌入空间,该空间表示这些领域中的对象相似性。为了学习扫描对象和CAD模型可以交错的共享空间,我们提出了一种堆叠沙漏方法来从扫描对象中分离前景和背景,并将其转换为完整的CAD表示以产生共享嵌入空间。然后,该嵌入空间可以用于CAD模型检索;为了进一步实现这一任务,我们引入了一个新的排名扫描CAD相似性注释数据集,使新的,细粒度的评估CAD模型检索杂乱,嘈杂,部分扫描。我们学习的联合嵌入在实例检索准确率方面比当前CAD模型检索的最新技术水平高出12%。

英文摘要:

3D scan geometry and CAD models often contain complementary information towards understanding environments, which could be leveraged through establishing a mapping between the two domains. However, this is a challenging task due to strong, lower-level differences between scan and CAD geometry. We propose a novel approach to learn a joint embedding space between scan and CAD geometry, where semantically similar objects from both domains lie close together. To achieve this, we introduce a new 3D CNN-based approach to learn a joint embedding space representing object similarities across these domains. To learn a shared space where scan objects and CAD models can interlace, we propose a stacked hourglass approach to separate foreground and background from a scan object, and transform it to a complete, CAD-like representation to produce a shared embedding space. This embedding space can then be used for CAD model retrieval; to further enable this task, we introduce a new dataset of ranked scan-CAD similarity annotations, enabling new, fine-grained evaluation of CAD model retrieval to cluttered, noisy, partial scans. Our learned joint embedding outperforms current state of the art for CAD model retrieval by 12% in instance retrieval accuracy.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