Debating the potential of machine learning in astronomical surveys

The scattering transform in cosmology, or, a CNN without Training
Sihao Cheng  1@  , Brice Ménard  1  , Yuan-Sen Ting  2  , Joan Bruna  3  
1 : Johns Hopkins University
2 : Australian National University
3 : New York University

Patterns and non-Gaussian textures are ubiquitous in astronomical data but challenging to quantify. I will present a new powerful statistic, called the “scattering transform”. It borrows ideas from convolutional neural nets (CNNs) while retaining the advantages of traditional statistics. As an example, I will demonstrate its application to weak lensing cosmology, where it outperforms classic statistics and is on a par with CNNs. I will also show interesting interpretations of the scattering statistics. I argue that the scattering transform provides a powerful new approach in astrophysics and beyond.


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