arXiv Computer Vision By Kuankuan Cheng, Haocheng Yuan, Changjian Li

SemEllipsoid: Semantic-aware Shape Abstraction with Ellipsoid

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SemEllipsoid introduces a semantic‑aware shape abstraction method that uses ellipsoidal primitives to represent 3D shapes. Unlike prior geometry‑only approaches, it enforces that each primitive lies entirely within a single semantic part by incorporating semantic constraints derived from large‑scale foundation models. The fully differentiable projection‑blending‑evaluation framework allows iterative optimization of both primitive placement and semantic assignment without requiring training data, and the method supports adjustable abstraction levels across diverse shape categories.

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