arXiv AI By Yifan Zhou, Ziyang Gong, Xiaojun Ye, Yifei Liu, Donggang Li, Xiaolong Zhou, Zhihang Zhong, Xue Yang

SpatialBrain: Spatial Intelligence Growing from Experience

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SpatialBrain is a framework that enhances spatial reasoning by retaining experience about when to observe, reconstruct, measure, or change reference frames while keeping its vision-language backbone unchanged. It fuses current observations into queryable spatial relations, offers reusable tool procedures through a Spatial Skill Library, and associates task conditions with experience via Spatial Cognition. The system abstracts completed trajectories into process records, consolidating knowledge across task blocks to inform future decisions without transferring scene coordinates or reference answers, and demonstrates improved performance on four out of five spatial-reasoning benchmarks.

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