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arXiv 2212.05321cs.CV
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HumanGen:利用显式先验生成人体辐射场

HumanGen: Generating Human Radiance Fields with Explicit Priors

ShanghaiTech University(上海科技大学);University of Toronto(多伦多大学);Shanghai Engineering Research Center of Intelligent Vision and Imaging(上海智能视觉与成像工程技术研究中心)

Suyi Jiang, Haoran Jiang, Ziyu Wang, Haimin Luo, Wenzheng Chen, Lan Xu

摘要:

近年来,3D GANs在生成具有照片真实感的视图一致性辐射场方面取得了巨大进展。然而,高质量的人类辐射场的生成仍然具有挑战性,部分原因是现有方法中采用的有限的人类相关先验。我们提出了HumanGen,一个新的三维人体生成方案,详细的几何和$\text{360}^{\circ}$真实感自由视图渲染。它明确地通过“锚图像”的设计将3D人体生成与来自2D生成器和3D人体重建器的各种先验知识结合起来。我们引入了一种混合特征表示,使用锚图像来桥接HumanGen的潜在空间与现有的2D生成器。然后,我们采用了一个多管齐下的设计来解开几何和外观的生成。在锚图像的帮助下,我们采用3D重建器进行细粒度的细节合成,并提出了一个两阶段的混合方案,以提高外观生成。大量的实验证明了我们的有效性,为国家的最先进的3D人体生成几何细节,纹理质量和自由视图的性能。值得注意的是,HumanGen还可以整合各种现成的2D潜在编辑方法,将其无缝提升到3D。

英文摘要:

Recent years have witnessed the tremendous progress of 3D GANs for generating view-consistent radiance fields with photo-realism. Yet, high-quality generation of human radiance fields remains challenging, partially due to the limited human-related priors adopted in existing methods. We present HumanGen, a novel 3D human generation scheme with detailed geometry and $\text{360}^{\circ}$ realistic free-view rendering. It explicitly marries the 3D human generation with various priors from the 2D generator and 3D reconstructor of humans through the design of "anchor image". We introduce a hybrid feature representation using the anchor image to bridge the latent space of HumanGen with the existing 2D generator. We then adopt a pronged design to disentangle the generation of geometry and appearance. With the aid of the anchor image, we adapt a 3D reconstructor for fine-grained details synthesis and propose a two-stage blending scheme to boost appearance generation. Extensive experiments demonstrate our effectiveness for state-of-the-art 3D human generation regarding geometry details, texture quality, and free-view performance. Notably, HumanGen can also incorporate various off-the-shelf 2D latent editing methods, seamlessly lifting them into 3D.

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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