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arXiv 1906.04201cs.CV
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3D扫描中的端到端CAD模型检索和9DoF对齐

End-to-End CAD Model Retrieval and 9DoF Alignment in 3D Scans

Technical University of Munich(慕尼黑工业大学)

Armen Avetisyan, Angela Dai, Matthias Nießner

摘要:

我们提出了一种新颖的,端到端的方法来对齐CAD模型的3D扫描的场景,使嘈杂的,不完整的3D扫描到一个紧凑的,CAD重建干净,完整的对象几何形状的转换。我们的主要贡献在于制定一个可微的Procrustes对齐,是配对的感知密集对象对应预测。为了同时将CAD模型与扫描场景的所有对象对齐,我们的方法检测对象位置,然后在统一的对象空间中预测扫描和CAD几何形状之间的密集对象对应关系,以及最近邻CAD模型,然后两者都用于通知可微的Procrustes对齐。我们的方法以完全卷积的方式运行,使CAD模型与扫描对象在单个向前传递中对齐。这使得我们的方法能够优于$19.04\%$用于CAD模型与扫描对齐的最先进方法,并且$\approx 250\times$的运行时间比以前的数据驱动方法更快。

英文摘要:

We present a novel, end-to-end approach to align CAD models to an 3D scan of a scene, enabling transformation of a noisy, incomplete 3D scan to a compact, CAD reconstruction with clean, complete object geometry. Our main contribution lies in formulating a differentiable Procrustes alignment that is paired with a symmetry-aware dense object correspondence prediction. To simultaneously align CAD models to all the objects of a scanned scene, our approach detects object locations, then predicts symmetry-aware dense object correspondences between scan and CAD geometry in a unified object space, as well as a nearest neighbor CAD model, both of which are then used to inform a differentiable Procrustes alignment. Our approach operates in a fully-convolutional fashion, enabling alignment of CAD models to the objects of a scan in a single forward pass. This enables our method to outperform state-of-the-art approaches by $19.04\%$ for CAD model alignment to scans, with $\approx 250\times$ faster runtime than previous data-driven approaches.

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。

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