Structure tensor total variation

S Lefkimmiatis, A Roussos, P Maragos, M Unser - SIAM Journal on Imaging …, 2015 - SIAM
We introduce a novel generic energy functional that we employ to solve inverse imaging
problems within a variational framework. The proposed regularization family, termed as …

Non-local Retinex---A unifying framework and beyond

D Zosso, G Tran, SJ Osher - SIAM Journal on Imaging Sciences, 2015 - SIAM
In this paper, we provide a short review of Retinex and then present a unifying framework.
The fundamental assumption of all Retinex models is that the observed image is a …

Collaborative total variation: A general framework for vectorial TV models

J Duran, M Moeller, C Sbert, D Cremers - SIAM Journal on Imaging Sciences, 2016 - SIAM
Even after two decades, the total variation (TV) remains one of the most popular
regularizations for image processing problems and has sparked a tremendous amount of …

On and beyond total variation regularization in imaging: The role of space variance

M Pragliola, L Calatroni, A Lanza, F Sgallari - SIAM Review, 2023 - SIAM
Over the last 30 years a plethora of variational regularization models for image
reconstruction have been proposed and thoroughly inspected by the applied mathematics …

Adaptive regularization with the structure tensor

V Estellers, S Soatto, X Bresson - IEEE Transactions on Image …, 2015 - ieeexplore.ieee.org
Natural images exhibit geometric structures that are informative of the properties of the
underlying scene. Modern image processing algorithms respect such characteristics by …

Convex generalizations of total variation based on the structure tensor with applications to inverse problems

S Lefkimmiatis, A Roussos, M Unser… - … Conference on Scale …, 2013 - Springer
We introduce a generic convex energy functional that is suitable for both grayscale and
vector-valued images. Our functional is based on the eigenvalues of the structure tensor …

Image regularizations based on the sparsity of corner points

H Liu, S Tan - IEEE Transactions on Image Processing, 2018 - ieeexplore.ieee.org
Many analysis-based regularizations proposed so far employ a common prior information,
ie, edges in an image are sparse. However, in local edge regions and texture regions, this …

A flexible space-variant anisotropic regularization for image restoration with automated parameter selection

L Calatroni, A Lanza, M Pragliola, F Sgallari - SIAM Journal on Imaging …, 2019 - SIAM
We propose a new space-variant anisotropic regularization term for variational image
restoration, based on the statistical assumption that the gradients of the target image …

A color elastica model for vector-valued image regularization

H Liu, XC Tai, R Kimmel, R Glowinski - SIAM Journal on Imaging Sciences, 2021 - SIAM
Models related to the Euler's elastica energy have proven to be useful for many applications
including image processing. Extending elastica models to color images and multichannel …

Elastica models for color image regularization

H Liu, XC Tai, R Kimmel, R Glowinski - SIAM Journal on Imaging Sciences, 2023 - SIAM
The choice of a proper regularization measure plays an important role in the field of image
processing. One classical approach treats color images as two-dimensional surfaces …