Search Results for author: Pietro Barbiero

Found 27 papers, 20 papers with code

Digital Histopathology with Graph Neural Networks: Concepts and Explanations for Clinicians

no code implementations4 Dec 2023 Alessandro Farace di Villaforesta, Lucie Charlotte Magister, Pietro Barbiero, Pietro Liò

To address the challenge of the ``black-box" nature of deep learning in medical settings, we combine GCExplainer - an automated concept discovery solution - along with Logic Explained Networks to provide global explanations for Graph Neural Networks.

graph construction Panoptic Segmentation

Everybody Needs a Little HELP: Explaining Graphs via Hierarchical Concepts

1 code implementation25 Nov 2023 Jonas Jürß, Lucie Charlotte Magister, Pietro Barbiero, Pietro Liò, Nikola Simidjievski

A line of interpretable methods approach this by discovering a small set of relevant concepts as subgraphs in the last GNN layer that together explain the prediction.

Drug Discovery Travel Time Estimation

From Charts to Atlas: Merging Latent Spaces into One

no code implementations11 Nov 2023 Donato Crisostomi, Irene Cannistraci, Luca Moschella, Pietro Barbiero, Marco Ciccone, Pietro Liò, Emanuele Rodolà

Models trained on semantically related datasets and tasks exhibit comparable inter-sample relations within their latent spaces.

Relational Concept Based Models

no code implementations23 Aug 2023 Pietro Barbiero, Francesco Giannini, Gabriele Ciravegna, Michelangelo Diligenti, Giuseppe Marra

The design of interpretable deep learning models working in relational domains poses an open challenge: interpretable deep learning methods, such as Concept-Based Models (CBMs), are not designed to solve relational problems, while relational models are not as interpretable as CBMs.

Image Classification Knowledge Graphs +1

SHARCS: Shared Concept Space for Explainable Multimodal Learning

1 code implementation1 Jul 2023 Gabriele Dominici, Pietro Barbiero, Lucie Charlotte Magister, Pietro Liò, Nikola Simidjievski

Multimodal learning is an essential paradigm for addressing complex real-world problems, where individual data modalities are typically insufficient to accurately solve a given modelling task.

Retrieval

GCI: A (G)raph (C)oncept (I)nterpretation Framework

1 code implementation9 Feb 2023 Dmitry Kazhdan, Botty Dimanov, Lucie Charlotte Magister, Pietro Barbiero, Mateja Jamnik, Pietro Lio

Explainable AI (XAI) underwent a recent surge in research on concept extraction, focusing on extracting human-interpretable concepts from Deep Neural Networks.

Explainable Artificial Intelligence (XAI) Molecular Property Prediction +1

Towards Robust Metrics for Concept Representation Evaluation

1 code implementation25 Jan 2023 Mateo Espinosa Zarlenga, Pietro Barbiero, Zohreh Shams, Dmitry Kazhdan, Umang Bhatt, Adrian Weller, Mateja Jamnik

In this paper, we show that such metrics are not appropriate for concept learning and propose novel metrics for evaluating the purity of concept representations in both approaches.

Benchmarking Disentanglement

Extending Logic Explained Networks to Text Classification

1 code implementation4 Nov 2022 Rishabh Jain, Gabriele Ciravegna, Pietro Barbiero, Francesco Giannini, Davide Buffelli, Pietro Lio

Recently, Logic Explained Networks (LENs) have been proposed as explainable-by-design neural models providing logic explanations for their predictions.

text-classification Text Classification

Global Explainability of GNNs via Logic Combination of Learned Concepts

1 code implementation13 Oct 2022 Steve Azzolin, Antonio Longa, Pietro Barbiero, Pietro Liò, Andrea Passerini

While instance-level explanation of GNN is a well-studied problem with plenty of approaches being developed, providing a global explanation for the behaviour of a GNN is much less explored, despite its potential in interpretability and debugging.

Global Concept-Based Interpretability for Graph Neural Networks via Neuron Analysis

1 code implementation22 Aug 2022 Han Xuanyuan, Pietro Barbiero, Dobrik Georgiev, Lucie Charlotte Magister, Pietro Lió

We propose a novel approach for producing global explanations for GNNs using neuron-level concepts to enable practitioners to have a high-level view of the model.

