Search Results for author: Kunal N. Chaudhury

Found 7 papers, 4 papers with code

On the Contractivity of Plug-and-Play Operators

1 code implementation28 Sep 2023 Chirayu D. Athalye, Kunal N. Chaudhury, Bhartendu Kumar

The present work is motivated by the following questions: Can we relax the assumptions on the forward model?

Image Inpainting

Guided Nonlocal Patch Regularization and Efficient Filtering-Based Inversion for Multiband Fusion

no code implementations9 Oct 2022 Unni V. S., Pravin Nair, Kunal N. Chaudhury

In multiband fusion, an image with a high spatial and low spectral resolution is combined with an image with a low spatial but high spectral resolution to produce a single multiband image having high spatial and spectral resolutions.

Image Restoration Pansharpening

Plug-and-Play Regularization using Linear Solvers

no code implementations16 Sep 2022 Pravin Nair, Kunal N. Chaudhury

Coupled with a model-based loss function, these are typically used for image reconstruction within an optimization framework.

Deblurring Image Reconstruction

On Exact and Robust Recovery for Plug-and-Play Compressed Sensing

no code implementations26 Jul 2022 Ruturaj G. Gavaskar, Chirayu D. Athalye, Kunal N. Chaudhury

$Ax=A\xi$, where $A$ is a $m\times n$ random sensing matrix, $\Phi$ is the regularizer associated with a linear denoiser $W$, and $\xi$ is the ground-truth.

Averaged Deep Denoisers for Image Regularization

1 code implementation15 Jul 2022 Pravin Nair, Kunal N. Chaudhury

In this work, we construct contractive and averaged image denoisers by unfolding splitting-based optimization algorithms applied to wavelet denoising and demonstrate that their regularization capacity for PnP and RED can be matched with CNN denoisers.

Denoising Image Reconstruction

On Plug-and-Play Regularization using Linear Denoisers

1 code implementation11 May 2021 Ruturaj G. Gavaskar, Chirayu D. Athalye, Kunal N. Chaudhury

This is typically done by taking a proximal algorithm such as FISTA or ADMM, and formally replacing the proximal map associated with a regularizer by nonlocal means, BM3D or a CNN denoiser.

Fixed-Point and Objective Convergence of Plug-and-Play Algorithms

1 code implementation21 Apr 2021 Pravin Nair, Ruturaj G. Gavaskar, Kunal N. Chaudhury

A standard model for image reconstruction involves the minimization of a data-fidelity term along with a regularizer, where the optimization is performed using proximal algorithms such as ISTA and ADMM.

Image Reconstruction

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