HiKEY: Hierarchical Multimodal Retrieval for Open-Domain Document Question Answering

Authors

Joongmin Shin*, Gyuho Shim, Jeongbae Park, Jaehyung Seo, Heuiseok Lim

Abstract

HiKEY introduces a hierarchical multimodal retrieval framework for open-domain document question answering. The system combines global routing, local ranking, and structured evidence assembly to improve retrieval quality across long and visually complex documents.

Key Contribution

Hierarchical retrieval for multimodal document QA with structured evidence assembly.

Architecture

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