Factor Fields

Project page | Paper

This repository contains a pytorch implementation for the paper: Factor Fields: A Unified Framework for Neural Fields and Beyond and Dictionary Fields: Learning a Neural Basis Decomposition. Our work present a novel framework for modeling and representing signals, we have also observed that Dictionary Fields offer benefits such as improved approximation quality, compactness, faster training speed, and the ability to generalize to unseen images and 3D scenes.

Installation

Tested on Ubuntu 20.04 + Pytorch 1.13.0

Install environment:

conda create -n FactorFields python=3.9
conda activate FactorFields
conda install -c "nvidia/label/cuda-11.7.1" cuda-toolkit
conda install pytorch==1.13.0 torchvision==0.14.0 torchaudio==0.13.0 pytorch-cuda=11.7 -c pytorch -c nvidia
pip install -r requirements.txt 

Optionally install tiny-cuda-nn, only needed if you want to run hash grid based representations.

conda install -c "nvidia/label/cuda-11.7.1" cuda-toolkit
pip install git+https://github.com/NVlabs/tiny-cuda-nn/#subdirectory=bindings/torch

Quick Start

Please ensure that you download the corresponding dataset and extract its contents into the data folder.

Image

• Data - Image Set

The training script can be found at scripts/2D_regression.ipynb, and the configuration file is located at configs/image.yaml.

SDF

• Data - Mesh set

The training script can be found at scripts/sdf_regression.ipynb, and the configuration file is located at configs/sdf.yaml.

NeRF

• Data - Synthetic-NeRF
• Data-Tanks&Temples

The training script can be found at train_per_scene.py:

pythontrain_per_scene.pyconfigs/nerf.yamldefaults.expname=legodataset.datadir=./data/nerf_synthetic/lego

<img src="https://github.com/apchenstu/GIFs/blob/main/FactorField-mic.gif" alt="GIF" width="500px"

Generalization Image

• Data - FFHQ

The training script can be found at 2D_set_regression.ipynb

Generalization NeRF

• Data - Google Scanned Objects

pythontrain_across_scene.pyconfigs/nerf_set.yaml

More examples

Command explanation with a nerf example:

• model.basis_dims=[4, 4, 4, 2, 2, 2] adjusts the number of levels and channels at each level, with a total of 6 levels and 18 channels.
• model.basis_resos=[32, 51, 70, 89, 108, 128] represents the resolution of the feature embeddings.
• model.freq_bands=[2.0, 3.2, 4.4, 5.6, 6.8, 8.0] indicates the frequency parameters applied at each level of the coordinate transformation function.
• model.coeff_type represents the coefficient field representations and can be one of the following: [none, x, grid, mlp, vec, cp, vm].
• model.basis_type represents the basis field representation and can be one of the following: [none, x, grid, mlp, vec, cp, vm, hash].
• model.basis_mapping represents the coordinate transformation and can be one of the following: [x, triangle, sawtooth, trigonometric]. Please note that if you want to use orthogonal projection, choose the cp or vm basis type, as they automatically utilize the orthogonal projection functions.
• model.total_params controls the total model size. It is important to note that the model's size capability is determined by model.basis_resos and model.basis_dims. The total_params parameter mainly affects the capability of the coefficients.
• exportation.render_only you can rendering item after training by setting this label to 1. Please also specify the defaults.ckpt label.
• exportation.... you can specify whether to render the items of [render_test, render_train, render_path, export_mesh] after training by enable the corressponding label to 1.

Some pre-defined configurations (such as occNet, DVGO, nerf, iNGP, EG3D) can be found in README_FactorField.py.

COPY RIGHT

• Summer Day - Credit goes to Johan Hendrik Weissenbruch and rijksmuseum.
• Mars - Credit goes to NASA.
• Albert - Credit goes to Orren Jack Turner.
• Girl With a Pearl Earring - Renovation copyright Koorosh Orooj (CC BY-SA 4.0).

Citation

If you find our code or paper helpful, please consider citing both of these papers:

@article{Chen2023factor,
title={Factor Fields: A Unified Framework for Neural Fields and Beyond},
author={Chen, Anpei and Xu, Zexiang and Wei, Xinyue and Tang, Siyu and Su, Hao and Geiger, Andreas},
journal={arXiv preprint arXiv:2302.01226},
year={2023}
}
@article{Chen2023SIGGRAPH, title={{Dictionary Fields: Learning a Neural Basis Decomposition}}, author={Anpei, Chen and Zexiang, Xu and Xinyue, Wei and Siyu, Tang and Hao, Su and Andreas, Geiger}, booktitle={International Conference on Computer Graphics and Interactive Techniques (SIGGRAPH)}, year={2023}}