Simple-RF

Official code release accompanying the paper - "Simple-RF: Regularizing Sparse Input Radiance Fields with Simpler Solutions".

• Project Page
• Published Data (OneDrive)

Note

This repository contains the integrated code for Simple-NeRF and Simple-TensoRF. The code for Simple-ZipNeRF can be found at NagabhushanSN95/Simple-ZipNeRF.

Setup

Python Environment

Environment details are available in EnvironmentData/SimpleRF.yml. The environment can be created using conda

cd EnvironmentData/
conda env create -f SimpleRF.yml
conda activate SimpleRF
cd ..

Add the source directory to PYTHONPATH

export PYTHONPATH=<ABSOLUTE_PATH_TO_SIMPLERF_DIR>/src:$PYTHONPATH

Set-up Databases

Please follow the instructions in database_utils/README.md file to set up various databases. Instructions for custom databases are also included here.

Generate Priors

Sparse Depth Prior

Please follow the instructions in prior_generators/sparse_depth/README.md file to generate sparse depth prior.

Training and Inference

The files RealEstateTrainerTester01.py, NerfLlffTrainerTester01.py contain the code for training, testing and quality assessment along with the configs for the respective databases.

cd src/
python RealEstateTrainerTester08.py
python NerfLlffTrainerTester10.py
cd ../

Inference with Pre-trained Models

The train configs are also provided in runs/training/train**** folders for each of the scenes. Please download the trained models from runs/training directory in the published data (link available at the top) and place them in the appropriate folders. Disable the train call in the TrainerTester files and run the respective files. This will run inference using the pre-trained models and also evaluate the synthesized images and reports the performance.

Evaluation

Evaluation of the rendered images will be automatically done after rendering the images. To compute depth based metrics and masked metrics, ground truth depth maps are needed. We obtain (pseudo) ground truth depth maps by training the vanilla NeRF with dense input views. Download these depth maps and visibility masks (for masked metrics) from data directory in the published data (link available at the top) and place them in the appropriate folders.

If you want to regenerate visibility masks (for masked metrics), use visibility mask generators

cd src/qa/00_Common/src/mask_generators
python VisibilityMask01_RealEstate.py
python VisibilityMask02_NeRF_LLFF.py
cd ../../../../../

License

MIT License

Copyright (c) 2024 Nagabhushan Somraj, Sai Harsha Mupparaju, Adithyan Karanayil, Rajiv Soundararajan

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Citation

If you use this code for your research, please cite our paper

@article{somraj2024simplerf,
    title = {{Simple-RF}: Regularizing Sparse Input Radiance Fields with Simpler Solutions},
    author = {Somraj, Nagabhushan and Mupparaju, Sai Harsha and Karanayil, Adithyan and Soundararajan, Rajiv},
    journal = {arXiv: 2404.19015},
    month = {May},
    year = {2024},
    doi = {10.48550/arXiv.2404.19015},
}

If you use outputs/results of Simple-RF model in your publication, please specify the version as well. The current version is 1.0.

Acknowledgements

Our code is built on top of SimpleNeRF and TensoRF codebases.

For any queries or bugs regarding Simple-RF, please raise an issue.