There has been some interesting recent work [1] applying Fourier transforms (more precisely, an adaptation of the Fourier transform to the sphere) to CNNs, to a

There has been some interesting recent work [1] applying Fourier transforms (more precisely, an adaptation of the Fourier transform to the sphere) to CNNs, to automatically encode equivariance to rotational symmetries. [1] https://arxiv.org/abs/1711.06721 https://arxiv.org/abs/1711.06721