Search Results for author: Ajil Jalal

Found 18 papers, 11 papers with code

Optimizing Sampling Patterns for Compressed Sensing MRI with Diffusion Generative Models

1 code implementation5 Jun 2023 Sriram Ravula, Brett Levac, Ajil Jalal, Jonathan I. Tamir, Alexandros G. Dimakis

Diffusion-based generative models have been used as powerful priors for magnetic resonance imaging (MRI) reconstruction.

MRI Reconstruction

MRI Reconstruction with Side Information using Diffusion Models

no code implementations26 Mar 2023 Brett Levac, Ajil Jalal, Kannan Ramchandran, Jonathan I. Tamir

This leads to an improvement in image reconstruction fidelity over generative models that rely only on a marginal prior over the image contrast of interest.

Anatomy MRI Reconstruction

Accelerated Motion Correction with Deep Generative Diffusion Models

1 code implementation1 Nov 2022 Brett Levac, Sidharth Kumar, Ajil Jalal, Jonathan I. Tamir

In this work we propose a framework for jointly reconstructing highly sub-sampled MRI data while estimating patient motion using diffusion based generative models.

Image Reconstruction

Robust Compressed Sensing MR Imaging with Deep Generative Priors

no code implementations NeurIPS Workshop Deep_Invers 2021 Ajil Jalal, Marius Arvinte, Giannis Daras, Eric Price, Alex Dimakis, Jonathan Tamir

The CSGM framework (Bora-Jalal-Price-Dimakis'17) has shown that deep generative priors can be powerful tools for solving inverse problems.

Robust Compressed Sensing MRI with Deep Generative Priors

2 code implementations NeurIPS 2021 Ajil Jalal, Marius Arvinte, Giannis Daras, Eric Price, Alexandros G. Dimakis, Jonathan I. Tamir

The CSGM framework (Bora-Jalal-Price-Dimakis'17) has shown that deep generative priors can be powerful tools for solving inverse problems.

Fairness for Image Generation with Uncertain Sensitive Attributes

1 code implementation23 Jun 2021 Ajil Jalal, Sushrut Karmalkar, Jessica Hoffmann, Alexandros G. Dimakis, Eric Price

This motivates the introduction of definitions that allow algorithms to be \emph{oblivious} to the relevant groupings.

Fairness Image Generation +3

Instance-Optimal Compressed Sensing via Posterior Sampling

1 code implementation21 Jun 2021 Ajil Jalal, Sushrut Karmalkar, Alexandros G. Dimakis, Eric Price

We characterize the measurement complexity of compressed sensing of signals drawn from a known prior distribution, even when the support of the prior is the entire space (rather than, say, sparse vectors).

Intermediate Layer Optimization for Inverse Problems using Deep Generative Models

2 code implementations15 Feb 2021 Giannis Daras, Joseph Dean, Ajil Jalal, Alexandros G. Dimakis

We propose Intermediate Layer Optimization (ILO), a novel optimization algorithm for solving inverse problems with deep generative models.

Denoising Super-Resolution

Compressed Sensing with Approximate Priors via Conditional Resampling

no code implementations23 Oct 2020 Ajil Jalal, Sushrut Karmalkar, Alex Dimakis, Eric Price

We characterize the measurement complexity of compressed sensing of signals drawn from a known prior distribution, even when the support of the prior is the entire space (rather than, say, sparse vectors).

High Dimensional Channel Estimation Using Deep Generative Networks

no code implementations24 Jun 2020 Eren Balevi, Akash Doshi, Ajil Jalal, Alexandros Dimakis, Jeffrey G. Andrews

This paper presents a novel compressed sensing (CS) approach to high dimensional wireless channel estimation by optimizing the input to a deep generative network.

Vocal Bursts Intensity Prediction

Robust Compressed Sensing using Generative Models

1 code implementation NeurIPS 2020 Ajil Jalal, Liu Liu, Alexandros G. Dimakis, Constantine Caramanis

In analogy to classical compressed sensing, here we assume a generative model as a prior, that is, we assume the vector is represented by a deep generative model $G: \mathbb{R}^k \rightarrow \mathbb{R}^n$.

Deep Learning Techniques for Inverse Problems in Imaging

no code implementations12 May 2020 Gregory Ongie, Ajil Jalal, Christopher A. Metzler, Richard G. Baraniuk, Alexandros G. Dimakis, Rebecca Willett

Recent work in machine learning shows that deep neural networks can be used to solve a wide variety of inverse problems arising in computational imaging.

Inverting Deep Generative models, One layer at a time

1 code implementation NeurIPS 2019 Qi Lei, Ajil Jalal, Inderjit S. Dhillon, Alexandros G. Dimakis

For generative models of arbitrary depth, we show that exact recovery is possible in polynomial time with high probability, if the layers are expanding and the weights are randomly selected.

Compressed Sensing with Deep Image Prior and Learned Regularization

1 code implementation17 Jun 2018 Dave Van Veen, Ajil Jalal, Mahdi Soltanolkotabi, Eric Price, Sriram Vishwanath, Alexandros G. Dimakis

We propose a novel method for compressed sensing recovery using untrained deep generative models.

The Robust Manifold Defense: Adversarial Training using Generative Models

1 code implementation26 Dec 2017 Ajil Jalal, Andrew Ilyas, Constantinos Daskalakis, Alexandros G. Dimakis

Our formulation involves solving a min-max problem, where the min player sets the parameters of the classifier and the max player is running our attack, and is thus searching for adversarial examples in the {\em low-dimensional} input space of the spanner.

Compressed Sensing using Generative Models

3 code implementations ICML 2017 Ashish Bora, Ajil Jalal, Eric Price, Alexandros G. Dimakis

The goal of compressed sensing is to estimate a vector from an underdetermined system of noisy linear measurements, by making use of prior knowledge on the structure of vectors in the relevant domain.

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