Reliable amortized variational inference with physics-based latent distribution correction

A Siahkoohi, G Rizzuti, R Orozco, FJ Herrmann - Geophysics, 2023 - library.seg.org
Bayesian inference for high-dimensional inverse problems is computationally costly and
requires selecting a suitable prior distribution. Amortized variational inference addresses …

A diffusion‐based uncertainty quantification method to advance E3SM land model calibration

D Lu, Y Liu, Z Zhang, F Bao… - Journal of Geophysical …, 2024 - Wiley Online Library
Calibrating land surface models and accurately quantifying their uncertainty are crucial for
improving the reliability of simulations of complex environmental processes. This, in turn …

AmbientFlow: Invertible generative models from incomplete, noisy measurements

VA Kelkar, R Deshpande, A Banerjee… - arXiv preprint arXiv …, 2023 - arxiv.org
Generative models have gained popularity for their potential applications in imaging
science, such as image reconstruction, posterior sampling and data sharing. Flow-based …

InvertibleNetworks. jl: A Julia package for scalable normalizing flows

R Orozco, P Witte, M Louboutin, A Siahkoohi… - arXiv preprint arXiv …, 2023 - arxiv.org
InvertibleNetworks. jl is a Julia package designed for the scalable implementation of
normalizing flows, a method for density estimation and sampling in high-dimensional …

Adjoint operators enable fast and amortized machine learning based Bayesian uncertainty quantification

R Orozco, A Siahkoohi, G Rizzuti… - Medical Imaging …, 2023 - spiedigitallibrary.org
In the context of machine learning for uncertainty quantification (UQ) of inverse problems: we
propose to first transform input observations using the adjoint. We demonstrate with two …

Funknn: Neural interpolation for functional generation

AE Khorashadizadeh, A Chaman, V Debarnot… - arXiv preprint arXiv …, 2022 - arxiv.org
Can we build continuous generative models which generalize across scales, can be
evaluated at any coordinate, admit calculation of exact derivatives, and are conceptually …

Loop Unrolled Shallow Equilibrium Regularizer (LUSER)--A Memory-Efficient Inverse Problem Solver

P Guan, J Jin, J Romberg, MA Davenport - arXiv preprint arXiv …, 2022 - arxiv.org
In inverse problems we aim to reconstruct some underlying signal of interest from potentially
corrupted and often ill-posed measurements. Classical optimization-based techniques …

Estimating uncertainty in pet image reconstruction via deep posterior sampling

T Vlašić, T Matulić, D Seršić - arXiv preprint arXiv:2306.04664, 2023 - arxiv.org
Positron emission tomography (PET) is an important functional medical imaging technique
often used in the evaluation of certain brain disorders, whose reconstruction problem is ill …

LoFi: Scalable Local Image Reconstruction with Implicit Neural Representation

AE Khorashadizadeh, TI Liaudat, T Liu… - arXiv preprint arXiv …, 2024 - arxiv.org
Neural fields or implicit neural representations (INRs) have attracted significant attention in
machine learning and signal processing due to their efficient continuous representation of …

Autoencoder-Augmented Machine-Learning-Based Uncertainty Quantification for Electromagnetic Imaging

K Narendra, B Martin, C Gilmore… - IEEE Transactions on …, 2023 - ieeexplore.ieee.org
Uncertainty quantification of machine learning (ML) predictions is of key importance for the
widespread adoption of ML-enabled electromagnetic imaging. As ML inference is a …