CONF Baia_ECCVW_2024/IDIAP Image-guided topic modeling for interpretable privacy classification Baia, Alina Elena Cavallaro, Andrea Interpretability topic modeling Vision language models EXTERNAL http://publications.idiap.ch/attachments/papers/2024/Baia_ECCVW_2024.pdf PUBLIC Proceedings of the European Conference on Computer Vision (ECCV) Workshops 2024 Predicting and explaining the private information contained in an image in human-understandable terms is a complex and contextual task. This task is challenging even for large language models. To facilitate the understanding of privacy decisions, we propose to predict image privacy based on a set of natural language content descriptors. These content descriptors are associated with privacy scores that reflect how people perceive image content. We generate descriptors with our novel Image-guided Topic Modeling (ITM) approach. ITM leverages, via multimodality alignment, both vision information and image textual descriptions from a vision language model. We use the ITM-generated descriptors to learn a privacy predictor, Priv×ITM, whose decisions are interpretable by design. Our Priv×ITM, classifier outperforms the reference interpretable method by 5 percentage points in accuracy and performs comparably to the current non-interpretable state-of-the-art model.