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arXiv 2308.09705cs.CV
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Guide3D:根据文本和图像引导创建3D化身

Guide3D: Create 3D Avatars from Text and Image Guidance

The University of Hong Kong(香港大学);ARC Lab, Tencent PCG(腾讯平台与内容事业群ARC实验室)

Yukang Cao, Yan-Pei Cao, Kai Han, Ying Shan, Kwan-Yee K. Wong

AI总结:

本文提出零样本框架Guide3D,结合扩散模型生成稀疏视图图像,并通过像素对齐特征、相似性感知融合和新型训练目标优化3D化身,实现优于现有方法的几何与纹理质量。

摘要:

近年来,文本到图像生成取得了显著进展,能够生成视觉上令人印象深刻的结果。相比之下,文本到3D生成尚未达到相当的质量水平。现有方法主要依赖文本引导的分数蒸馏采样(SDS),并且在将生成图像的2D属性迁移到3D内容方面存在困难。在本研究中,我们旨在开发一种有效的3D生成模型,能够同时利用文本和图像信息合成高分辨率带纹理网格。为此,我们提出Guide3D,这是一种基于扩散模型、用于3D化身生成的零样本文本与图像引导生成模型。我们的模型包括:(1)使用扩散模型生成与文本一致的角色的稀疏视图图像;(2)利用像素对齐的图像特征联合优化多分辨率可微行进四面体网格。我们进一步提出一种相似性感知的特征融合策略,以高效整合来自不同视图的特征。此外,我们引入两个新颖的训练目标,作为计算SDS的替代方案,显著增强了优化过程。我们全面评估了该框架的性能和组成部分;在生成拓扑和结构正确的几何以及高分辨率纹理方面,该框架优于当前最先进方法。Guide3D能够将2D生成图像直接迁移到3D空间。我们的代码将公开发布。

英文摘要:

Recently, text-to-image generation has exhibited remarkable advancements, with the ability to produce visually impressive results. In contrast, text-to-3D generation has not yet reached a comparable level of quality. Existing methods primarily rely on text-guided score distillation sampling (SDS), and they encounter difficulties in transferring 2D attributes of the generated images to 3D content. In this work, we aim to develop an effective 3D generative model capable of synthesizing high-resolution textured meshes by leveraging both textual and image information. To this end, we introduce Guide3D, a zero-shot text-and-image-guided generative model for 3D avatar generation based on diffusion models. Our model involves (1) generating sparse-view images of a text-consistent character using diffusion models, and (2) jointly optimizing multi-resolution differentiable marching tetrahedral grids with pixel-aligned image features. We further propose a similarity-aware feature fusion strategy for efficiently integrating features from different views. Moreover, we introduce two novel training objectives as an alternative to calculating SDS, significantly enhancing the optimization process. We thoroughly evaluate the performance and components of our framework, which outperforms the current state-of-the-art in producing topologically and structurally correct geometry and high-resolution textures. Guide3D enables the direct transfer of 2D-generated images to the 3D space. Our code will be made publicly available.

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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