On The Quality Assurance Of Concept-Based Representations

no code implementations29 Sep 2021 Mateo Espinosa Zarlenga, Pietro Barbiero, Zohreh Shams, Dmitry Kazhdan, Umang Bhatt, Mateja Jamnik

Recent work on Explainable AI has focused on concept-based explanations, where deep learning models are explained in terms of high-level units of information, referred to as concepts.

Disentanglement

Logic Explained Networks

1 code implementation11 Aug 2021 Gabriele Ciravegna, Pietro Barbiero, Francesco Giannini, Marco Gori, Pietro Lió, Marco Maggini, Stefano Melacci

The language used to communicate the explanations must be formal enough to be implementable in a machine and friendly enough to be understandable by a wide audience.

Explainable artificial intelligence

Algorithmic Concept-based Explainable Reasoning

1 code implementation15 Jul 2021 Dobrik Georgiev, Pietro Barbiero, Dmitry Kazhdan, Petar Veličković, Pietro Liò

Recent research on graph neural network (GNN) models successfully applied GNNs to classical graph algorithms and combinatorial optimisation problems.

Entropy-based Logic Explanations of Neural Networks

3 code implementations12 Jun 2021 Pietro Barbiero, Gabriele Ciravegna, Francesco Giannini, Pietro Lió, Marco Gori, Stefano Melacci

Explainable artificial intelligence has rapidly emerged since lawmakers have started requiring interpretable models for safety-critical domains.

Explainable artificial intelligence Image Classification

Graph representation forecasting of patient's medical conditions: towards a digital twin

1 code implementation17 Sep 2020 Pietro Barbiero, Ramon Viñas Torné, Pietro Lió

Objective: Modern medicine needs to shift from a wait and react, curative discipline to a preventative, interdisciplinary science aiming at providing personalised, systemic and precise treatment plans to patients.

Generative Adversarial Network

Gradient-based Competitive Learning: Theory

no code implementations6 Sep 2020 Giansalvo Cirrincione, Pietro Barbiero, Gabriele Ciravegna, Vincenzo Randazzo

The former is just an adaptation of a standard competitive layer for deep clustering, while the latter is trained on the transposed matrix.

Clustering Deep Clustering +1

Topological Gradient-based Competitive Learning

1 code implementation21 Aug 2020 Pietro Barbiero, Gabriele Ciravegna, Vincenzo Randazzo, Giansalvo Cirrincione

The aim of this work is to present a novel comprehensive theory aspiring at bridging competitive learning with gradient-based learning, thus allowing the use of extremely powerful deep neural networks for feature extraction and projection combined with the remarkable flexibility and expressiveness of competitive learning.

Clustering Deep Clustering

Modeling Generalization in Machine Learning: A Methodological and Computational Study

1 code implementation28 Jun 2020 Pietro Barbiero, Giovanni Squillero, Alberto Tonda

As machine learning becomes more and more available to the general public, theoretical questions are turning into pressing practical issues.

BIG-bench Machine Learning

A Novel Outlook on Feature Selection as a Multi-objective Problem

1 code implementation Artificial Evolution 2020 Pietro Barbiero, Evelyne Lutton, Giovanni Squillero, Alberto Tonda

We thus propose a multi-objective optimization approach to feature selection, EvoFS, with the objectives to i. minimize feature subset size, ii.

feature selection

Uncovering Coresets for Classification With Multi-Objective Evolutionary Algorithms

1 code implementation20 Feb 2020 Pietro Barbiero, Giovanni Squillero, Alberto Tonda

A coreset is a subset of the training set, using which a machine learning algorithm obtains performances similar to what it would deliver if trained over the whole original data.

Classification Core set discovery +2

The GH-EXIN neural network for hierarchical clustering

1 code implementation Neural Networks 2020 Giansalvo Cirrincione, Gabriele Ciravegna, Pietro Barbiero, Vincenzo Randazzo, Eros Pasero

Furthermore, an important and very promising application of GH-EXIN in two-way hierarchical clustering, for the analysis of gene expression data in the study of the colorectal cancer is described.

Clustering Self-Organized Clustering

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