arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2208.04448cs.LGcs.CVcs.GR
收藏

NeuralVDB:使用分层神经网络的高分辨率稀疏体积表示

NeuralVDB: High-resolution Sparse Volume Representation using Hierarchical Neural Networks

NVIDIA(英伟达)

Doyub Kim, Minjae Lee, Ken Museth

AI总结:

NeuralVDB通过分层神经网络分别编码VDB树低层节点的拓扑与值信息,在保持空间适应性的同时实现10倍至100倍以上的高压缩比,且优于其他神经表示方法。

摘要:

我们引入了NeuralVDB,它通过利用机器学习的最新进展,改进了现有的稀疏体积数据高效存储行业标准VDB [Museth 2013]。我们新颖的混合数据结构能将VDB体积的内存占用减少几个数量级,同时保持其灵活性,且仅产生微小的(用户可控的)压缩误差。具体而言,NeuralVDB用一个浅而宽的VDB树结构的较低层节点替换为多个分层神经网络,这些网络分别通过神经分类器和回归器对拓扑和值信息进行编码。这种方法被证明能最大化压缩比,同时保持更高级别VDB数据结构提供的空间自适应性。对于稀疏有符号距离场和密度体积,我们观察到从已压缩的VDB输入中实现了10倍到100倍以上的压缩比,且几乎没有视觉伪影。此外,与Neural Geometric Level of Detail [Takikawa et al. 2021]、Variable Bitrate Neural Fields [Takikawa et al. 2022a]和Instant Neural Graphics Primitives [Müller et al. 2022]等其他神经表示相比,NeuralVDB展现出更有效的压缩性能。最后,我们演示了如何从先前帧进行热启动可以加速动画体积的训练(即压缩),并改善模型推理(即解压缩)的时间相干性。

英文摘要:

We introduce NeuralVDB, which improves on an existing industry standard for efficient storage of sparse volumetric data, denoted VDB [Museth 2013], by leveraging recent advancements in machine learning. Our novel hybrid data structure can reduce the memory footprints of VDB volumes by orders of magnitude, while maintaining its flexibility and only incurring small (user-controlled) compression errors. Specifically, NeuralVDB replaces the lower nodes of a shallow and wide VDB tree structure with multiple hierarchical neural networks that separately encode topology and value information by means of neural classifiers and regressors respectively. This approach is proven to maximize the compression ratio while maintaining the spatial adaptivity offered by the higher-level VDB data structure. For sparse signed distance fields and density volumes, we have observed compression ratios on the order of 10x to more than 100x from already compressed VDB inputs, with little to no visual artifacts. Furthermore, NeuralVDB is shown to offer more effective compression performance compared to other neural representations such as Neural Geometric Level of Detail [Takikawa et al. 2021], Variable Bitrate Neural Fields [Takikawa et al. 2022a], and Instant Neural Graphics Primitives [Müller et al. 2022]. Finally, we demonstrate how warm-starting from previous frames can accelerate training, i.e., compression, of animated volumes as well as improve temporal coherency of model inference, i.e., decompression.

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。

↑