no code implementations • 2 Dec 2024 • Ivan DeAndres-Tame, Ruben Tolosana, Pietro Melzi, Ruben Vera-Rodriguez, Minchul Kim, Christian Rathgeb, Xiaoming Liu, Luis F. Gomez, Aythami Morales, Julian Fierrez, Javier Ortega-Garcia, Zhizhou Zhong, Yuge Huang, Yuxi Mi, Shouhong Ding, Shuigeng Zhou, Shuai He, Lingzhi Fu, Heng Cong, Rongyu Zhang, Zhihong Xiao, Evgeny Smirnov, Anton Pimenov, Aleksei Grigorev, Denis Timoshenko, Kaleb Mesfin Asfaw, Cheng Yaw Low, Hao liu, Chuyi Wang, Qing Zuo, Zhixiang He, Hatef Otroshi Shahreza, Anjith George, Alexander Unnervik, Parsa Rahimi, Sébastien Marcel, Pedro C. Neto, Marco Huber, Jan Niklas Kolf, Naser Damer, Fadi Boutros, Jaime S. Cardoso, Ana F. Sequeira, Andrea Atzori, Gianni Fenu, Mirko Marras, Vitomir Štruc, Jiang Yu, Zhangjie Li, Jichun Li, Weisong Zhao, Zhen Lei, Xiangyu Zhu, Xiao-Yu Zhang, Bernardo Biesseck, Pedro Vidal, Luiz Coelho, Roger Granada, David Menotti
In order to promote the proposal of novel Generative AI methods and synthetic data, and investigate the application of synthetic data to better train face recognition systems, we introduce the 2nd FRCSyn-onGoing challenge, based on the 2nd Face Recognition Challenge in the Era of Synthetic Data (FRCSyn), originally launched at CVPR 2024.
no code implementations • 20 Nov 2024 • Salvatore Mario Carta, Stefano Chessa, Giulia Contu, Andrea Corriga, Andrea Deidda, Gianni Fenu, Luca Frigau, Alessandro Giuliani, Luca Grassi, Marco Manolo Manca, Mirko Marras, Francesco Mola, Bastianino Mossa, Piergiorgio Mura, Marco Ortu, Leonardo Piano, Simone Pisano, Alessia Pisu, Alessandro Sebastian Podda, Livio Pompianu, Simone Seu, Sandro Gabriele Tiddia
Minority languages are vital to preserving cultural heritage, yet they face growing risks of extinction due to limited digital resources and the dominance of artificial intelligence models trained on high-resource languages.
no code implementations • 6 Sep 2024 • Daniele Malitesta, Giacomo Medda, Erasmo Purificato, Ludovico Boratto, Fragkiskos D. Malliaros, Mirko Marras, Ernesto William De Luca
Diffusion-based recommender systems have recently proven to outperform traditional generative recommendation approaches, such as variational autoencoders and generative adversarial networks.
no code implementations • 4 Sep 2024 • Andrea Atzori, Pietro Cosseddu, Gianni Fenu, Mirko Marras
Over the recent years, the advancements in deep face recognition have fueled an increasing demand for large and diverse datasets.
no code implementations • 28 Aug 2024 • Sondos Mohamed, Walter Zimmer, Ross Greer, Ahmed Alaaeldin Ghita, Modesto Castrillón-Santana, Mohan Trivedi, Alois Knoll, Salvatore Mario Carta, Mirko Marras
Accurately detecting 3D objects from monocular images in dynamic roadside scenarios remains a challenging problem due to varying camera perspectives and unpredictable scene conditions.
1 code implementation • 22 Aug 2024 • Ludovico Boratto, Francesco Fabbri, Gianni Fenu, Mirko Marras, Giacomo Medda
Despite emerging regulations addressing fairness of automated systems, unfairness issues in graph collaborative filtering remain underexplored, especially from the consumer's perspective.
2 code implementations • 16 Apr 2024 • Ivan DeAndres-Tame, Ruben Tolosana, Pietro Melzi, Ruben Vera-Rodriguez, Minchul Kim, Christian Rathgeb, Xiaoming Liu, Aythami Morales, Julian Fierrez, Javier Ortega-Garcia, Zhizhou Zhong, Yuge Huang, Yuxi Mi, Shouhong Ding, Shuigeng Zhou, Shuai He, Lingzhi Fu, Heng Cong, Rongyu Zhang, Zhihong Xiao, Evgeny Smirnov, Anton Pimenov, Aleksei Grigorev, Denis Timoshenko, Kaleb Mesfin Asfaw, Cheng Yaw Low, Hao liu, Chuyi Wang, Qing Zuo, Zhixiang He, Hatef Otroshi Shahreza, Anjith George, Alexander Unnervik, Parsa Rahimi, Sébastien Marcel, Pedro C. Neto, Marco Huber, Jan Niklas Kolf, Naser Damer, Fadi Boutros, Jaime S. Cardoso, Ana F. Sequeira, Andrea Atzori, Gianni Fenu, Mirko Marras, Vitomir Štruc, Jiang Yu, Zhangjie Li, Jichun Li, Weisong Zhao, Zhen Lei, Xiangyu Zhu, Xiao-Yu Zhang, Bernardo Biesseck, Pedro Vidal, Luiz Coelho, Roger Granada, David Menotti
Synthetic data is gaining increasing relevance for training machine learning models.
