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arXiv 2412.14166cs.CV
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MegaSynth:利用合成数据扩展三维场景重建

MegaSynth: Scaling Up 3D Scene Reconstruction with Synthesized Data

The University of Texas at Austin(德克萨斯大学奥斯汀分校);Adobe Research(奥多比研究院);Stony Brook University(石溪大学);Oregon State University(俄勒冈州立大学);Cornell University(康奈尔大学)

Hanwen Jiang, Zexiang Xu, Desai Xie, Ziwen Chen, Haian Jin, Fujun Luan, Zhixin Shu, Kai Zhang, Sai Bi, Xin Sun, Jiuxiang Gu, Qixing Huang, Georgios Pavlakos, Hao Tan

AI总结:

提出用程序化生成的70万场景数据集MegaSynth训练三维重建模型,消除语义信息实现可扩展,联合训练或预训练提升重建质量1.2-1.8 dB PSNR,仅用合成数据即可媲美真实数据训练效果。

摘要:

我们提出通过使用合成数据进行训练来扩展三维场景重建。我们工作的核心是MegaSynth,一个程序化生成的三维数据集,包含70万场景——比之前的真实数据集DL3DV大50多倍——极大地扩展了训练数据。为了实现可扩展的数据生成,我们的关键思想是消除语义信息,无需建模复杂的语义先验,如物体可供性和场景构图。相反,我们用基本空间结构和几何基元对场景进行建模,提供可扩展性。此外,我们控制数据复杂度以促进训练,同时使其与真实数据分布大致对齐,以利于真实世界的泛化。我们探索使用MegaSynth和可用的真实数据训练LRM。实验结果表明,使用MegaSynth进行联合训练或预训练,在多种图像域上将重建质量提高了1.2至1.8 dB PSNR。此外,仅使用MegaSynth训练的模型与使用真实数据训练的模型表现相当,突显了三维重建的低层次特性。我们还对MegaSynth在增强模型能力、训练稳定性和泛化性方面的特性进行了深入分析,并探讨了其在其他任务中的应用。

英文摘要:

We propose scaling up 3D scene reconstruction by training with synthesized data. At the core of our work is MegaSynth, a procedurally generated 3D dataset comprising 700K scenes - over 50 times larger than the prior real dataset DL3DV - dramatically scaling the training data. To enable scalable data generation, our key idea is eliminating semantic information, removing the need to model complex semantic priors such as object affordances and scene composition. Instead, we model scenes with basic spatial structures and geometry primitives, offering scalability. Besides, we control data complexity to facilitate training while loosely aligning it with real-world data distribution to benefit real-world generalization. We explore training LRMs with both MegaSynth and available real data. Experiment results show that joint training or pre-training with MegaSynth improves reconstruction quality by 1.2 to 1.8 dB PSNR across diverse image domains. Moreover, models trained solely on MegaSynth perform comparably to those trained on real data, underscoring the low-level nature of 3D reconstruction. Additionally, we provide an in-depth analysis of MegaSynth's properties for enhancing model capability, training stability, and generalization, as well as application to other tasks.

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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