Author

Youngsub Han

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Preprint Sep 2026

When Does an Image Determine the Answer? Benchmarking Visual Answerability across Charts and Scenes

A benchmark that connects complete-question evaluation with explicit evidence for its labels across PlotQA charts, CLEVR rendered scenes, and GQA photographs is introduced, exposing failures that answerability decisions alone conceal.

Sungguk Cha, Mintae Kim, Youngsub Han et al. · 0 citations

Jul 2026

Do Current Retrievers Cover All the Evidence? A Controlled Study of Conjunctive Cross-Page Retrieval

The results identify condition coverage, rather than gold discovery alone, as the central bottleneck for conjunctive document retrieval, and page-aware visual systems surface stored support for every condition on only 5.3% of queries.

Sungguk Cha, Dongwook Kim, Mintae Kim et al. · arXiv.org · 0 citations