no code implementations • 4 Apr 2024 • Andrea Atzori, Fadi Boutros, Naser Damer, Gianni Fenu, Mirko Marras
Finally, we assessed the effectiveness of data augmentation approaches on synthetic and authentic data, with the same goal in mind.
1 code implementation • 24 Jan 2024 • Ludovico Boratto, Francesco Fabbri, Gianni Fenu, Mirko Marras, Giacomo Medda
Efforts in the recommendation community are shifting from the sole emphasis on utility to considering beyond-utility factors, such as fairness and robustness.
1 code implementation • 24 Jan 2024 • Ludovico Boratto, Giulia Cerniglia, Mirko Marras, Alessandra Perniciano, Barbara Pes
When devising recommendation services, it is important to account for the interests of all content providers, encompassing not only newcomers but also minority demographic groups.
2 code implementations • 17 Nov 2023 • Pietro Melzi, Ruben Tolosana, Ruben Vera-Rodriguez, Minchul Kim, Christian Rathgeb, Xiaoming Liu, Ivan DeAndres-Tame, Aythami Morales, Julian Fierrez, Javier Ortega-Garcia, Weisong Zhao, Xiangyu Zhu, Zheyu Yan, Xiao-Yu Zhang, Jinlin Wu, Zhen Lei, Suvidha Tripathi, Mahak Kothari, Md Haider Zama, Debayan Deb, Bernardo Biesseck, Pedro Vidal, Roger Granada, Guilherme Fickel, Gustavo Führ, David Menotti, Alexander Unnervik, Anjith George, Christophe Ecabert, Hatef Otroshi Shahreza, Parsa Rahimi, Sébastien Marcel, Ioannis Sarridis, Christos Koutlis, Georgia Baltsou, Symeon Papadopoulos, Christos Diou, Nicolò Di Domenico, Guido Borghi, Lorenzo Pellegrini, Enrique Mas-Candela, Ángela Sánchez-Pérez, Andrea Atzori, Fadi Boutros, Naser Damer, Gianni Fenu, Mirko Marras
Despite the widespread adoption of face recognition technology around the world, and its remarkable performance on current benchmarks, there are still several challenges that must be covered in more detail.
no code implementations • 25 Oct 2023 • Giacomo Balloccu, Ludovico Boratto, Christian Cancedda, Gianni Fenu, Mirko Marras
This mechanism ensures zero incidence of corrupted paths by enforcing adherence to valid KG connections at the decoding level, agnostic of the underlying model architecture.
1 code implementation • 23 Aug 2023 • Ludovico Boratto, Francesco Fabbri, Gianni Fenu, Mirko Marras, Giacomo Medda
In recommendation literature, explainability and fairness are becoming two prominent perspectives to consider.
no code implementations • 22 Aug 2023 • Andrea Atzori, Gianni Fenu, Mirko Marras
Law enforcement regularly faces the challenge of ranking suspects from their facial images.
1 code implementation • 12 Apr 2023 • Giacomo Medda, Francesco Fabbri, Mirko Marras, Ludovico Boratto, Gianni Fenu
Moreover, an empirical evaluation of the perturbed network uncovered relevant patterns that justify the nature of the unfairness discovered by the generated explanations.
1 code implementation • 14 Jan 2023 • Giacomo Balloccu, Ludovico Boratto, Christian Cancedda, Gianni Fenu, Mirko Marras
Path reasoning is a notable recommendation approach that models high-order user-product relations, based on a Knowledge Graph (KG).
1 code implementation • 17 Dec 2022 • Vinitra Swamy, Sijia Du, Mirko Marras, Tanja Käser
Deep learning models for learning analytics have become increasingly popular over the last few years; however, these approaches are still not widely adopted in real-world settings, likely due to a lack of trust and transparency.
no code implementations • 16 Dec 2022 • Roberta Galici, Tanja Käser, Gianni Fenu, Mirko Marras
This weakness is one of the main factors undermining users' trust, since model predictions could for instance lead an instructor to not intervene on a student in need.
