ReCap: Event-Aware Image Captioning with Article Retrieval and Semantic Gaussian Normalization

• URL: http://arxiv.org/abs/2509.01259v1
• Date: Mon, 01 Sep 2025 08:48:33 GMT
• Title: ReCap: Event-Aware Image Captioning with Article Retrieval and Semantic Gaussian Normalization
• Authors: Thinh-Phuc Nguyen, Thanh-Hai Nguyen, Gia-Huy Dinh, Lam-Huy Nguyen, Minh-Triet Tran, Trung-Nghia Le,
• Abstract summary: ReCap is a novel pipeline for event-enriched image retrieval and captioning.<n>It incorporates broader contextual information from relevant articles to generate narrative-rich captions.<n>Our approach addresses the limitations of standard vision-language models.
• Score: 9.914251544971686
• License: http://creativecommons.org/licenses/by-nc-sa/4.0/
• Abstract: Image captioning systems often produce generic descriptions that fail to capture event-level semantics which are crucial for applications like news reporting and digital archiving. We present ReCap, a novel pipeline for event-enriched image retrieval and captioning that incorporates broader contextual information from relevant articles to generate narrative-rich, factually grounded captions. Our approach addresses the limitations of standard vision-language models that typically focus on visible content while missing temporal, social, and historical contexts. ReCap comprises three integrated components: (1) a robust two-stage article retrieval system using DINOv2 embeddings with global feature similarity for initial candidate selection followed by patch-level mutual nearest neighbor similarity re-ranking; (2) a context extraction framework that synthesizes information from article summaries, generic captions, and original source metadata; and (3) a large language model-based caption generation system with Semantic Gaussian Normalization to enhance fluency and relevance. Evaluated on the OpenEvents V1 dataset as part of Track 1 in the EVENTA 2025 Grand Challenge, ReCap achieved a strong overall score of 0.54666, ranking 2nd on the private test set. These results highlight ReCap's effectiveness in bridging visual perception with real-world knowledge, offering a practical solution for context-aware image understanding in high-stakes domains. The code is available at https://github.com/Noridom1/EVENTA2025-Event-Enriched-Image-Captioning.

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