BRIT: Bidirectional Retrieval over Unified Image-Text Graph

Ainulla Khan; Yamada Moyuru; Srinidhi Akella

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arXiv · 2505.18450

BRIT: Bidirectional Retrieval over Unified Image-Text Graph

Ainulla Khan·Yamada Moyuru·Srinidhi Akella

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Abstract

Retrieval-Augmented Generation (RAG) has emerged as a promising technique to enhance the quality and relevance of responses generated by large language models. While recent advancements have mainly focused on improving RAG for text-based queries, RAG on multi-modal documents containing both texts and images has not been fully explored. Especially when fine-tuning does not work. This paper proposes BRIT, a novel multi-modal RAG framework that effectively unifies various text-image connections in the document into a multi-modal graph and retrieves the texts and images as a query-specific sub-graph. By traversing both image-to-text and text-to-image paths in the graph, BRIT retrieve not only directly query-relevant images and texts but also further relevant contents to answering complex cross-modal multi-hop questions. To evaluate the effectiveness of BRIT, we introduce MM-RAG test set specifically designed for multi-modal question answering tasks that require to understand the text-image relations. Our comprehensive experiments demonstrate the superiority of BRIT, highlighting its ability to handle cross-modal questions on the multi-modal documents.

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BibTeX RIS

Ainulla Khan, Yamada Moyuru, Srinidhi Akella. 2025-09-27. BRIT: Bidirectional Retrieval over Unified Image-Text Graph. https://arxiv.org/abs/2505.18450

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