1 code implementation • 2 Sep 2024 • Riccardo Taiello, Sergen Cansiz, Marc Vesin, Francesco Cremonesi, Lucia Innocenti, Melek Önen, Marco Lorenzi
Deploying federated learning (FL) in real-world scenarios, particularly in healthcare, poses challenges in communication and security.
no code implementations • 29 Sep 2023 • Lucia Innocenti, Michela Antonelli, Francesco Cremonesi, Kenaan Sarhan, Alejandro Granados, Vicky Goh, Sebastien Ourselin, Marco Lorenzi
To the best of our knowledge, this is the first work in which CBM, such as label fusion techniques, are used to solve a problem of collaborative learning.
no code implementations • 13 Sep 2023 • Andre Altmann, Ana C Lawry Aguila, Neda Jahanshad, Paul M Thompson, Marco Lorenzi
The standard approach in the area are mass univariate analyses across genetic factors and imaging phenotypes.
1 code implementation • 5 Jun 2023 • Etrit Haxholli, Marco Lorenzi
The study of loss function distributions is critical to characterize a model's behaviour on a given machine learning problem.
no code implementations • 5 Jun 2023 • Etrit Haxholli, Marco Lorenzi
Furthermore, we derive the Jacobian determinant of the general augmented form by generalizing the chain rule in the continuous sense into the Cable Rule, which expresses the forward sensitivity of ODEs with respect to their initial conditions.
no code implementations • 5 Jun 2023 • Etrit Haxholli, Marco Lorenzi
In Diffusion Probabilistic Models (DPMs), the task of modeling the score evolution via a single time-dependent neural network necessitates extended training periods and may potentially impede modeling flexibility and capacity.
1 code implementation • 24 Apr 2023 • Francesco Cremonesi, Marc Vesin, Sergen Cansiz, Yannick Bouillard, Irene Balelli, Lucia Innocenti, Santiago Silva, Samy-Safwan Ayed, Riccardo Taiello, Laetita Kameni, Richard Vidal, Fanny Orlhac, Christophe Nioche, Nathan Lapel, Bastien Houis, Romain Modzelewski, Olivier Humbert, Melek Önen, Marco Lorenzi
The real-world implementation of federated learning is complex and requires research and development actions at the crossroad between different domains ranging from data science, to software programming, networking, and security.
no code implementations • 17 Apr 2023 • Irene Balelli, Aude Sportisse, Francesco Cremonesi, Pierre-Alexandre Mattei, Marco Lorenzi
In addition, thanks to the variational nature of Fed-MIWAE, our method is designed to perform multiple imputation, allowing for the quantification of the imputation uncertainty in the federated scenario.
1 code implementation • 21 Nov 2022 • Yann Fraboni, Martin Van Waerebeke, Kevin Scaman, Richard Vidal, Laetitia Kameni, Marco Lorenzi
Machine Unlearning (MU) is an increasingly important topic in machine learning safety, aiming at removing the contribution of a given data point from a training procedure.
1 code implementation • 10 Oct 2022 • Jean Ogier du Terrail, Samy-Safwan Ayed, Edwige Cyffers, Felix Grimberg, Chaoyang He, Regis Loeb, Paul Mangold, Tanguy Marchand, Othmane Marfoq, Erum Mushtaq, Boris Muzellec, Constantin Philippenko, Santiago Silva, Maria Teleńczuk, Shadi Albarqouni, Salman Avestimehr, Aurélien Bellet, Aymeric Dieuleveut, Martin Jaggi, Sai Praneeth Karimireddy, Marco Lorenzi, Giovanni Neglia, Marc Tommasi, Mathieu Andreux
In this work, we propose a novel cross-silo dataset suite focused on healthcare, FLamby (Federated Learning AMple Benchmark of Your cross-silo strategies), to bridge the gap between theory and practice of cross-silo FL.
no code implementations • 21 Jun 2022 • Yann Fraboni, Richard Vidal, Laetitia Kameni, Marco Lorenzi
We show that our general framework applies to existing optimization schemes including centralized learning, FedAvg, asynchronous FedAvg, and FedBuff.
2 code implementations • 17 May 2022 • Riccardo Taiello, Melek Önen, Francesco Capano, Olivier Humbert, Marco Lorenzi
Image registration is a key task in medical imaging applications, allowing to represent medical images in a common spatial reference frame.
