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首次观测 · 记录 #1CVF · CVPR 2026:cvf:0084be322a5f7055bdb8126a200749efCVF · CVPR 2026

GaussianFluent: Gaussian Simulation for Dynamic Scenes with Mixed Materials

Huang, Bei, Chen, Yixin, Lu, Ruijie, Zeng, Gang, Zha, Hongbin, Pei, Yuru, Huang, Siyuan

原文摘要

3D Gaussian Splatting (3DGS) has emerged as a prominent 3D representation for high-fidelity and real-time rendering. Prior work has coupled physics simulation with Gaussians, but predominantly targets soft, deformable materials, leaving brittle fracture largely unresolved. This stems from two key obstacles: the lack of volumetric interiors with coherent textures in GS representation, and the absence of fracture-aware simulation methods for Gaussians. To address these challenges, we introduce GaussianFluent, a unified framework for realistic simulation and rendering of dynamic object states. First, it synthesizes photorealistic interiors by densifying internal Gaussians guided by generative models. Second, it integrates an optimized Continuum Damage Material Point Method (CD-MPM) to enable brittle fracture simulation at remarkably high speed. Our approach handles complex scenarios including mixed-material objects and multi-stage fracture propagation, achieving results infeasible with previous methods. Experiments clearly demonstrate GaussianFluent's capability for photo-realistic, real-time rendering with structurally consistent interiors, highlighting its potential for downstream application, such as VR and Robotics.

cs.CV

Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition · 2026 · 正式发表

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CVF · CVPR 2026 ↗PDF ↗
首次观测 · 记录 #1CVF · CVPR 2026:cvf:52eb451fe0e467f3e7b53181b9d2314dCVF · CVPR 2026

ST4R-Splat: Spatio-Temporal Referring Segmentation in 4D Gaussian Splatting

Meng, Yuming, Wu, Dong, Zha, Hongbin

原文摘要

Understanding objects in dynamic 4D environments via natural language is crucial yet underexplored. While existing methods focus on static 3D referring segmentation or open-vocabulary 4D querying, they struggle to ground complex spatio-temporal referring expressions in explicit 4D reconstructions. We introduce Spatio-Temporal Referring Segmentation in 4D Gaussian Splatting (STRS-4DGS), a novel task aiming to jointly identify and segment a target instance across space and time given a referring expression. To tackle this, we propose ST4R-Splat, the first framework for STRS-4DGS. Specifically, our framework incorporates an Instance-Aware 4D Gaussian Referring Field that assigns time-invariant embeddings for robust spatial grounding, and an Instance-Level Temporal State Mapping module that enables view-independent temporal localization directly in feature space. To provide rich spatio-temporal semantic supervision, we develop an automatic, MLLM-based captioning pipeline that generates decoupled spatial and temporal textual descriptions. Evaluated on our newly constructed STRS-4DGS benchmark, our method significantly outperforms adapted state-of-the-art baselines across both time-agnostic and time-sensitive metrics, establishing a strong foundation for language-driven 4D scene understanding.

cs.CV

Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition · 2026 · 正式发表

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CVF · CVPR 2026 ↗PDF ↗
首次观测 · 记录 #1CVF · CVPR 2026:cvf:5adcf1bc29e2d91135183f501f13491aCVF · CVPR 2026

Online3R: Online Learning for Consistent Sequential Reconstruction Based on Geometry Foundation Model

Zhou, Shunkai, Yan, Zike, Xue, Fei, Wu, Dong, Deng, Yuchen, Zha, Hongbin

原文摘要

We present Online3R, a new sequential reconstruction framework that is capable of adapting to new scenes through online learning, effectively resolving inconsistency issues. Specifically, we introduce a set of learnable lightweight visual prompts into a pretrained, frozen geometry foundation model to capture the knowledge of new environments while preserving the fundamental capability of the foundation model for geometry prediction. To solve the problems of missing groundtruth and the requirement of high efficiency when updating these visual prompts at test time, we introduce a local-global self-supervised learning strategy by enforcing the local and global consistency constraints on predictions. The local consistency constraints are conducted on intermediate and previously local fused results, enabling the model to be trained with high-quality pseudo groundtruth signals; the global consistency constraints are operated on sparse keyframes spanning long distances rather than per frame, allowing the model to learn from a consistent prediction over a long trajectory in an efficient way. Our experiments demonstrate that Online3R outperforms previous state-of-the-art methods on various benchmarks. Project page: https://shunkaizhou.github.io/online3r-1.0/

cs.CV

Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition · 2026 · 正式发表

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CVF · CVPR 2026 ↗PDF ↗
首次观测 · 记录 #1CVF · CVPR 2026:cvf:de506fbaa1dc9bb943d7f8361eaab3c1CVF · CVPR 2026

Learning Differentiable Hierarchies in 3D Gaussian Splatting

Pan, Youqi, Zhou, Wugen, Zha, Hongbin

原文摘要

Although 3D Gaussian Splatting (3DGS) has achieved impressive performance in real-time rendering, its unordered Gaussians make level-of-detail (LoD) construction and model compression highly challenging, limiting its applicability in customized scenarios.In this work, we propose a learning-based Gaussian hierarchy representation that ranks Gaussians by their contribution to the scene, enabling flexible LoD representations across arbitrary Gaussian counts.We first introduce a unified, continuous formulation and metric for Gaussian hierarchy. Then, we introduce a hierarchy-based modulated rendering method built upon a Differentiable Decreasing Step Function, which enables efficient hierarchy learning while maintaining approximately equivalent rendering. Moreover, we develop a PDF-Guided Active-Region Sampling strategy that encourages the learned hierarchy to become widely distributed within its value range.Our method requires no additional training stages and produces Gaussian hierarchies within training time comparable to classical 3DGS. Experiments on multiple datasets show that our approach achieves performance comparable to or surpassing state-of-the-art methods in both LoD rendering and model pruning.

cs.CV

Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition · 2026 · 正式发表

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CVF · CVPR 2026 ↗PDF ↗