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N. Sebe

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#machine learning Preprint Oct 2026

Constant-Curvature Sliced Gromov-Wasserstein for Heterogeneous Cross-Curvature Alignment

Recent advances in representation learning have highlighted the utility of constant-curvature models, such as hyperbolic and spherical spaces, for modeling complex data. Mixed-curvature models further enhance this by integrating multiple constant-curvature components. However, these models typically learn each componen...

Shang-Lin Li, Wen-Jing Lu, Mu-Yang Li et al. · 0 citations
2026

Federated Generalized Category Discovery via Personalized Contrastive Graph Learning

In this work, we investigate the task of Federated Generalized Category Discovery (Fed-GCD), which aims to leverage labeled data from known classes to cluster unlabeled samples from both known and unknown classes through privacy-preserving collaboration among clients. Existing Fed-GCD methods predominantly emphasize im...

Wen-Jing Li, Nan Pu, Jessica Fan et al. · 0 citations
Conference Open access Sep 2026

Riemannian Graph Convolutional Network for Skeleton-Based Two-Person Interaction Recognition

This work model high-order skeletal statistics via Gaussian embedding and propose a Riemannian network to capture inter-subject interactions and global correlations and shows that RGCN provides a competitive and geometrically grounded alternative for skeleton-based interaction recognition.

Rui Wang, Zi-Hao Bi, Chen Hu et al. · 0 citations
#artificial intelligence Preprint Jan 2026

POCI-Diff: 3D-Layout Guided Diffusion for Controllable Synthetic Surveillance Data Generation

This work introduces POCI-Diff (Positioning Objects Consistently and Interactively), a framework that generates annotated synthetic scenes from explicit 3D bounding-box layouts with per-object semantic control and proposes a warping-free editing pipeline supporting object insertion, removal, and transformation via rege...

Andrea Rigo, Luca Stornaiuolo, Weijie Wang et al. · 2 citations
Jun 2026

Harnessing Textual Refusal Directions for Multimodal Safety

Modality-Agnostic Refusal Steering (MARS), a light-weight training-free approach that injects multimodal safety without the need for multimodal safety data, achieves consistent safety gains while preserving utility.

Moreno D'Incà, Massimiliano Mancini, N. Sebe · 0 citations

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