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arXiv · 2503.15300

SUM Parts: Benchmarking Part-Level Semantic Segmentation of Urban Meshes

Weixiao Gao·Liangliang Nan·Hugo Ledoux
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Abstract

Semantic segmentation in urban scene analysis has mainly focused on images or point clouds, while textured meshes - offering richer spatial representation - remain underexplored. This paper introduces SUM Parts, the first large-scale dataset for urban textured meshes with part-level semantic labels, covering about 2.5 km2 with 21 classes. The dataset was created using our own annotation tool, which supports both face- and texture-based annotations with efficient interactive selection. We also provide a comprehensive evaluation of 3D semantic segmentation and interactive annotation methods on this dataset. Our project page is available at https://tudelft3d.github.io/SUMParts/.

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Weixiao Gao, Liangliang Nan, Hugo Ledoux. 2025-03-19. SUM Parts: Benchmarking Part-Level Semantic Segmentation of Urban Meshes. https://arxiv.org/abs/2503.15300

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