Search Results for author: Pravin Nair

Found 6 papers, 3 papers with code

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

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

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

Fast High-Dimensional Kernel Filtering

no code implementations18 Jan 2019 Pravin Nair, Kunal. N. Chaudhury

We demonstrate the effectiveness of our proposal for bilateral and nonlocal means filtering of color and hyperspectral images.

Vocal Bursts Intensity Prediction

Fast High-Dimensional Bilateral and Nonlocal Means Filtering

1 code implementation6 Nov 2018 Pravin Nair, Kunal. N. Chaudhury

Unlike existing approaches, where the focus is on approximating the data (using quantization) or the filter kernel (via analytic expansions), we locally approximate the kernel using weighted and shifted copies of a Gaussian, where the weights and shifts are inferred from the data.

Clustering Quantization +1

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