1 code implementation • 2 Dec 2022 • Mohammad Asadi, Vinitra Swamy, Jibril Frej, Julien Vignoud, Mirko Marras, Tanja Käser
Time series is the most prevalent form of input data for educational prediction tasks.
no code implementations • 30 Sep 2022 • Andrea Atzori, Gianni Fenu, Mirko Marras
Commonly, the recognition threshold of a face recognition system is adjusted based on the degree of security for the considered use case.
1 code implementation • 11 Sep 2022 • Giacomo Balloccu, Ludovico Boratto, Gianni Fenu, Mirko Marras
However, the existing explainable recommendation approaches based on KG merely optimize the selected reasoning paths for product relevance, without considering any user-level property of the paths for explanation.
1 code implementation • 23 Aug 2022 • Andrea Atzori, Gianni Fenu, Mirko Marras
In this paper, we propose a novel explanatory framework aimed to provide a better understanding of how face recognition models perform as the underlying data characteristics (protected attributes: gender, ethnicity, age; non-protected attributes: facial hair, makeup, accessories, face orientation and occlusion, image distortion, emotions) on which they are tested change.
no code implementations • 4 Jul 2022 • Jade Maï Cock, Mirko Marras, Christian Giang, Tanja Käser
In this paper, we investigate the quality and generalisability of models for an early prediction of conceptual understanding based on clickstream data of students across interactive simulations.
1 code implementation • 1 Jul 2022 • Vinitra Swamy, Bahar Radmehr, Natasa Krco, Mirko Marras, Tanja Käser
Neural networks are ubiquitous in applied machine learning for education.
no code implementations • 23 Jun 2022 • Gianni Fenu, Roberta Galici, Mirko Marras
In recent years, there has been a stimulating discussion on how artificial intelligence (AI) can support the science and engineering of intelligent educational applications.
2 code implementations • 25 Apr 2022 • Vinitra Swamy, Mirko Marras, Tanja Käser
Despite the increasing popularity of massive open online courses (MOOCs), many suffer from high dropout and low success rates.
1 code implementation • 24 Apr 2022 • Mirko Marras, Pawel Korus, Anubhav Jain, Nasir Memon
In this paper, we propose dictionary attacks against speaker verification - a novel attack vector that aims to match a large fraction of speaker population by chance.
1 code implementation • 24 Apr 2022 • Giacomo Balloccu, Ludovico Boratto, Gianni Fenu, Mirko Marras
Existing explainable recommender systems have mainly modeled relationships between recommended and already experienced products, and shaped explanation types accordingly (e. g., movie "x" starred by actress "y" recommended to a user because that user watched other movies with "y" as an actress).
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no code implementations • 24 Apr 2022 • Mirko Marras, Ludovico Boratto, Guilherme Ramos, Gianni Fenu
Engaging all content providers, including newcomers or minority demographic groups, is crucial for online platforms to keep growing and working.
no code implementations • 30 Mar 2022 • Guilherme Ramos, Ludovico Boratto, Mirko Marras
A notable example is represented by reputation-based ranking systems, a class of systems that rely on users' reputation to generate a non-personalized item-ranking, proved to be biased against certain demographic classes.
1 code implementation • 21 Jan 2022 • Ludovico Boratto, Gianni Fenu, Mirko Marras, Giacomo Medda
In this paper, we conduct a systematic analysis of mitigation procedures against consumer unfairness in rating prediction and top-n recommendation tasks.
no code implementations • 29 Apr 2021 • Gianni Fenu, Giacomo Medda, Mirko Marras, Giacomo Meloni
The human voice conveys unique characteristics of an individual, making voice biometrics a key technology for verifying identities in various industries.
no code implementations • 7 Jun 2020 • Ludovico Boratto, Gianni Fenu, Mirko Marras
The resulting recommended lists show fairer visibility and exposure, higher minority item coverage, and negligible loss in recommendation utility.
no code implementations • 7 Jun 2020 • Ludovico Boratto, Gianni Fenu, Mirko Marras
We characterize the recommendations of representative algorithms by means of the proposed metrics, and we show that the item probability of being recommended and the item true positive rate are biased against the item popularity.
no code implementations • 7 Jun 2020 • Mirko Marras, Ludovico Boratto, Guilherme Ramos, Gianni Fenu
To reduce this effect, we propose a novel post-processing approach that balances personalization and equality of recommended opportunities.
no code implementations • 14 May 2020 • Sérgio Nunes, Suzanne Little, Sumit Bhatia, Ludovico Boratto, Guillaume Cabanac, Ricardo Campos, Francisco M. Couto, Stefano Faralli, Ingo Frommholz, Adam Jatowt, Alípio Jorge, Mirko Marras, Philipp Mayr, Giovanni Stilo
In this report, we describe the experience of organizing the ECIR 2020 Workshops in this scenario from two perspectives: the workshop organizers and the workshop participants.