Generating Diverse 3D Shapes with Open Surfaces Using Conditional Unsigned Distance Field Diffusion

Core Concepts

UDiFF, a 3D diffusion model, can generate textured 3D shapes with open surfaces from text conditions or unconditionally by leveraging an optimal wavelet transformation for compact unsigned distance field representation.

Abstract

The paper proposes UDiFF, a 3D diffusion model for generating textured 3D shapes with open surfaces. The key contributions are:

UDiFF can generate 3D shapes with open surfaces, unlike previous methods that are limited to closed surfaces. This is achieved by representing shapes as unsigned distance fields (UDFs) instead of signed distance functions (SDFs) or occupancy functions.

The paper introduces an optimal wavelet transformation for UDFs through data-driven optimization. This produces a compact representation space for efficient UDF generation by diffusion models.

UDiFF incorporates conditional cross-attention to enable text-guided 3D generation. It also generates textures for the shapes using a Text2Tex framework.

Extensive evaluations on the DeepFashion3D and ShapeNet datasets demonstrate UDiFF's superior performance in generating high-fidelity 3D shapes with open surfaces compared to state-of-the-art methods.

Stats

The paper uses the DeepFashion3D and ShapeNet datasets for evaluations.

Quotes

"UDiFF, a 3D diffusion model, can generate textured 3D shapes with open surfaces from text conditions or unconditionally by leveraging an optimal wavelet transformation for compact unsigned distance field representation."
"We propose a data-driven approach to obtain an optimal wavelet filter for representing UDFs, which preserves more geometry details and leads to high-fidelity generation of 3D shapes."

Key Insights Distilled From

UDiFF

by Junsheng Zho... at arxiv.org 04-11-2024

https://arxiv.org/pdf/2404.06851.pdf

Deeper Inquiries

How can the proposed UDiFF framework be extended to handle other types of 3D data representations beyond unsigned distance fields

The UDiFF framework can be extended to handle other types of 3D data representations beyond unsigned distance fields by adapting the model architecture and training process to accommodate different data formats. For example, if the goal is to work with point clouds, the generator network can be modified to process point cloud data directly, and the fine predictor can be adjusted to predict finer details specific to point cloud structures. Additionally, the conditioning mechanism can be tailored to incorporate features relevant to point clouds, such as local point densities or geometric features. By customizing the components of the UDiFF framework to suit the characteristics of different 3D data representations, the model can effectively generate diverse shapes across various data formats.

What are the potential applications of the generated 3D shapes with open surfaces beyond fashion and consumer products

The generated 3D shapes with open surfaces have a wide range of potential applications beyond fashion and consumer products. Some of these applications include:

Architecture and Urban Planning: The ability to generate 3D shapes with open surfaces can be valuable in architectural design and urban planning. Architects and city planners can use these models to visualize and plan buildings, parks, and urban spaces with intricate details and realistic textures.
Medical Imaging: In the field of medical imaging, 3D shapes with open surfaces can be utilized for anatomical modeling, surgical planning, and simulation. Surgeons can benefit from accurate and detailed 3D models for pre-operative analysis and training.
Virtual Reality and Gaming: The generated shapes can enhance virtual reality experiences and gaming environments by providing realistic and visually appealing assets with open surfaces. This can improve immersion and engagement for users in virtual worlds.
Industrial Design: Industries such as automotive, aerospace, and product design can leverage the 3D shapes for prototyping, visualization, and design iterations. The open surfaces allow for the creation of complex and detailed designs for various products and components.

Can the learned optimal wavelet transformation be further utilized for other 3D processing tasks, such as compression or reconstruction

The learned optimal wavelet transformation in the UDiFF framework can be further utilized for other 3D processing tasks, such as compression or reconstruction, by leveraging the compact representation space generated through the wavelet transformation. Some potential applications include:

3D Data Compression: The optimal wavelet transformation can be applied to compress 3D data representations efficiently while preserving important geometric details. By encoding 3D shapes into a compact wavelet domain, the data can be stored or transmitted more effectively, reducing storage and bandwidth requirements.
3D Reconstruction: The learned wavelet transformation can aid in reconstructing 3D shapes from incomplete or noisy data. By utilizing the optimized wavelet filter parameters, the reconstruction process can be enhanced to generate more accurate and detailed 3D models from sparse or imperfect input data.
Feature Extraction: The wavelet transformation can be used for extracting meaningful features from 3D data representations. By analyzing the coefficients in the wavelet domain, important characteristics of the shapes can be identified and utilized for various tasks such as shape classification, segmentation, or pattern recognition.