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

HiKEY: Hierarchical Multimodal Retrieval for Open-Domain Document Question Answering arXiv:2605.29606v1 Announce Type: new Abstract: Retrieval-augmented generation (RAG) for document-based Open-domain Question Answering (ODQA) on large-scale industrial corpora faces two critical bottlenecks: routing failure in locating the correct document and evidence fragmentation in integrating scattered information. Existing approaches relying on flat text chunks or page-level images inherently struggle to