arXiv AI By Bingchao Wang, Yongcheng Jing, Chengyu Wang, Jun Huang, Jie Yang, Wei Liu, Dacheng Tao

AdaGround: Token-Normalized Adaptive Zooming with Verifier-in-the-Loop Refinement for GUI Grounding

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AdaGround is a training‑free framework for GUI grounding that addresses shortcomings of existing zooming methods. It introduces Token‑Normalized Adaptive Zooming to match magnification to target size, a Verifier‑in‑the‑Loop Refinement that uses a simple Yes/No click to accept or reject zooms and decide when to abstain, and Compositional Structure Grounding for spreadsheet cells. Experiments on Qwen3‑VL models show AdaGround outperforms state‑of‑the‑art training‑free zooming techniques and many trained GUI models, boosting accuracy by 7.4 to 20.6 points on OSWorld‑G and ScreenSpot‑Pro and maintaining gains on unseen UI‑Vision data.

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