no code implementations • 9 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.
no code implementations • 16 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.
1 code implementation • 15 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.
1 code implementation • 21 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.
no code implementations • 18 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.
1 code implementation • 6 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.