A comparative study on multivariate mathematical morphology

E Aptoula, S Lefèvre - Pattern Recognition, 2007 - Elsevier
The successful application of univariate morphological operators on several domains, along
with the increasing need for processing the plethora of available multivalued images, have …

A second order nonsmooth variational model for restoring manifold-valued images

M Bacák, R Bergmann, G Steidl, A Weinmann - SIAM Journal on Scientific …, 2016 - SIAM
We introduce a new nonsmooth variational model for the restoration of manifold-valued data
which includes second order differences in the regularization term. While such models were …

PDE-based group equivariant convolutional neural networks

BMN Smets, J Portegies, EJ Bekkers… - Journal of Mathematical …, 2023 - Springer
We present a PDE-based framework that generalizes Group equivariant Convolutional
Neural Networks (G-CNNs). In this framework, a network layer is seen as a set of PDE …

A parallel Douglas–Rachford algorithm for minimizing ROF-like functionals on images with values in symmetric Hadamard manifolds

R Bergmann, J Persch, G Steidl - SIAM Journal on Imaging Sciences, 2016 - SIAM
We are interested in restoring images having values in a symmetric Hadamard manifold by
minimizing a functional with a quadratic data term and a total variation--like regularizing …

Median and related local filters for tensor-valued images

M Welk, J Weickert, F Becker, C Schnörr, C Feddern… - Signal Processing, 2007 - Elsevier
We develop a concept for the median filtering of tensor data. The main part of this concept is
the definition of median for symmetric matrices. This definition is based on the minimisation …

Bilateral filtering of diffusion tensor magnetic resonance images

G Hamarneh, J Hradsky - IEEE Transactions on Image …, 2007 - ieeexplore.ieee.org
We extend the well-known scalar image bilateral filtering technique to diffusion tensor
magnetic resonance images (DTMRI). The scalar version of bilateral image filtering is …

Curvature-driven PDE methods for matrix-valued images

C Feddern, J Weickert, B Burgeth, M Welk - International Journal of …, 2006 - Springer
Matrix-valued data sets arise in a number of applications including diffusion tensor magnetic
resonance imaging (DT-MRI) and physical measurements of anisotropic behaviour …

Morphology for matrix data: Ordering versus pde-based approach

B Burgeth, A Bruhn, S Didas, J Weickert… - Image and Vision …, 2007 - Elsevier
Matrix fields are becoming increasingly important in digital imaging. In order to perform
shape analysis, enhancement or segmentation of such matrix fields, appropriate image …

Vector-attribute filters

ER Urbach, NJ Boersma, MHF Wilkinson - Mathematical Morphology: 40 …, 2005 - Springer
A variant of morphological attribute filters is developed, in which the attribute on which
filtering is based, is no longer a scalar, as is usual, but a vector. This leads to new …

Photovoltaic module segmentation and thermal analysis tool from thermal images

LE Montanez, LM Valentín-Coronado… - … Autumn Meeting on …, 2020 - ieeexplore.ieee.org
The growing interest in the use of clean energy has led to the construction of increasingly
large photovoltaic systems. Consequently, monitoring the proper functioning of these …