Ranked #1 on Cubic splines Image Registration on ADNI
Affine Image Registration Cubic splines Image Registration +2
no code implementations • 15 Apr 2022 • Irene Balelli, Santiago Silva, Marco Lorenzi
Our method is expressed through a hierarchical Bayesian latent variable model, where client-specific parameters are assumed to be realization from a global distribution at the master level, which is in turn estimated to account for data bias and variability across clients.
1 code implementation • 26 Jul 2021 • Yann Fraboni, Richard Vidal, Laetitia Kameni, Marco Lorenzi
In this work, we provide a general theoretical framework to quantify the impact of a client sampling scheme and of the clients heterogeneity on the federated optimization.
1 code implementation • 12 May 2021 • Yann Fraboni, Richard Vidal, Laetitia Kameni, Marco Lorenzi
This work addresses the problem of optimizing communications between server and clients in federated learning (FL).
1 code implementation • 30 Apr 2021 • Adrià Casamitjana, Marco Lorenzi, Sebastiano Ferraris, Loc Peter, Marc Modat, Allison Stevens, Bruce Fischl, Tom Vercauteren, Juan Eugenio Iglesias
The model relies on a spanning tree of latent transforms connecting all the sections and slices of the reference volume, and assumes that the registration between any pair of images can be see as a noisy version of the composition of (possibly inverted) latent transforms connecting the two images.
1 code implementation • 22 Jan 2021 • Vien Ngoc Dang, Francesco Galati, Rosa Cortese, Giuseppe Di Giacomo, Viola Marconetto, Prateek Mathur, Karim Lekadir, Marco Lorenzi, Ferran Prados, Maria A. Zuluaga
First, deep learning techniques tend to show poor performances at the segmentation of relatively small objects compared to the size of the full image.
no code implementations • 2 Oct 2020 • Jaume Banus, Maxime Sermesant, Oscar Camara, Marco Lorenzi
To tackle this problem we introduce a probabilistic framework for joint cardiac data imputation and personalisation of cardiovascular mechanistic models, with application to brain studies with incomplete heart data.
1 code implementation • 21 Jun 2020 • Yann Fraboni, Richard Vidal, Marco Lorenzi
Free-rider attacks against federated learning consist in dissimulating participation to the federated learning process with the goal of obtaining the final aggregated model without actually contributing with any data.
no code implementations • 23 May 2019 • Raphaël Sivera, Hervé Delingette, Marco Lorenzi, Xavier Pennec, Nicholas Ayache
In this study we propose a deformation-based framework to jointly model the influence of aging and Alzheimer's disease (AD) on the brain morphological evolution.
no code implementations • 28 Feb 2019 • Clement Abi Nader, Nicholas Ayache, Philippe Robert, Marco Lorenzi
We introduce a probabilistic generative model for disentangling spatio-temporal disease trajectories from series of high-dimensional brain images.
2 code implementations • 18 Jan 2019 • Sara Garbarino, Marco Lorenzi
Models of misfolded proteins (MP) aim at discovering the bio-mechanical propagation properties of neurological diseases (ND) by identifying plausible associated dynamical systems.
2 code implementations • 11 Jan 2019 • Razvan V. Marinescu, Marco Lorenzi, Stefano B. Blumberg, Alexandra L. Young, Pere P. Morell, Neil P. Oxtoby, Arman Eshaghi, Keir X. Yong, Sebastian J. Crutch, Polina Golland, Daniel C. Alexander
DKT infers robust multimodal biomarker trajectories in rare neurodegenerative diseases even when only limited, unimodal data is available, by transferring information from larger multimodal datasets from common neurodegenerative diseases.
1 code implementation • 11 Jan 2019 • Razvan V. Marinescu, Arman Eshaghi, Marco Lorenzi, Alexandra L. Young, Neil P. Oxtoby, Sara Garbarino, Sebastian J. Crutch, Daniel C. Alexander
Here we present DIVE: Data-driven Inference of Vertexwise Evolution.
no code implementations • 19 Oct 2018 • Santiago Silva, Boris Gutman, Eduardo Romero, Paul M. Thompson, Andre Altmann, Marco Lorenzi
At this moment, databanks worldwide contain brain images of previously unimaginable numbers.
no code implementations • ICML 2018 • Marco Lorenzi, Maurizio Filippone
We introduce a novel generative formulation of deep probabilistic models implementing "soft" constraints on their function dynamics.