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[ascl:2006.008] DeepSphere: Graph-based spherical convolutional neural network for cosmology

DeepSphere implements a generalization of Convolutional Neural Networks (CNNs) to the sphere. It models the discretized sphere as a graph of connected pixels. The resulting convolution is more efficient (especially when data doesn't span the whole sphere) and mostly equivariant to rotation (small distortions are due to the non-existence of a regular sampling of the sphere). The pooling strategy exploits a hierarchical pixelization of the sphere (HEALPix) to analyze the data at multiple scales. The graph neural network model is based on ChebNet and its TensorFlow implementation.

Code site:
https://github.com/deepsphere/DeepSphere
Described in:
https://ui.adsabs.harvard.edu/abs/2019A%26C....27..130P https://ui.adsabs.harvard.edu/abs/2019arXiv190405146D
Bibcode:
2020ascl.soft06008P

Views: 287

ascl:2006.008
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