@conference {68678,
	title = {FourierNets enable the design of highly non-local optical encoders for computational imaging},
	booktitle = {Advances in Neural Information Processing Systems},
	year = {2022},
	month = {10/2022},
	abstract = {<p>Differentiable simulations of optical systems can be combined with deep learning-based reconstruction networks to enable high performance computational imaging via end-to-end (E2E) optimization of both the optical encoder and the deep decoder. This has enabled imaging applications such as 3D localization microscopy, depth estimation, and lensless photography via the optimization of local optical encoders. More challenging computational imaging applications, such as 3D snapshot microscopy which compresses 3D volumes into single 2D images, require a highly non-local optical encoder. We show that existing deep network decoders have a locality bias which prevents the optimization of such highly non-local optical encoders. We address this with a decoder based on a shallow neural network architecture using global kernel Fourier convolutional neural networks (FourierNets). We show that FourierNets surpass existing deep network based decoders at reconstructing photographs captured by the highly non-local DiffuserCam optical encoder. Further, we show that FourierNets enable E2E optimization of highly non-local optical encoders for 3D snapshot microscopy. By combining FourierNets with a large-scale multi-GPU differentiable optical simulation, we are able to optimize non-local optical encoders 170{\texttimes}\&nbsp;to 7372{\texttimes}\&nbsp;larger than prior state of the art, and demonstrate the potential for ROI-type specific optical encoding with a programmable microscope.</p>
},
	keywords = {Computer Vision and Pattern Recognition (cs.CV), electronic engineering, FOS: Computer and information sciences, FOS: Electrical engineering, Image and Video Processing (eess.IV), information engineering, Machine Learning (cs.LG)},
	doi = {https://doi.org/10.48550/arXiv.2104.10611},
	url = {https://openreview.net/forum?id=Kx1VCs1treH},
	author = {Diptodip Deb and Zhenfei Jiao and Ruth R Sims and Alex Bo-Yuan Chen and Michael Broxton and Misha Ahrens and Kaspar Podgorski and Srinivas C Turaga},
	editor = {Alice H. Oh and Alekh Agarwal and Danielle Belgrave and Kyunghyun Cho}
}
