[2605.04304] Hierarchical Visual Agent: Managing Contexts in Joint Image-Text Space for Advanced Chart Reasoning
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Computer Science > Computer Vision and Pattern Recognition
arXiv:2605.04304 (cs)
[Submitted on 5 May 2026]
Title:Hierarchical Visual Agent: Managing Contexts in Joint Image-Text Space for Advanced Chart Reasoning
Authors:Qihua Dong, Ruozhen He, Junwen Chen, Yizhou Wang, Xu Ma, Songyao Jiang, Yun Fu
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Abstract:Advanced chart question answering requires both precise perception of small visual elements and multi-step reasoning across several subplots. While existing MLLMs are strong at understanding single plots, they often struggle with multi-step reasoning across multiple subplots. We propose HierVA, a hierarchical visual agent framework for chart reasoning that iteratively constructs and updates a working context in a joint image--text space. A high-level manager generates plans and maintains a compact context containing only key information, while specialized workers perform reasoning, gather evidence, and return results. In particular, the agent maintains separate visual and textual contexts, using a zoom-in tool to restrict the visual context. Experiments on the CharXiv reasoning subset demonstrate consistent improvements over strong multimodal baselines, and ablation studies verify that hierarchical architecture, scoped visual context, and distilled context contribute complementary gains.
Comments: Accepted to ACL 2026
Subjects:
Computer Vision and Pattern Recognition (cs.CV); Computation and Language (cs.CL)
Cite as: arXiv:2605.04304 [cs.CV]
(or arXiv:2605.04304v1 [cs.CV] for this version)
https://doi.org/10.48550/arXiv.2605.04304
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arXiv-issued DOI via DataCite (pending registration)
Submission history
From: Qihua Dong [view email] [v1] Tue, 5 May 2026 21:12:01 UTC (1,694 KB)
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