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AutoPartGen: Autogressive 3D Part Generation and Discovery

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arxiv 2507.13346 v2 pith:CSEYX2WF submitted 2025-07-17 cs.CV

AutoPartGen: Autogressive 3D Part Generation and Discovery

classification cs.CV
keywords partsgenerationautopartgenobjectmodelobjectspartadditional
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We introduce AutoPartGen, a model that generates objects composed of 3D parts in an autoregressive manner. This model can take as input an image of an object, 2D masks of the object's parts, or an existing 3D object, and generate a corresponding compositional 3D reconstruction. Our approach builds upon 3DShape2VecSet, a recent latent 3D representation with powerful geometric expressiveness. We observe that this latent space exhibits strong compositional properties, making it particularly well-suited for part-based generation tasks. Specifically, AutoPartGen generates object parts autoregressively, predicting one part at a time while conditioning on previously generated parts and additional inputs, such as 2D images, masks, or 3D objects. This process continues until the model decides that all parts have been generated, thus determining automatically the type and number of parts. The resulting parts can be seamlessly assembled into coherent objects or scenes without requiring additional optimization. We evaluate both the overall 3D generation capabilities and the part-level generation quality of AutoPartGen, demonstrating that it achieves state-of-the-art performance in 3D part generation.

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Forward citations

Cited by 8 Pith papers

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