SpatialLLM: A Compound 3D-Informed Design towards Spatially-Intelligent Large Multimodal Models Article Swipe

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Wufei Ma , Luoxin Ye , Celso M. de Melo , Jieneng Chen , Alan Yuille ·

YOU? · · 2025 · Open Access · · DOI: https://doi.org/10.48550/arxiv.2505.00788

Humans naturally understand 3D spatial relationships, enabling complex reasoning like predicting collisions of vehicles from different directions. Current large multimodal models (LMMs), however, lack of this capability of 3D spatial reasoning. This limitation stems from the scarcity of 3D training data and the bias in current model designs toward 2D data. In this paper, we systematically study the impact of 3D-informed data, architecture, and training setups, introducing SpatialLLM, a large multi-modal model with advanced 3D spatial reasoning abilities. To address data limitations, we develop two types of 3D-informed training datasets: (1) 3D-informed probing data focused on object's 3D location and orientation, and (2) 3D-informed conversation data for complex spatial relationships. Notably, we are the first to curate VQA data that incorporate 3D orientation relationships on real images. Furthermore, we systematically integrate these two types of training data with the architectural and training designs of LMMs, providing a roadmap for optimal design aimed at achieving superior 3D reasoning capabilities. Our SpatialLLM advances machines toward highly capable 3D-informed reasoning, surpassing GPT-4o performance by 8.7%. Our systematic empirical design and the resulting findings offer valuable insights for future research in this direction. Our project page is available at: https://3d-spatial-reasoning.github.io/spatial-llm/

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Type: preprint
Language: en
Landing Page: http://arxiv.org/abs/2505.00788
PDF: https://arxiv.org/pdf/2505.00788
OA Status: green
OpenAlex ID: https://openalex.org/W4414769088

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DOI: https://doi.org/10.48550/arxiv.2505.00788

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Title: SpatialLLM: A Compound 3D-Informed Design towards Spatially-Intelligent Large Multimodal Models

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Type: preprint

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Language: en

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Publication year: 2025

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Publication date: 2025-05-01

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Authors: Wufei Ma, Luoxin Ye, Celso M. de Melo, Jieneng Chen, Alan Yuille

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Landing page: https://arxiv.org/abs/2505.00788

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PDF URL: https://arxiv.org/pdf/2505.00788

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