Author

Antonio Purificato

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Preprint Jul 2026

Art Beyond Semantics: Sheaf-Informed Contrastive Learning for Multi-Relational Representations

This work introduces CANVAS (Contrastive Art-aware Network for Vision-Language Alignment with Sheaves), a framework for learning relation-aware multimodal representations inspired by sheaf theory, and evaluates on three newly introduced benchmarks of artworks for multi-relational art understanding.

Ludovica Schaerf, Antonio Purificato, Piera Riccio et al. · 1 citation

#natural language process... Preprint Aug 2026

QUORUM: QUality-Optimized Routing Using Multiple annotators

This work introduces QUORUM (QUality-Optimized Routing Using Multiple annotators), a budget-aware routing framework that dynamically assigns each instance to human or LLM annotators under a fixed annotation budget and supports multiple annotations per instance, combining them through agreement-based rewards to improve reliability.

Antonio Purificato, Maria Sofia Bucarelli, Andrea Bacciu et al. · 0 citations

#artificial intelligence Mar 2026

Select, Label, Evaluate: Active Testing in NLP

This work formalizes Active Testing in NLP and conducts an extensive benchmarking of existing approaches across 18 datasets and 4 embedding strategies spanning 4 different NLP tasks, revealing variations in method effectiveness across different data characteristics and task types.

Antonio Purificato, Maria Sofia Bucarelli, Andrea Bacciu et al. · arXiv.org · 1 citation