Grounded 3D-LLM with Referent Tokens
Authors: name: Yilun Chen, name: Shuai Yang, name: Haifeng Huang, name: Tai Wang, name: Ruiyuan Lyu, name: Runsen Xu, name: Dahua Lin, name: Jiangmiao Pang

Prior studies on 3D scene understanding have primarily developed specialized
models for specific tasks or required task-specific fine-tuning. In this study,
we propose Grounded 3D-LLM, which explores the potential of 3D large
multi-modal models (3D LMMs) to consolidate various 3D vision tasks within a
unified generative framework. The model uses scene referent tokens as special
noun phrases to reference 3D scenes, enabling the handling of sequences that
interleave 3D and textual data. It offers a natural approach for translating 3D
vision tasks into language formats using task-specific instruction templates.
To facilitate the use of referent tokens in subsequent language modeling, we
have curated large-scale grounded language datasets that offer finer scene-text
correspondence at the phrase level by bootstrapping existing object labels.
Subsequently, we introduced Contrastive LAnguage-Scene Pre-training (CLASP) to
effectively leverage this data, thereby integrating 3D vision with language
models. Our comprehensive evaluation covers open-ended tasks like dense
captioning and 3D QA, alongside close-ended tasks such as object detection and
language grounding. Experiments across multiple 3D benchmarks reveal the
leading performance and the broad applicability of Grounded 3D-LLM. Code and
datasets will be released on the project page:
https://groundedscenellm.github.io/grounded_3d-llm.github.io.