This library contains a PyTorch implementation of the rotation equivariant CNNs for spherical signals (e.g. omnidirectional images, signals on the globe) as presented in [1]. Equivariant networks for the plane are available here.

• PyTorch: http://pytorch.org/ (>= 0.4.0)
• cupy: https://github.com/cupy/cupy
• lie_learn: https://github.com/AMLab-Amsterdam/lie_learn
• pynvrtc: https://github.com/NVIDIA/pynvrtc

(commands to install all the dependencies on a new conda environment)

conda create --name cuda9 python=3.6 
conda activate cuda9

# s2cnn deps
#conda install pytorch torchvision cuda90 -c pytorch # get correct command line at http://pytorch.org/
conda install -c anaconda cupy  
pip install pynvrtc  

# lie_learn deps
conda install -c anaconda cython  
conda install -c anaconda requests  

# shrec17 example dep
conda install -c anaconda scipy  
conda install -c conda-forge rtree shapely  
conda install -c conda-forge pyembree  
pip install "trimesh[easy]"  

To install, run

$ python setup.py install

Please have a look at the examples.

Please cite [1] in your work when using this library in your experiments.

For questions and comments, feel free to contact us: geiger.mario (gmail), taco.cohen (gmail), jonas (argmin.xyz).

MIT

[1] Taco S. Cohen, Mario Geiger, Jonas Köhler, Max Welling, Spherical CNNs. International Conference on Learning Representations (ICLR), 2018.

[2] Taco S. Cohen, Mario Geiger, Jonas Köhler, Max Welling, Convolutional Networks for Spherical Signals. ICML Workshop on Principled Approaches to Deep Learning, 2017.

[3] Taco S. Cohen, Mario Geiger, Maurice Weiler, Intertwiners between Induced Representations (with applications to the theory of equivariant neural networks), ArXiv preprint 1803.10743, 2018.