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arXiv 2203.07553cs.CV
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VPFusion:用于单视图和多视图3D重建的联合3D体积和像素对齐特征融合

VPFusion: Joint 3D Volume and Pixel-Aligned Feature Fusion for Single and Multi-view 3D Reconstruction

University of North Carolina at Chapel Hill(北卡罗来纳大学教堂山分校)

Jisan Mahmud, Jan-Michael Frahm

摘要:

我们介绍了一个统一的单视图和多视图神经隐式三维重建框架VPFusion。VPFusion使用3D特征量来捕获3D结构感知上下文,并使用像素对齐的图像特征来捕获精细的局部细节,从而实现高质量的重建。现有的方法使用RNN,特征池或在每个视图中独立计算的注意力进行多视图融合。RNN遭受长期记忆损失和置换方差,而特征池或独立计算的注意力导致每个视图中的表示在最终池化步骤之前不知道其他视图。相比之下,我们通过建立基于变换的成对视图关联来改进多视图特征融合。特别是,我们提出了一种新的交错三维推理和成对视图关联架构的特征量融合在不同的意见。使用这种结构感知和多视图感知的特征量,我们表现出改进的3D重建性能相比,现有的方法。VPFusion还通过结合像素对齐的局部图像特征来捕获精细细节,从而进一步提高了重建质量。我们在ShapeNet和ModelNet数据集上验证了VPFusion的有效性,在这些数据集上,我们的性能优于或优于最先进的单视图和多视图3D形状重建方法。

英文摘要:

We introduce a unified single and multi-view neural implicit 3D reconstruction framework VPFusion. VPFusion attains high-quality reconstruction using both - 3D feature volume to capture 3D-structure-aware context, and pixel-aligned image features to capture fine local detail. Existing approaches use RNN, feature pooling, or attention computed independently in each view for multi-view fusion. RNNs suffer from long-term memory loss and permutation variance, while feature pooling or independently computed attention leads to representation in each view being unaware of other views before the final pooling step. In contrast, we show improved multi-view feature fusion by establishing transformer-based pairwise view association. In particular, we propose a novel interleaved 3D reasoning and pairwise view association architecture for feature volume fusion across different views. Using this structure-aware and multi-view-aware feature volume, we show improved 3D reconstruction performance compared to existing methods. VPFusion improves the reconstruction quality further by also incorporating pixel-aligned local image features to capture fine detail. We verify the effectiveness of VPFusion on the ShapeNet and ModelNet datasets, where we outperform or perform on-par the state-of-the-art single and multi-view 3D shape reconstruction methods.

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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