Search Results for author: Ruturaj G. Gavaskar

Found 6 papers, 4 papers with code

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.

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

Plug-and-play ISTA converges with kernel denoisers

1 code implementation7 Apr 2020 Ruturaj G. Gavaskar, Kunal. N. Chaudhury

Plug-and-play (PnP) method is a recent paradigm for image regularization, where the proximal operator (associated with some given regularizer) in an iterative algorithm is replaced with a powerful denoiser.

Deblurring Denoising

On the Proof of Fixed-Point Convergence for Plug-and-Play ADMM

no code implementations31 Oct 2019 Ruturaj G. Gavaskar, Kunal. N. Chaudhury

We argue that the original proof is incomplete, since convergence is not analyzed for one of the three possible cases outlined in the paper.

Image Restoration

Fast Adaptive Bilateral Filtering

1 code implementation6 Nov 2018 Ruturaj G. Gavaskar, Kunal. N. Chaudhury

In the classical bilateral filter, a fixed Gaussian range kernel is used along with a spatial kernel for edge-preserving smoothing.

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