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Author

Jing Ou

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Preprint Sep 2026

CitySTAR: Structured and Topology-Aware Reasoning for Open-Vocabulary Urban 3D Grounding

The reformulate city-scale 3D grounding as structured constraint reasoning, where description semantics are organized into computable cross-modal constraints over open-vocabulary 3D entities, attributes, and spatial relations, and introduces CitySTAR-3D, an enhanced benchmark that improves semantic coverage, instance c...

Shuai Zhang, Hong-Ye Hou, Qing-He Liu et al. · 0 citations
Open access Jul 2026

GeoOpen3D: Geometry-guided training-free open-vocabulary 3D segmentation via visual foundation models

Abstract. Open-vocabulary 3D segmentation offers an attractive alternative to closed-set scene parsing, yet directly transferring 2D vision-language models to outdoor point clouds remains difficult because projection disrupts geometric continuity and sparse sampling weakens mask quality. This paper presents GeoOpen3D,...

Shuai Zhang, Zhuo Li, Jing Ou et al. · 0 citations

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